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Combating Root-Knot Nematodes (Meloidogyne spp.): From Molecular Mechanisms to Resistant Crops
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The Regulatory Roles of RNA-Binding Proteins in Plant Salt Stress Response
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Elevated Growth Temperature Modifies Drought and Shade Responses of Fagus sylvatica Seedlings by Altering Growth, Gas Exchange, Water Relations, and Xylem Function
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Determination of Optimal Harvest Time in Cannabis sativa L. Based upon Stigma Color Transition
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Floral Biology, Breeding System and Conservation Implications for the Azorean Endemic Azorina vidalii (Campanulaceae)
Journal Description
Plants
Plants
is an international, scientific, peer-reviewed, open access journal on plant science published semimonthly online by MDPI. The Australian Society of Plant Scientists (ASPS), the Spanish Phytopathological Society (SEF), the Spanish Society of Plant Biology (SEBP), the Spanish Society of Horticultural Sciences (SECH) and the Italian Society of Phytotherapy (S.I.Fit.) are affiliated with Plants and their members receive a discount on the article processing charges.
- Open Access— free for readers, with article processing charges (APC) paid by authors or their institutions.
- High Visibility: indexed within Scopus, SCIE (Web of Science), PubMed, PMC, PubAg, AGRIS, CAPlus / SciFinder, and other databases.
- Journal Rank: JCR - Q1 (Plant Sciences) / CiteScore - Q1 (Ecology, Evolution, Behavior and Systematics)
- Rapid Publication: manuscripts are peer-reviewed and a first decision is provided to authors approximately 17.7 days after submission; acceptance to publication is undertaken in 2.6 days (median values for papers published in this journal in the first half of 2025).
- Recognition of Reviewers: reviewers who provide timely, thorough peer-review reports receive vouchers entitling them to a discount on the APC of their next publication in any MDPI journal, in appreciation of the work done.
Impact Factor:
4.1 (2024);
5-Year Impact Factor:
4.5 (2024)
Latest Articles
Secondary Metabolites of Bacillus zhangzhouensis from Zygophyllum oxianum and Their Antifungal and Plant Growth-Regulating Properties
Plants 2025, 14(13), 2058; https://doi.org/10.3390/plants14132058 - 4 Jul 2025
Abstract
Plant species harbor diverse rhizospheric bacteria within their resilient root zones, serving as a valuable reservoir of bioactive microorganisms with strong potential for natural antifungal and plant growth-promoting applications. This study aimed to investigate the antagonistic potential of Bacillus zhangzhouensis, isolated from
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Plant species harbor diverse rhizospheric bacteria within their resilient root zones, serving as a valuable reservoir of bioactive microorganisms with strong potential for natural antifungal and plant growth-promoting applications. This study aimed to investigate the antagonistic potential of Bacillus zhangzhouensis, isolated from Zygophyllum oxianum in the Aral Sea region, Uzbekistan, against the fungal pathogen Cytospora mali. Due to its strong antifungal activity, B. zhangzhouensis was selected for bioactive compound profiling. Methanolic extracts were fractionated via silica and Sephadex gel chromatography, followed by antifungal screening using the agar diffusion method. A highly active fraction (dichloromethane/methanol, 9:1) underwent further purification, yielding twelve antifungal sub-fractions. Mass spectrometry analysis across positive and negative ion modes identified 2475 metabolites, with polar solvents—particularly methanol—enhancing compound recovery. Refinement using Bacillus-specific references identified six known antibiotics. Four pure compounds were isolated and structurally characterized using NMR: oleanolic acid, ursolic acid, cyclo-(Pro-Ser), and uracil. Their growth regulatory activity was assessed on Amaranthus retroflexus, Nicotiana benthamiana, triticale, and Triticum aestivum at concentrations of 5, 20, 100, and 500 mg L−1. All compounds negatively affected root growth in a concentration-dependent manner, especially in monocots. Interestingly, some treatments enhanced stem growth, particularly in N. benthamiana. These findings indicate that B. zhangzhouensis produces diverse bioactive compounds with dual antifungal and plant growth-modulatory effects, highlighting its potential as a biocontrol agent and a source of natural bioactive compounds.
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(This article belongs to the Section Plant Protection and Biotic Interactions)
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Urban Phytoremediation: A Nature-Based Solution for Environmental Reclamation and Sustainability
by
Luca Di Stasio, Annamaria Gentile, Dario Nicola Tangredi, Paolo Piccolo, Gianmaria Oliva, Giovanni Vigliotta, Angela Cicatelli, Francesco Guarino, Werther Guidi Nissim, Massimo Labra and Stefano Castiglione
Plants 2025, 14(13), 2057; https://doi.org/10.3390/plants14132057 - 4 Jul 2025
Abstract
Starting from the Industrial Revolution in the 18th century to date, urban areas have faced increasing environmental challenges due to the diffusion of harmful substances, resulting from vehicular traffic, the activities of different industries, waste, and building construction, etc. These pollutants are dangerous,
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Starting from the Industrial Revolution in the 18th century to date, urban areas have faced increasing environmental challenges due to the diffusion of harmful substances, resulting from vehicular traffic, the activities of different industries, waste, and building construction, etc. These pollutants are dangerous, since they pose a threat to both the environment and human health. Phytoremediation is an environmentally friendly and low-cost technique that uses plants and their associated microorganisms to clean-up contaminated sites. In this review, we explore its main applications in urban settings. Specifically, we investigate how phytoremediation works, highlighting the most effective plants for its success in a city context. Moreover, we also describe the main factors influencing its effectiveness, such as soil, climate, and pollutants. In this regard, several case studies, conducted worldwide, have reported on how phytoremediation can successfully reclaim contaminated areas, transforming them into reusable city green spaces, with reduced costs compared to traditional remediation techniques (e.g., soil replacement, soil washing, etc.). Moreover, by integrating it into urban planning, cities can address environmental pollution, while promoting biodiversity, enhancing the landscape, and increasing its social acceptance. This nature-based solution offers a practical path toward more sustainable and resilient urban environments, especially in regard to the climate change framework.
Full article
(This article belongs to the Special Issue Advances in Phytomanagement for Soil Health Restoration and Sustainability)
Open AccessArticle
Analysis of Biomorphs in the Teleorman County of Romania
by
Maria Magdalena Cernat Popa and Carmen Otilia Rusănescu
Plants 2025, 14(13), 2056; https://doi.org/10.3390/plants14132056 - 4 Jul 2025
Abstract
The study of flora is crucial for conserving natural resources and assessing human impact on the environment. This paper explores floristic diversity, the role of plants, and the integration of technology in botanical research. In the studied area, 462 plant species were identified.
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The study of flora is crucial for conserving natural resources and assessing human impact on the environment. This paper explores floristic diversity, the role of plants, and the integration of technology in botanical research. In the studied area, 462 plant species were identified. Bioform analysis revealed a predominance of hemicryptophytes (45.45%) and therophytes (26.19%), suggesting a warm climate and significant zoo-anthropogenic influences. Other bioforms were present in lower percentages. Most plant species in Teleorman County are mesophilic (39.39%) and mesoxerophilic (30.95%), indicating adaptation to moderate or slightly dry environments. Regarding temperature affinity, the majority are micromesotherms (62.98%), suited for mild thermal conditions. Soil reaction analysis showed a preference for weakly acidic neutrophilic (39.82%) and euryionic (33.76%) soils, indicating tolerance for neutral to slightly acidic pH levels. The research evaluates the structure and diversity of flora in Teleorman County and emphasizes the influence of climate factors such as humidity, temperature, and soil pH on species distribution. Using the transect method and fractal analysis, this study concludes that temperature is the dominant climatic factor shaping local biodiversity.
Full article
(This article belongs to the Special Issue Plant Diversity and Classification)
Open AccessArticle
Optimization of Irrigation Amount and Nitrogen Rate of Drip-Fertigated Sugar Beet Based on Sugar Yield, Nitrogen Use Efficiency, and Critical Nitrogen Dilution Curve in the Arid Southern Xinjiang of China
by
Ying Wang, Fulai Yan, Junliang Fan and Fucang Zhang
Plants 2025, 14(13), 2055; https://doi.org/10.3390/plants14132055 - 4 Jul 2025
Abstract
The critical nitrogen (N) dilution curve is widely used to diagnose crop N status, but no such model has been developed for sugar beet. This study evaluated the effects of irrigation amount and N rate on sugar yield, N use efficiency, and soil
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The critical nitrogen (N) dilution curve is widely used to diagnose crop N status, but no such model has been developed for sugar beet. This study evaluated the effects of irrigation amount and N rate on sugar yield, N use efficiency, and soil nitrate-N (NO3-N) residue of drip-fertigated sugar beet in the arid southern Xinjiang of China. A reliable N nutrition index (NNI) for sugar yield was also established based on a critical N dilution curve derived from the dry matter of sugar beet. A three-year field experiment was established with six N rates (25–480 kg N ha−1) and three irrigation levels based on crop evapotranspiration (ETc) (0.6, 0.8, and 1.0 ETc in 2019 and 2020, and 0.4, 0.6, and 0.8 ETc in 2021). Results showed that sugar yield and N uptake increased and then generally stabilized with increasing N rate, while N use efficiency decreased. Most soil NO3-N was mainly distributed in the 0–60 cm soil layer, but increasing irrigation amount reduced residual NO3-N in the 0–80 cm soil layer. Additionally, the established critical N dilution curve of sugar beet was considered stable (Normalized RMSE = 16.6%), and can be used to calculate plant N requirements and further N rates during sugar beet growth. The results indicated that the optimal NNI was 0.97 under 0.6 ETc for sugar yield production of sugar beet in this study. This study provides a basis for efficient water and N management in sugar beet production in arid and semi-arid regions globally.
Full article
(This article belongs to the Special Issue Nutrient Requirements and Fertilizer Management Strategies in Plant Cultivation)
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Open AccessArticle
The Transcription Factor ZmMYBR24 Gene Is Involved in a Variety of Abiotic Stresses in Maize (Zea mays L.)
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Liangliang Bao, Wen Sun, Jiaxin Wang, Yuyang Zhou, Jiahao Wang, Qi Wang, Dequan Sun, Hong Lin, Jinsheng Fan, Yu Zhou, Lin Zhang, Zhenhua Wang, Chunxiang Li and Hong Di
Plants 2025, 14(13), 2054; https://doi.org/10.3390/plants14132054 - 4 Jul 2025
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MYB transcription factors constitute a diverse and functionally versatile family, playing central roles in regulating plant responses to a range of abiotic stressors. Based on previous research, we identified and characterized a maize MYB transcription factor gene, ZmMYBR24, which is involved in
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MYB transcription factors constitute a diverse and functionally versatile family, playing central roles in regulating plant responses to a range of abiotic stressors. Based on previous research, we identified and characterized a maize MYB transcription factor gene, ZmMYBR24, which is involved in responses to salt, alkali, and low-temperature stress. This study aimed to investigate the function and mechanism of ZmMYBR24 in response to salt, alkali, and low-temperature stresses. We hypothesized that ZmMYBR24 regulates biosynthetic pathways to influence maize resistance to multiple abiotic stresses. The results indicate that ZmMYBR24 expression was markedly upregulated (p < 0.01) and the fold-change in gene expression ranged from 1.54 to 25.69 when plants were exposed to these combined stresses. Phenotypically, the zmmybr24 mutant line exhibited more pronounced inhibition of seedling and root growth under stress compared to the wild-type B73 line. Based on a correlation expression pattern analysis and mutant line evaluation, ZmMYBR24 was confirmed to be a positive regulatory transcription factor for multiple types of abiotic stress resistance. An RNA-seq analysis of both lines revealed differentially expressed genes (DEGs), with gene ontology (GO) and KEGG enrichment analyses indicating that ZmMYBR24 may mediate stress responses by modulating the expression of genes involved in flavonoid biosynthesis. Notable differences were observed in the expression of pathway-associated genes between the mutant and wild-type plants. A haplotype analysis across 80 inbred maize lines revealed 16 ZmMYBR24 coding region haplotypes—comprising 25 SNPs and 17 InDels—with HAP12 emerging as a superior haplotype. These results demonstrate that ZmMYBR24 enhances maize yields by regulating the flavonoid biosynthesis pathway in response to adverse climatic conditions including salt, alkaline conditions, and low temperatures. Collectively, these findings offer novel insights into the molecular mechanisms underlying maize adaptation to combined abiotic stresses and lay the groundwork for breeding programs targeting multi-stress resistance.
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Machine Learning-Driven Identification of Key Environmental Factors Influencing Fiber Yield and Quality Traits in Upland Cotton
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Mohamadou Souaibou, Haoliang Yan, Panhong Dai, Jingtao Pan, Yang Li, Yuzhen Shi, Wankui Gong, Haihong Shang, Juwu Gong and Youlu Yuan
Plants 2025, 14(13), 2053; https://doi.org/10.3390/plants14132053 - 4 Jul 2025
Abstract
Understanding the influence of environmental factors on cotton performance is crucial for enhancing yield and fiber quality in the context of climate change. This study investigates genotype-by-environment (G×E) interactions in cotton, using data from 250 recombinant inbred lines (CCRI70 RILs) cultivated across 14
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Understanding the influence of environmental factors on cotton performance is crucial for enhancing yield and fiber quality in the context of climate change. This study investigates genotype-by-environment (G×E) interactions in cotton, using data from 250 recombinant inbred lines (CCRI70 RILs) cultivated across 14 diverse environments in China’s major cotton cultivation areas. Our findings reveal that environmental effects predominantly influenced yield-related traits (boll weight, lint percentage, and the seed index), contributing to 34.7% to 55.7% of their variance. In contrast fiber quality traits showed lower environmental sensitivity (12.3–27.0%), with notable phenotypic plasticity observed in the boll weight, lint percentage, and fiber micronaire. Employing six machine learning models, Random Forest demonstrated superior predictive ability (R2 = 0.40–0.72; predictive Pearson correlation = 0.63–0.86). Through SHAP-based interpretation and sliding-window regression, we identified key environmental drivers primarily active during mid-to-late growth stages. This approach effectively reduced the number of influential input variables to just 0.1–2.4% of the original dataset, spanning 2–9 critical time windows per trait. Incorporating these identified drivers significantly improved cross-environment predictions, enhancing Random Forest accuracy by 0.02–0.15. These results underscore the strong potential of machine learning to uncover critical temporal environmental factors underlying G×E interactions and to substantially improve predictive modeling in cotton breeding programs, ultimately contributing to more resilient and productive cotton cultivation.
Full article
(This article belongs to the Special Issue Responses of Crops to Abiotic Stress—2nd Edition)
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Open AccessArticle
Silvicultural and Ecological Characteristics of Populus bolleana Lauche as a Key Introduced Species in the Urban Dendroflora of Industrial Cities
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Vladimir Kornienko, Valeriya Reuckaya, Alyona Shkirenko, Besarion Meskhi, Anastasiya Olshevskaya, Mary Odabashyan, Victoria Shevchenko and Svetlana Teplyakova
Plants 2025, 14(13), 2052; https://doi.org/10.3390/plants14132052 - 4 Jul 2025
Abstract
In this work, we evaluated the silvicultural and ecological parameters of Populus bolleana Lauche trees growing in conditions of anthropogenic pollution, using the example of one of the largest megacities of the Donetsk ridge, the city of Donetsk. The objectives of this study
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In this work, we evaluated the silvicultural and ecological parameters of Populus bolleana Lauche trees growing in conditions of anthropogenic pollution, using the example of one of the largest megacities of the Donetsk ridge, the city of Donetsk. The objectives of this study included determining the level of anthropogenic load of the territory; conducting dendrological studies to assess morphometric and allometric parameters, age structure, and condition of P. bolleana stands under the influence of environmental factors; as well as completing biomechanical studies to assess and predict the mechanical stability of stands. A total of 1109 plants growing in areas with increased anthropogenic load and in the control areas were studied. The model territories of the study were located in the city of Donetsk on Fallen Communards Avenue (length of field routes: 2.6 km) and Ilyicha Avenue (length of field routes: 9.7 km). Control plantings grew on the territory of the Donetsk botanical garden and residential (dormitory) districts of the city. The age structure of P. bolleana plantations remained uniform throughout the city for 50–55 years due to the fact that the landscaping was under a single state program. In the steppe zone in the south of the East European Plain, with a high level of anthropogenic load and severe natural climatic factors, the critical age of P. bolleana (55 years) was determined. The condition of plantations and their morphometric indices correlate with the level of anthropogenic load of the city (H, Dbase, DBH). Under control conditions, the plants are in good condition with signs of weakening (2 points). Under conditions of increased anthropogenic load, the plants are in a severely weakened condition (3 points). A total of 25% of the plants in the sample are in critical condition (4–5 points). The main damages to the crowns and trunks of plants include core rot, mechanical damage to bark and tissues, the development of core rot through the affected skeletal branch, crown thinning, and drying. P. bolleana trees are valued for their crown area and ability to retain dust particles from the air. The analysis of experimentally obtained data on the crown area showed that in the initial phases of ontogenesis, the average deviation in the crown area of plants does not depend on the place of growth. Due to artificial narrowing and sanitary pruning of the crown, as well as skeletal branches dying along the busiest highways, the values do not exceed 22–23 m2 on average, with an allometric coefficient of 0.35–0.37. When comparing this coefficient in the control areas, the crown area in areas with a high level of anthropogenic load is 36 ± 11% lower. For trees growing under the conditions of the anthropogenic load of an industrial city and having reached the critical age, mechanical resistance varied depending on the study area and load level. At sites with a high level of pollution of the territory, a significant decrease in indicators was revealed in comparison with the control (mcr—71%, EI—75%, RRB—43%). Having analyzed all the obtained data, we can conclude that, until the age of 50–55 years, P. bolleana retains good viability, mechanical resistance, and general allometric ratios, upon which the stability of the whole plant depends. Even with modern approaches and tendencies toward landscaping with exotic introductions, it is necessary to keep P. bolleana as the main species in dendrobanocenoses.
Full article
(This article belongs to the Special Issue Plants for Biodiversity and Sustainable Cities)
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Open AccessReview
Dwarf Mistletoes (Arceuthobium, Viscaceae) of North America: Classification Systems, Phylogenetic Relationships, and Taxonomic Characteristics
by
Shawn C. Kenaley and Robert L. Mathiasen
Plants 2025, 14(13), 2051; https://doi.org/10.3390/plants14132051 - 4 Jul 2025
Abstract
Arceuthobium—the dwarf mistletoes—is a clearly defined genus of hemi-parasitic plants in the family Viscaceae. The genus occurs throughout much of the Northern Hemisphere; however, the greatest concentration of species and subspecies occurs within coniferous forests of western North America, where considerable research
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Arceuthobium—the dwarf mistletoes—is a clearly defined genus of hemi-parasitic plants in the family Viscaceae. The genus occurs throughout much of the Northern Hemisphere; however, the greatest concentration of species and subspecies occurs within coniferous forests of western North America, where considerable research was executed in the mid-to-late 20th century to determine their geographic distributions, host specializations, and taxonomic boundaries. However, the last monograph of Arceuthobium presenting morphological, phenological, phylogenetic, and physiological information for N. American dwarf mistletoes was published in 1996, and since that time, no subsequent publications have presented taxonomic information for the present classification of N. American Arceuthobium. Thus, herein, we provide updated phylogenetic and taxonomic data for 44 taxa of Arceuthobium indigenous to N. America while simultaneously addressing knowledge gaps and suggesting future research to improve our understanding of these ecologically and economically important forest tree parasites. The present classification systems for and recent treatments of N. American Arceuthobium are also discussed.
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(This article belongs to the Special Issue Taxonomy, Phylogeny and Distribution of Vascular Plants)
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Open AccessArticle
Rational Water and Nitrogen Regulation Can Improve Yield and Water–Nitrogen Productivity of the Maize (Zea mays L.)–Soybean (Glycine max L. Merr.) Strip Intercropping System in the China Hexi Oasis Irrigation Area
by
Haoliang Deng, Xiaofan Pan, Guang Li, Qinli Wang and Rang Xiao
Plants 2025, 14(13), 2050; https://doi.org/10.3390/plants14132050 - 4 Jul 2025
Abstract
The planting area of the maize–soybean strip intercropping system has been increasing annually in the Hexi Corridor oasis irrigation area of China. However, long-term irrational water resource utilization and the excessive mono-application of fertilizers have led to significantly low water and nitrogen use
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The planting area of the maize–soybean strip intercropping system has been increasing annually in the Hexi Corridor oasis irrigation area of China. However, long-term irrational water resource utilization and the excessive mono-application of fertilizers have led to significantly low water and nitrogen use efficiency in this cropping system. To explore the sustainable production model of high yield and high water–nitrogen productivity in maize–soybean strip intercropping, we established three irrigation levels (low: 60%, medium: 80%, and sufficient: 100% of reference crop evapotranspiration) and three nitrogen application levels (low: maize 230 kg ha−1, soybean 29 kg ha−1; medium: maize 340 kg ha−1, soybean 57 kg ha−1; and high: maize 450 kg ha−1, soybean 85 kg ha−1) for maize and soybean, respectively. Three irrigation levels without nitrogen application served as controls. The effects of different water–nitrogen combinations on multiple indicators of the maize–soybean strip intercropping system, including yield, water–nitrogen productivity, and quality, were analyzed. The results showed that the irrigation amount and nitrogen application rate significantly affected the kernel quality of maize. Specifically, the medium nitrogen and sufficient water (N2W3) combination achieved optimal performance in crude fat, starch, and bulk density. However, excessive irrigation and nitrogen application led to a reduction in the content of lysine and crude protein in maize, as well as crude fat and crude starch in soybean. Appropriate irrigation and nitrogen application significantly increased the yield in the maize–soybean strip intercropping system, in which the N2W3 treatment had the highest yield, with maize and soybean yields reaching 14007.02 and 2025.39 kg ha−1, respectively, which increased by 2.52% to 138.85% and 5.37% to 191.44% compared with the other treatments. Taking into account the growing environment of the oasis agricultural area in the Hexi Corridor and the effects of different water and nitrogen supplies on the yield, water–nitrogen productivity, and kernel quality of maize and soybeans in the strip intercropping system, the highest target yield can be achieved when the irrigation quotas for maize and soybeans are set at 100% ET0 (reference crop evapotranspiration), with nitrogen application rates of 354.78~422.51 kg ha−1 and 60.27~71.81 kg ha−1, respectively. This provides guidance for enhancing yield and quality in maize–soybean strip intercropping in the oasis agricultural area of the Hexi Corridor, achieving the dual objectives of high yield and superior quality.
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(This article belongs to the Special Issue Optimizing Resource Utilization in Intercropping and Sole Cropping Systems)
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Open AccessReview
Beyond Single-Pathogen Models: Understanding Mixed Infections Involving Phytoplasmas and Other Plant Pathogens
by
Shao-Shuai Yu and Wei Wei
Plants 2025, 14(13), 2049; https://doi.org/10.3390/plants14132049 - 4 Jul 2025
Abstract
Phytoplasmas are wall-less, phloem-restricted bacteria responsible for numerous significant plant diseases worldwide. An increasing body of evidence indicates that phytoplasmas can coexist with other pathogens in mixed infections, including various 16Sr group phytoplasmas, ‘Candidatus Liberibacter’ species, viruses, spiroplasmas, fungi, and other difficult-to-culture phloem-limited
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Phytoplasmas are wall-less, phloem-restricted bacteria responsible for numerous significant plant diseases worldwide. An increasing body of evidence indicates that phytoplasmas can coexist with other pathogens in mixed infections, including various 16Sr group phytoplasmas, ‘Candidatus Liberibacter’ species, viruses, spiroplasmas, fungi, and other difficult-to-culture phloem-limited bacteria. These interactions challenge established views regarding the causes, detection, and management of plant diseases. This review consolidates existing knowledge on the diversity and epidemiology of phytoplasma-related mixed infections, with a particular emphasis on documented co-infections across various host plants and regions, especially in tropical and subtropical areas. Mixed infections affect disease severity, symptom expression, vector behavior, and pathogen dissemination, highlighting the limitations of pathogen-specific diagnostic and control strategies. The necessity for tools to detect multiple pathogens, enhanced understanding of pathogen–pathogen and host–pathogen interactions, and comprehensive surveillance systems is emphasized. Ultimately, breeding for resistance must consider the complexities of natural co-infections to ensure effective protection of crops. Addressing the challenges presented by phytoplasma-related mixed infections is crucial for developing resilient and sustainable plant health strategies in the face of increasing ecological and agricultural pressures.
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(This article belongs to the Section Plant Protection and Biotic Interactions)
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Open AccessCommunication
Species Interactions Shape Nitrogen Utilization Characteristics and Influence Soil Quality in Jujube–Alfalfa Intercropping System
by
Hang Qiao, Hui Cheng, Tiantian Li, Wenxia Fan, Yaru Zhao, Zhengjun Cui, Jinbin Wang, Qingqing Yang, Chengze Jia, Wei Zhang, Guodong Chen and Sumei Wan
Plants 2025, 14(13), 2048; https://doi.org/10.3390/plants14132048 - 3 Jul 2025
Abstract
Intercropping legumes offers a sustainable approach to enhance resource efficiency and yields, yet the effects of different legume densities and nitrogen addition levels on soil quality within such systems remain unclear. We conducted a comparative analysis of crop yield, nitrogen use efficiency, and
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Intercropping legumes offers a sustainable approach to enhance resource efficiency and yields, yet the effects of different legume densities and nitrogen addition levels on soil quality within such systems remain unclear. We conducted a comparative analysis of crop yield, nitrogen use efficiency, and soil quality between intercropping and monoculture systems, and further examined the effects of four planting densities (D1: 210 kg ha−1, six rows; D2: 280 kg ha−1, eight rows; D3: 350 kg ha−1, ten rows) and four nitrogen application levels (N0: 0 kg ha−1; N1: 80 kg ha−1; N2: 160 kg ha−1; N3: 240 kg ha−1) within a jujube–alfalfa (Ziziphus jujuba Mill. and Medicago sativa L. respectively) intercropping system. The results showed that intercropping significantly enhanced land productivity within the agricultural system, with the highest yields (alfalfa: 13790 kg ha−1; jujube: 3825 kg ha−1) achieved at an alfalfa planting density of 280 kg ha−1. While the intercropping systems generally improved productivity, an alfalfa planting density of 350 kg ha−1 resulted in an actual yield loss due to excessive nutrient competition at higher densities. As the planting density of alfalfa increased, its competitive ratio declined, whereas the competitive ratio of jujube trees increased. Compared to monocropping systems, intercropping systems demonstrated a clear trend of enhanced nitrogen utilization efficiency and improved soil quality, particularly at an alfalfa planting density of 280 kg ha−1. At an alfalfa density of 280 kg ha−1, the intercropping system exhibited increases of 15.13% in nitrogen use efficiency (NUE), 46.60% in nitrogen partial factor productivity (NPFP), and 32.74% in nitrogen nutrition index (NNI), as well as improvements in soil quality of 19.53% at a depth of 0–20 cm and 15.59% at a depth of 20–40 cm, compared to the monoculture system. Further analysis revealed that nitrogen utilization efficiency initially increased and then decreased with a rising competitive ratio of alfalfa. Accordingly, soil quality was improved along with the enhanced nitrogen utilization efficiency. Thus, at an alfalfa planting density of 280 kg ha−1, resource use efficiency and soil quality were maximized as a result of optimal interspecific competitiveness and the highest nitrogen use efficiency, with minimal influence from the application of nitrogen fertilizer.
Full article
(This article belongs to the Special Issue Nutrient Efficiency in Crop Production: Physiological Strategies to Enhance Yields)
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Open AccessArticle
Unveiling the Pharmacognostic Potential of Peucedanum ostruthium (L.) W.D.J. Koch: A Comparative Study of Rhizome and Leaf Essential Oils
by
Cristina Danna, Andrea Mainetti, Souda Belaid, Erminia La Camera, Domenico Trombetta, Laura Cornara and Antonella Smeriglio
Plants 2025, 14(13), 2047; https://doi.org/10.3390/plants14132047 - 3 Jul 2025
Abstract
Peucedanum ostruthium (L.) W.D.J. Koch (Apiaceae) is a perennial herb native to alpine regions that is renowned in traditional medicine. This study provided a pharmacognostic evaluation, comparing the EOs obtained from its rhizomes and leaves (REO and LEO, respectively). A micromorphological analysis, which
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Peucedanum ostruthium (L.) W.D.J. Koch (Apiaceae) is a perennial herb native to alpine regions that is renowned in traditional medicine. This study provided a pharmacognostic evaluation, comparing the EOs obtained from its rhizomes and leaves (REO and LEO, respectively). A micromorphological analysis, which was carried out using fluorescence and scanning electron microscopy, revealed terpenoid-rich secretory ducts in both organs. The EOs were extracted by hydrodistillation and characterized by gas chromatography, coupled with flame ionization detection and mass spectrometry (GC-FID and GC-MS), revealing distinct chemical profiles. REO was dominated by monoterpenes (80.08%), especially D-limonene (29.13%), sabinene (19.77%), and α-phellandrene (12.02%), while LEO was sesquiterpene-rich (81.15%), with β-caryophyllene (21.78%), β-selinene (14.09%), and germacrene D (10.43%) as the major compounds. The in vitro assays demonstrated that both EOs exhibit significant antioxidant and anti-inflammatory activities, with LEO consistently outperforming REO across all tests. However, neither EO showed antimicrobial effects against common bacterial or fungal strains. This may have been due to the absence of polar antimicrobial constituents, such as coumarins, which are poorly recovered by hydrodistillation. To fully exploit the therapeutic potential of P. ostruthium, especially its antimicrobial properties, future studies should aim to develop integrated formulations combining volatile and non-volatile fractions, preserving the complete plant complex and broadening bioactivity.
Full article
(This article belongs to the Special Issue Innovations in Isolation and Characterization of Bioactive Compounds from Medicinal Plants)
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Open AccessArticle
Soil Drenching with Wood Distillate Modifies the Nutritional Properties of Chickpea (Cicer arietinum L.) Seeds by Increasing the Protein Content and Inducing Targeted Changes in the Proteomic Profile
by
Rossana De Salvo, Riccardo Fedeli, Alfonso Carleo, Luca Bini, Stefano Loppi and Laura Bianchi
Plants 2025, 14(13), 2046; https://doi.org/10.3390/plants14132046 - 3 Jul 2025
Abstract
The production of food with a naturally enriched protein content is a strategic response to the growing global demand for sustainable protein sources. Wood distillate (WD), a by-product of the pyrolysis of woody biomass, has previously been shown to increase the protein concentration
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The production of food with a naturally enriched protein content is a strategic response to the growing global demand for sustainable protein sources. Wood distillate (WD), a by-product of the pyrolysis of woody biomass, has previously been shown to increase the protein concentration and bioavailability in chickpea seeds. Here, we evaluated the effect of 0.5% (v/v) WD soil drenching on chickpea productivity, nutritional profile, and proteomic pattern. WD treatment significantly improved the yield by increasing plant biomass (+144%), number of pods and seeds (+148% and +147%), and seed size (diameter: +6%; weight: +25%). Nutritional analyses revealed elevated levels of soluble proteins (+15%), starch (+11%), fructose (+135%), and polyphenols (+14%) and a greater antioxidant capacity (25%), alongside a reduction in glucose content, albeit not statistically significant, suggesting an unchanged or even lowered glycemic index. Although their concentration decreased, Ca (−31%), K (−12%), P (−5%), and Zn (−14%) in WD-treated plants remained within normal ranges. To preliminary assess the quality and safety of the protein enrichment, a differential proteomic analysis was performed on coarse flours from individual seeds. Despite the higher protein content, the overall protein profiles of the WD-treated seeds showed limited variation, with only a few storage proteins, identified as legumin and vicilin-like isoforms, being differentially abundant. These findings indicate a general protein concentration increase without a major alteration in the proteoform composition or differential protein synthesis. Overall, WD emerged as a promising and sustainable biostimulant for chickpea cultivation, capable of enhancing both yield and nutritional value, while maintaining the proteomic integrity and, bona fide, food safety.
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(This article belongs to the Special Issue Bio-Based Solutions for Sustainable Plant Systems)
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Open AccessArticle
High Ratio of Manure Substitution Enhanced Soil Organic Carbon Storage via Increasing Particulate Organic Carbon and Nutrient Availability
by
Xiaoyu Hao, Xingzhu Ma, Lei Sun, Shuangquan Liu, Jinghong Ji, Baoku Zhou, Yue Zhao, Yu Zheng, Enjun Kuang, Yitian Liu and Shicheng Zhao
Plants 2025, 14(13), 2045; https://doi.org/10.3390/plants14132045 - 3 Jul 2025
Abstract
Replacing partial chemical fertilizers with organic fertilizer can increase organic carbon input, change soil nutrient stoichiometry and microbial metabolism, and then affect soil organic carbon (SOC) storage. A 6-year field experiment was used to explore the mechanism of SOC storage under different ratios
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Replacing partial chemical fertilizers with organic fertilizer can increase organic carbon input, change soil nutrient stoichiometry and microbial metabolism, and then affect soil organic carbon (SOC) storage. A 6-year field experiment was used to explore the mechanism of SOC storage under different ratios of manure substitution in northeast China, with treatments including chemical fertilizer application alone (nitrogen, phosphorus, and potassium, NPK) and replacing 1/4 (1/4M), 2/4 (2/4M), 3/4 (3/4M), and 4/4 (4/4M) of chemical fertilizer N with manure N. Soil nutrients, enzymatic activity, and SOC fractions were analyzed to evaluate the effect of different manure substitution ratios on SOC storage. A high ratio of manure substitution (>1/4) significantly increased soil total N, total P, total K, and available nutrients (NO3−-N, available P, and available K), and the 4/4M greatly decreased the C/N ratio compared to the NPK. Manure incorporation increased microbial biomass carbon (MBC) by 18.3–53.0%. Treatments with 50%, 75%, and 100% manure substitution (2/4M, 3/4M, and 4/4M) enhanced bacterial necromass carbon (BNC), fungal necromass carbon (FNC), and total microbial necromass carbon (MNC) by 31.9–63.5%, 25.5–107.1%, and 27.4–94.2%, respectively, compared to the NPK treatment. Notably, the increase in FNC was greater than that of BNC as the manure substitution ratio increased. The increasing manure substitution significantly enhanced particulate organic C (POC) and total SOC but did not affect mineral-associated organic C (MAOC). High soil N and P supplies decreased leucine aminopeptidases (LAPs) and alkaline phosphatase activities but increased the activity ratio of β-glucosidase (BG)/(N-acetyl-glucosaminidase (NAG) + LAP). Treatments with 25% manure substitution (1/4M) maintained maize and soybean yield, but with increasing manure rate, the maize yield decreased gradually. Overall, the high ratio of manure substitution enhanced SOC storage via increasing POC and MNC, and decreasing the decomposition potential of manure C and soil C resulting from low N- and P-requiring enzyme activities under high nutrient supplies. This study provides empirical evidence that the rational substitution of chemical fertilizers with manure is an effective measure to improve the availability of nutrients, and its effect on increasing crop yields still needs to be continuously observed, which is still a beneficial choice for enhancing black soil fertility.
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(This article belongs to the Special Issue Management of Soil Fertility and Plant Nutrition for Improved Crop Production)
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Open AccessArticle
Phosphorylation of Plant Ferredoxin-like Protein Is Required for Intensifying PAMP-Triggered Immunity in Arabidopsis thaliana
by
Tzu-Yi Chen, Rui-Wen Gong, Bo-Wei Chen and Yi-Hsien Lin
Plants 2025, 14(13), 2044; https://doi.org/10.3390/plants14132044 - 3 Jul 2025
Abstract
The immune response triggered when plant cell surface receptors recognize pathogen-associated molecular patterns (PAMPs) is known as PAMP-triggered immunity (PTI). Several studies have demonstrated that extracellular plant ferredoxin-like protein (PFLP) can enhance PTI signaling, thereby conferring resistance to bacterial diseases in various plants.
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The immune response triggered when plant cell surface receptors recognize pathogen-associated molecular patterns (PAMPs) is known as PAMP-triggered immunity (PTI). Several studies have demonstrated that extracellular plant ferredoxin-like protein (PFLP) can enhance PTI signaling, thereby conferring resistance to bacterial diseases in various plants. The C-terminal casein kinase II (CK2) phosphorylation region of PFLP is essential for strengthening PTI. However, whether phosphorylation at this site directly enhances PTI signaling and consequently increases plant disease resistance remains unclear. To investigate this, site-directed mutagenesis was used to generate PFLPT90A, a non-phosphorylatable mutant, and PFLPT90D, a phospho-mimetic mutant, for functional analysis. Based on the experimental results, none of the recombinant proteins were able to enhance the hypersensitive response induced by the HrpN protein or increase resistance to the soft rot pathogen Pectobacterium carotovorum subsp. carotovorum ECC17. These findings suggest that phosphorylation at the T90 residue might be essential for PFLP-mediated enhancement of plant immune responses, implying that this post-translational modification is likely required for its disease resistance function in planta. To further explore the relationship between PFLP phosphorylation and endogenous CK2, the Arabidopsis insertion mutant cka2 and the complemented line CKA2R were analyzed under treatment with flg22Pst from Pseudomonas syringae pv. tomato. The effects of PFLP on the hypersensitive response, rapid oxidative burst, callose deposition, and susceptibility to soft rot confirmed that CK2 is required for these immune responses. Furthermore, expression analysis of PTI-related genes FRK1 and WRKY22/29 in the mitogen-activated protein kinase (MAPK) signaling pathway demonstrated that CK2 is necessary for PFLP to enhance flg22Pst-induced immune signaling. Taken together, these findings suggest that PFLP enhances A. thaliana resistance to bacterial soft rot primarily by promoting the MAPK signaling pathway triggered by PAMP recognition, with CK2-mediated phosphorylation being essential for its function.
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(This article belongs to the Special Issue Plant Immunity and Disease Resistance Mechanisms)
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Open AccessArticle
Mosaic Evolution of Membrane Transporters in Galdieriales
by
Claudia Ciniglia, Antonino Pollio, Elio Pozzuoli, Marzia Licata, Nunzia Nappi, Seth J. Davis and Manuela Iovinella
Plants 2025, 14(13), 2043; https://doi.org/10.3390/plants14132043 - 3 Jul 2025
Abstract
Membrane transporters are vital for solute movement and localisation across cellular compartments, particularly in extremophilic organisms such as Galdieriales. These red algae thrive in geothermal and metal-rich environments, where adaptive transporter systems contribute to their metabolic flexibility. While inventories of transporter genes in
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Membrane transporters are vital for solute movement and localisation across cellular compartments, particularly in extremophilic organisms such as Galdieriales. These red algae thrive in geothermal and metal-rich environments, where adaptive transporter systems contribute to their metabolic flexibility. While inventories of transporter genes in the species Galdieria sulphuraria have previously been compiled, their phylogenetic origins remain incompletely resolved. Here, we conduct a comparative phylogenetic analysis of three transporter families—Major Facilitator Superfamily (MFS). Amino acid–Polyamine–Organocation (APC) and the natural resistance–associated macrophage protein (Nramp)—selected from overexpressed transcripts in G. sulphuraria strain SAG 107.79. Using sequences from six Galdieriales species and orthologs from diverse taxa, we reconstructed maximum likelihood trees to assess conservation and potential horizontal gene transfer (HGT). The MFS subfamilies revealed contrasting patterns: sugar porters (SPs) exhibited polyphyly and fungal affinity, suggesting multiple HGT events, while phosphate:H+ symporters (PHSs) formed a coherent monophyletic group. APC sequences were exclusive in G. sulphuraria and extremophilic prokaryotes, indicating a likely prokaryotic origin. In contrast, Nramp transporters were broadly conserved across eukaryotes and prokaryotes, showing no signs of recent HGT. Together, these findings highlight the mosaic evolutionary history of membrane transporters in Galdieriales, shaped by a combination of vertical inheritance and taxon-specific gene acquisition events, and provide new insight into the genomic strategies underpinning environmental resilience in red algae.
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(This article belongs to the Section Plant Molecular Biology)
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Open AccessArticle
Identification and Quantification of Anthocyanins in Various Organs of Potato Varieties (Solanum tuberosum L.) as Potential Visual Selection Markers During Breeding
by
Irina V. Kim, Muhammad A. Nawaz, Dmitry I. Volkov, Aleksey G. Klykov, Mayya P. Razgonova and Kirill S. Golokhvast
Plants 2025, 14(13), 2042; https://doi.org/10.3390/plants14132042 - 3 Jul 2025
Abstract
Phenolic compounds, which are a large group of plant pigments, are recognized as important antioxidants. The potato (Solanum tuberosum L.), particularly the pigmented varieties, could be a source of natural anthocyanins for producing dietary foods. In this study, we analyzed forty potato
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Phenolic compounds, which are a large group of plant pigments, are recognized as important antioxidants. The potato (Solanum tuberosum L.), particularly the pigmented varieties, could be a source of natural anthocyanins for producing dietary foods. In this study, we analyzed forty potato specimens from our germplasm collection and breeding nurseries using high-performance liquid chromatography (HPLC) and second-order mass spectrometry to identify anthocyanins. We found seven main anthocyanins in potato tubers: delphinidin-3-glucoside, delphinidin-3-rhamnosyl-5-glucoside, petunidin-3-glucoside, malvidin-3-glucoside, cyanidin-3-glucoside, cyanidin-3-rhamnosyl-5-glucoside, and pelargonidin-3-glucoside. Two anthocyanins were found in potato inflorescences: peonidin-3-coumaroyl glucoside and cyanidin-3-coumaroyl glucoside. On average, varieties from the group with red-purple inflorescences contained 187.6 mg/kg of anthocyanins. Genotypes with white corollas had an anthocyanin content below 0.5 mg/kg or between 1.3 and 3.6 mg/kg. Two potato varieties, Vasilek (605.2 mg/kg) and Fioletovyi (501.1 mg/kg), with blue-purple corollas, had the highest total anthocyanin content. Studying the anthocyanin profile of leaves allowed us to identify eleven anthocyanins. The highest anthocyanin content (331.3 mg/kg) was found in varieties with purple or blue-purple tubers, while the lowest content (an average of 15.1 mg/kg) was found in varieties with yellow or cream tubers. Genotypes with purple and blue-purple tuber skin had an average anthocyanin content of 190.7 mg/kg. The group with yellow and cream tubers had an insignificant anthocyanin content (1.2 mg/kg). Varieties from the group with pink tubers had an average anthocyanin content of 43.2 mg/kg. Thus, this study identified diagnostic traits that could be used to assess the morphological characteristics of potato genotypes.
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(This article belongs to the Special Issue Characterization and Conservation of Vegetable Genetic Resources)
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Open AccessArticle
Optimized Extraction, Comprehensive Chemical Profiling, and Antioxidant Evaluation of Volatile Oils from Wurfbainia villosa (Lour.) Škorničk. & A.D.Poulsen Leaves
by
Yuancong Gu, Bangyu Lv, Xingrui Nian, Xinrui Xie and Xinhe Yang
Plants 2025, 14(13), 2041; https://doi.org/10.3390/plants14132041 - 3 Jul 2025
Abstract
This study employed cellulase-assisted hydrodistillation (cellulase-HD) to extract volatile oils from Wurfbainia villosa (Lour.) Škorničk. & A.D.Poulsen (W. villosa) leaves, with process optimization conducted via the response surface methodology (RSM). The optimized extraction parameters were as follows: enzyme dosage 2.2%, enzymatic hydrolysis temperature
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This study employed cellulase-assisted hydrodistillation (cellulase-HD) to extract volatile oils from Wurfbainia villosa (Lour.) Škorničk. & A.D.Poulsen (W. villosa) leaves, with process optimization conducted via the response surface methodology (RSM). The optimized extraction parameters were as follows: enzyme dosage 2.2%, enzymatic hydrolysis temperature 49 °C, hydrolysis duration 73 min, and material/liquid ratio (1:10.7 mg/mL). Under these optimal conditions, the volatile oil yield reached 0.772%, representing a 31.29% increase compared to conventional hydrodistillation (HD). GC-MS analysis identified 54 and 49 volatile compounds in cellulase-HD and HD extracts, respectively, with 39 shared components. The cellulase-HD extract was predominantly composed of γ-terpinene (14.981%), limonene (13.352%), β-phellandrene (10.634%), 4-terpineol (10.145%), and α-terpineol (8.085%). In contrast, the HD extract showed higher contents of β-phellandrene (41.881%), followed by β-myrcene (8.656%) and limonene (8.444%). Notably, cellulase pretreatment significantly increased the yield of oxygenated compounds. Orthogonal partial least squares discriminant analysis (OPLS-DA) revealed substantial compositional differences between the two extraction methods, with key differential components including fenchol, borneol, and γ-elemene. Antioxidant activity assessment demonstrated superior free radical scavenging capacity in cellulase-HD extracts. Structure–activity relationship analysis identified seven compounds with DPPH radical scavenging rates >50%, particularly, epi-bicyclosesquiphellandrene (71.51%) and γ-elemene (78.91%). Furthermore, thirteen components, including isopinocamphone (66.58%) and α-terpineol (66.95%), exhibited ABTS radical scavenging rates above 50%. This study provides theoretical and technical foundations for the extraction and functional development of volatile oils from W. villosa leaves.
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(This article belongs to the Section Phytochemistry)
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Environmental Drivers of Trace Element Variability in Hypnum cupressiforme Hedw.: A Cross-Regional Moss Biomonitoring Study in Georgia and the Republic of Moldova
by
Omari Chaligava, Inga Zinicovscaia and Liliana Cepoi
Plants 2025, 14(13), 2040; https://doi.org/10.3390/plants14132040 - 3 Jul 2025
Abstract
This study investigates the influence of environmental variables on the elemental composition of Hypnum cupressiforme Hedw. mosses in Georgia and the Republic of Moldova, within moss biomonitoring studies aimed at analyzing atmospheric deposition patterns. Moss samples of Hypnum cupressiforme, characterized by a
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This study investigates the influence of environmental variables on the elemental composition of Hypnum cupressiforme Hedw. mosses in Georgia and the Republic of Moldova, within moss biomonitoring studies aimed at analyzing atmospheric deposition patterns. Moss samples of Hypnum cupressiforme, characterized by a cosmopolitan distribution and a wide range of habitats, were collected from diverse geographical and climatic zones and analyzed for Al, Ba, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, Sr, V, and Zn. Statistical methods (Spearman correlations, PCA, Kruskal–Wallis tests) were applied to evaluate interactions between elemental concentrations and factors such as topography, climate, land cover, etc. Results revealed strong correlations among lithogenic elements (Al, Co, Cr, Fe, Ni, and V), indicating natural weathering sources, while Cu exhibited potential anthropogenic origins in the Republic of Moldova. Elevated Cd and Pb levels in Georgian high-altitude regions were linked to wet deposition and steep slopes, whereas Moldovan samples showed higher Sr and Zn concentrations, likely driven by soil erosion in carbonate chernozems. The study highlights geogenic and climatic influences on element accumulation by moss, offering insights into the effectiveness of moss biomonitoring across heterogeneous landscapes.
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(This article belongs to the Special Issue Urban Forests, Parks, and Plants as Biomonitoring Pools for Air Pollution)
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Open AccessArticle
Assessment of the Status of Cephalanthera longifolia Populations in Lithuania Derived from a Single-Census Study
by
Laurynas Taura and Zigmantas Gudžinskas
Plants 2025, 14(13), 2039; https://doi.org/10.3390/plants14132039 - 3 Jul 2025
Abstract
The study of plant demography is important for identifying ongoing population processes and trends. While single-census studies have limited ability to capture long-term dynamics, they are crucial for establishing baseline data on the status of plant populations. In 2022, four populations of Cephalanthera
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The study of plant demography is important for identifying ongoing population processes and trends. While single-census studies have limited ability to capture long-term dynamics, they are crucial for establishing baseline data on the status of plant populations. In 2022, four populations of Cephalanthera longifolia (Orchidaceae) in Lithuania were studied using a standardised sampling plot method. Within each population, 20 plots were established along a transect. All plant species within each plot were recorded, and their coverage was estimated. Additionally, the height of the plants, the cover of plant debris, and the amount of bare soil in the sampling plot were assessed. Vegetative individuals of C. longifolia were dominant across all populations, comprising between 58.7% and 85.1% of all individuals. Combining data from all populations revealed that vegetative individuals accounted for 71.8% of the total population, while generative individuals accounted for the remaining 28.2%. The mean density of individuals in the studied populations ranged from 3.8 ± 2.3 to 11.1 ± 4.3 individuals per square metre. A comparison of plant traits (plant height, inflorescence length, number of flowers in inflorescence, number of fruits set, and number of leaves) was performed between populations. Increased cover of plant debris was found to have the strongest negative effect on the number of individuals. We believe that the demographic type of a population (dynamic, normal or regressive) should be assessed in the context of the life cycle of certain species and their ecological traits, rather than mechanistically. Under reduced light availability, most individuals remained in a vegetative state. Therefore, the ratio of generative to vegetative individuals reflects current habitat conditions rather than long-term population trends.
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(This article belongs to the Section Plant Ecology)
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