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Agriculture
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New Insights into Crop Response and Tolerance to Salinity Stress
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New Insights into Crop Response and Tolerance to Salinity Stress

A special issue of Agriculture (ISSN 2077-0472). This special issue belongs to the section "Crop Production".

Deadline for manuscript submissions: closed (20 September 2023) | Viewed by 3937

Special Issue Editors

Prof. Dr. Geovani Soares de Lima

E-Mail Website
Guest Editor
Universidade Federal de Campina Grande-UFCG, Programa de Pós-Graduação em Engenharia Agrícola, Campus Campina Grande, Campina Grande, PB, Brazil
Interests: tolerance mechanisms; salt stress; oxidative stress; irrigation; ionic interactions
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Hans Raj Gheyi

E-Mail Website
Guest Editor
Academic Unit of Agricultural Engineering, Universidade Federal de Campina Grande, Campina Grande, PB, Brazil
Interests: soil/water salinity; wastewater reuse; reclamation; biosaline agriculture; tolerance of fruit crops
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

With the expansion of population growth in recent decades, associated with the advancement of areas affected by salts in various regions of the world, one of the most imperative challenges of modern agriculture is the search for strategies for managing soil and water salinity, especially in arid and semiarid regions, as a way of ensuring food security. Thus, the successful use of brackish water for irrigation of crops or cultivation in areas with salinity and/or sodicity problems requires adequate management practices, such as the selection of salt-tolerant crops. This issue on “Crop Response and Tolerance to Salt Stress” will include studies on the effects of salts on plants, mechanisms of tolerance, crop tolerance associated with ionic relationships, physiological and biochemical responses to salt stress, osmotic, ionic, and biochemical homeostasis, and the related biomolecular mechanisms with salt stress tolerance. In this issue, original research manuscripts, short communications, and reviews are welcome. Manuscripts submitted to Agriculture must not have been previously published or be under consideration for publication in another journal.

Prof. Dr. Geovani Soares de Lima
Prof. Dr. Hans Raj Gheyi
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Agriculture is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • tolerance
  • oxidative stress
  • nutritional imbalances
  • physiology
  • biochemistry

Published Papers (2 papers)

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Research

20 pages, 7092 KiB  
Article
Influence of Incremental Short Term Salt Stress at the Seedling Stage on Root Plasticity, Shoot Thermal Profile and Ion Homeostasis in Contrasting Wheat Genotypes
by Jagadhesan Boopal, Lekshmy Sathee, Ramesh Ramasamy, Rakesh Pandey and Viswanathan Chinnusamy
Agriculture 2023, 13(10), 1946; https://doi.org/10.3390/agriculture13101946 - 6 Oct 2023
Viewed by 1081
Abstract
Understanding the component traits determining salt stress tolerance is a major breeding target in wheat. The lack of genetic resources suited to salt-affected regions and the complexity of the traits involved impede progress in breeding salt-tolerant wheat varieties. This study was conducted with [...] Read more.
Understanding the component traits determining salt stress tolerance is a major breeding target in wheat. The lack of genetic resources suited to salt-affected regions and the complexity of the traits involved impede progress in breeding salt-tolerant wheat varieties. This study was conducted with four bread wheats, namely (Triticum aestivum) Kharchia-65 (K-65), BT-Schomburgk (BTS), HD-2687, and HD-3298. Treatments were imposed on plants with varying electrical conductivity (control, 5 dS m−1, 10 dS m−1, and 15 dS m−1) with a combination of three different salts NaCl, CaCl2·2H2O, and Na2SO4. We evaluated variations in root system architecture, canopy temperature (depicted as a thermal image), reactive oxygen species (ROS) homeostasis, and leaf stomatal density in response to incremental doses of salt stress in a hydroponic experiment. As the plants were sampled after short-term exposure to stress (within 3 weeks of stress imposition), the plants were expected to be in a quiescent state. Due to the osmotic effect, the growth of the plants was compromised, and the associated decrease in stomatal conductance increased the canopy temperature. ROS accumulation and antioxidant enzyme activity did not follow a definite pattern. The antioxidant system’s tolerance to ROS comes into action much later in the tolerance mechanism. That could probably be the reason behind the varied response in ROS accumulation and antioxidant enzymes after short-term exposure to salt stress. Thermal images could effectively differentiate between salt-tolerant (K65) and sensitive (HD2687) genotypes. The variation in Na+/K+ ratio also suggested a genotypic variation in salt tolerance. The genotypes of K-65 maintained a better root system, while HD2687 showed severe reduction in root biomass and other root traits under salt stress. The PCA data also point out genotypic variation in lateral and main root traits in response to different salt stress levels. For salt tolerance in wheat, the main contributing root traits were total root length, total surface area, total root volume, tips, and other main, lateral root traits. The idea of differential control of RSA dynamics is novel and can be further explored to understand natural variation in salt stress tolerance. Full article
(This article belongs to the Special Issue New Insights into Crop Response and Tolerance to Salinity Stress)
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24 pages, 11847 KiB  
Article
Salicylic Acid Modulates Okra Tolerance to Salt Stress in Hydroponic System
by Allysson Jonhnny Torres Mendonça, André Alisson Rodrigues da Silva, Geovani Soares de Lima, Lauriane Almeida dos Anjos Soares, Valeska Karolini Nunes Oliveira, Hans Raj Gheyi, Claudivan Feitosa de Lacerda, Carlos Alberto Vieira de Azevedo, Vera Lúcia Antunes de Lima and Pedro Dantas Fernandes
Agriculture 2022, 12(10), 1687; https://doi.org/10.3390/agriculture12101687 - 13 Oct 2022
Cited by 14 | Viewed by 2338
Abstract
Salinity is one of the most devastating abiotic stresses that limit plant growth and yield, especially in arid and semi-arid regions. The objective of this study was to evaluate the effect of foliar application of salicylic acid in mitigating the effects of salt [...] Read more.
Salinity is one of the most devastating abiotic stresses that limit plant growth and yield, especially in arid and semi-arid regions. The objective of this study was to evaluate the effect of foliar application of salicylic acid in mitigating the effects of salt stress on okra cultivation in a hydroponic system. The study was conducted in a greenhouse, consisting of two experiments. A completely randomized design was adopted in a split-plot scheme, with four levels of electrical conductivity of the nutrient solution—EC (2.1; 3.6; 5.1, and 6.6 dS m−1) considered the plots and four salicylic acid concentrations—SA (0, 1.2; 2.4, and 3.6 mM), the subplots, with four replications. The second experiment differed from the first only by the increase in the EC levels (3.0, 5.0, 7.0, and 9.0 dS m−1). An increase in the electrical conductivity of the nutrient solution negatively affected the physiology and production components of okra. However, foliar application of salicylic acid at concentrations between 1.2 and 2.3 mM reduced the harmful effects of salt stress. The salinity threshold for hydroponic cultivation of okra was 2.54 dS m−1, with a reduction of 7.98% per unit increment in EC above this level. Full article
(This article belongs to the Special Issue New Insights into Crop Response and Tolerance to Salinity Stress)
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