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Horticulturae
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Biostimulants and Plant Elicitors to Mitigate the Effect of Biotic...
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Biostimulants and Plant Elicitors to Mitigate the Effect of Biotic and Abiotic Stress, Volume II

A special issue of Horticulturae (ISSN 2311-7524). This special issue belongs to the section "Biotic and Abiotic Stress".

Deadline for manuscript submissions: 30 June 2024 | Viewed by 1165

Special Issue Editors

Dr. Begoña Miras-Moreno

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Guest Editor
Department of Vegetal Biology, University of Murcia, 30100 Murcia, Spain
Interests: abiotic stress; phytohormones; secondary metabolism; biostimulants; plant biochemistry
Special Issues, Collections and Topics in MDPI journals
Dr. Esther Novo-Uzal

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Guest Editor
Centro de Biotecnología y Genómica de Plantas (UPM – INIA/CSIC), 28223 Madrid, Spain
Interests: abiotic stress; plant biochemistry; plant evolution; oxidative stress; secondary metabolism; RNA regulation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Plant biostimulants are substance(s) and/or microorganisms applied to the plants or the rhizosphere with the aim of enhancing nutrition efficiency or product quality of crops, independently from the plant nutrient content. In the last decade, the use of biostimulants has been on the rise due to the increasing awareness of the need to promote sustainable agriculture worldwide. In addition to their role in enhancing plant performance, biostimulants can also help plants to cope with abiotic stress. Along these lines, it is known that plant elicitors can increase plant tolerance to biotic stresses.

This Special Issue aims to shed light on the morphological, physiological, and biochemical processes triggered by the application of biostimulants and plant elicitors, ultimately leading to an increase in biotic and abiotic stress tolerance. Particular attention will be paid to the mechanisms that can be used to tackle increasingly frequent environmental stresses derived from climate change. We welcome authors to submit studies focused on these issues.

Dr. Begoña Miras-Moreno
Dr. Esther Novo-Uzal
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. Horticulturae 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 2200 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

  • biostimulants
  • elicitors
  • abiotic stress
  • biotic stress
  • secondary metabolism
  • climate change

Published Papers (2 papers)

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Research

13 pages, 1866 KiB  
Communication
N-Acetylglutamic Acid Enhances Tolerance to Oxidative and Heat Stress in Humulus lupulus
by Takeshi Hirakawa and Kazuaki Ohara
Horticulturae 2024, 10(5), 484; https://doi.org/10.3390/horticulturae10050484 - 8 May 2024
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Abstract
Humulus lupulus (hop) is a necessary material in beer brewing because its female inflorescences (called hop cones) give a floral aroma, bitterness and foam stability to beer. Various aspects of growth conditions in the cultivation area, especially temperature, strongly affect the yield and [...] Read more.
Humulus lupulus (hop) is a necessary material in beer brewing because its female inflorescences (called hop cones) give a floral aroma, bitterness and foam stability to beer. Various aspects of growth conditions in the cultivation area, especially temperature, strongly affect the yield and quality of hop cones. Recent estimates suggest that climate change accompanied by global warming is negatively impacting hop production, with high temperatures reducing the expression of genes that regulate beneficial secondary metabolites in hops. This underscores the need for techniques to enhance hop tolerance to high temperatures. This study explores the potential of N-acectylglutamic acid (NAG), a non-proteinogenic amino acid, to confer hops with tolerance against oxidative and heat stress by suppressing ROS accumulation. Exogenous NAG treatment activated the expression of HlZAT10/12 and HlHSFA2, which are putative homologues considered master regulators in response to oxidative and heat stress in Arabidopsis thaliana (Arabidopsis). Additionally, histone acetylation, a histone modification associated with transcriptional activation, was increased at these stress-responsive genes in the NAG-treated hops. These findings reveal NAG as a potential chemical compound to mitigate hop production reduction caused by high temperatures and suggest the conservation of epigenetic modification-mediated regulation of gene expression in response to environmental stresses in hops. Full article
(This article belongs to the Special Issue Biostimulants and Plant Elicitors to Mitigate the Effect of Biotic and Abiotic Stress, Volume II)
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16 pages, 3965 KiB  
Article
Wood Distillate Mitigates Ozone-Induced Visible and Photosynthetic Plant Damage: Evidence from Ozone-Sensitive Tobacco (Nicotiana tabacum L.) BelW3
by Andrea Vannini and Alessandro Petraglia
Horticulturae 2024, 10(5), 480; https://doi.org/10.3390/horticulturae10050480 - 7 May 2024
Viewed by 532
Abstract
The use of wood distillate (WD) is emerging as a valuable strategy for protecting horticultural crops from the oxidizing effects of ozone (O3). To fully understand its effectiveness, extensive testing on different plant species is needed. As a viable interim measure, [...] Read more.
The use of wood distillate (WD) is emerging as a valuable strategy for protecting horticultural crops from the oxidizing effects of ozone (O3). To fully understand its effectiveness, extensive testing on different plant species is needed. As a viable interim measure, an assessment of WD efficacy in model plants can be made until species-specific results become available. The aim of this study is to evaluate the ability of WD derived from forest wood, including chestnut (Castanea sativa Mill.) wood, to protect the ozone-sensitive tobacco plant (Nicotiana tabacum L.) BelW3 from the oxidizing effects of O3, using the ozone-resistant tobacco plant BelB as a benchmark. The protective effect was evaluated during treatment applications and three weeks after these were completed. Ten BelW3 and five BelB plants were grown just outside Parma from June to October 2023, a period when average maximum O3 concentrations were at least 120 ppb. Starting from July, five BelW3 plants were sprayed weekly with WD at 0.2% for two months. Morphometric and photosynthetic measurements were then taken after six and 11 weeks from the beginning of treatments and three weeks after the end to assess protection persistence (if any). BelW3 showed a significant effect of O3 compared to BelB plants for both morphometric and photosynthetic measurements, exhibiting increased necrotic areas on the leaf blade, reduced number of viable leaves, reduced average plant height, together with reduced chlorophyll content and impaired photosynthetic system functionality. BelW3 plants also showed a significant decrease in the efficiency of parameters related to PSII and PSI when compared to BelB. Wood distillate application, however, successfully mitigated O3 effects on BelW3, as revealed by morphometric and photosynthetic values, which were in line with those observed in BelB. Notably, WD protective effect persisted 3 weeks after treatment cessation, highlighting the short-term protective capacity of the distillate against the oxidative action of O3. Full article
(This article belongs to the Special Issue Biostimulants and Plant Elicitors to Mitigate the Effect of Biotic and Abiotic Stress, Volume II)
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