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Brassinosteroids: Signaling and Role in Plant Responses to Biotic and...
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Brassinosteroids: Signaling and Role in Plant Responses to Biotic and Abiotic Stresses

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Physiology and Metabolism".

Deadline for manuscript submissions: 31 August 2024 | Viewed by 3136

Special Issue Editors

Dr. Vladimir N. Zhabinskii

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Guest Editor
Institute of Bioorganic Chemistry of the National Academy of Sciences of Belarus, Minsk, Belarus
Interests: steroids; brassinosteroids; synthesis; biological activity
Dr. Andrzej Bajguz

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Guest Editor
Department of Biology and Plant Ecology, Faculty of Biology, University of Bialystok, Bialystok, Poland
Interests: adaptation to heavy metal stress; brassinosteroids; phytoecdysteroids; phytohormones
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Plants experience various biotic and abiotic stresses that negatively affect crop yield. Drought, high or low temperatures, increased acidity, salinity, pesticide load, diseases are stress factors that cause changes in plant development. Preventing crop loss due to these factors means minimizing the loss of genetic potential and thereby increasing the yield and quality of crops. Achieving this goal involves understanding the physiological and molecular mechanisms of plant resistance to the damaging effects of biotic and abiotic factors: one of the fundamental problems of biology. Hormonal factors and, first of all, brassinosteroids play a key role in increasing the stress resistance of plants. This Special Issue of Plants welcomes original research and review studies on the role of brassinosteroids in the plant response to biotic and abiotic stresses, including but not limited to the following subtopics: influence on photosynthetic machinery, cross-talk with other phytohormones, effects on the production of secondary metabolites, application for improving crop production.

Dr. Vladimir N. Zhabinskii
Dr. Andrzej Bajguz
Guest Editor

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. Plants is an international peer-reviewed open access semimonthly 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 2700 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

  • phytohormones
  • brassinosteroids
  • biotic stress
  • abiotic stress

Published Papers (3 papers)

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Research

19 pages, 2162 KiB  
Article
Effects of Lactone- and Ketone-Brassinosteroids of the 28-Homobrassinolide Series on Barley Plants under Water Deficit
by Liliya V. Kolomeichuk, Ol’ga K. Murgan, Elena D. Danilova, Mariya V. Serafimovich, Vladimir A. Khripach, Raisa P. Litvinovskaya, Alina L. Sauchuk, Daria V. Denisiuk, Vladimir N. Zhabinskii, Vladimir V. Kuznetsov and Marina V. Efimova
Plants 2024, 13(10), 1345; https://doi.org/10.3390/plants13101345 - 13 May 2024
Viewed by 398
Abstract
The aim of this work was to study the ability of 28-homobrassinolide (HBL) and 28-homocastasterone (HCS) to increase the resistance of barley (Hordeum vulgare L.) plants to drought and to alter their endogenous brassinosteroid status. Germinated barley seeds were treated with 0.1 [...] Read more.
The aim of this work was to study the ability of 28-homobrassinolide (HBL) and 28-homocastasterone (HCS) to increase the resistance of barley (Hordeum vulgare L.) plants to drought and to alter their endogenous brassinosteroid status. Germinated barley seeds were treated with 0.1 nM HBL or HCS solutions for two hours. A water deficit was created by stopping the watering of 7-day-old plants for the next two weeks. Plants responded to drought through growth inhibition, impaired water status, increased lipid peroxidation, differential effects on antioxidant enzymes, intense proline accumulation, altered expression of genes involved in metabolism, and decreased endogenous contents of hormones (28-homobrassinolide, B-ketones, and B-lactones). Pretreatment of plants with HBL reduced the inhibitory effect of drought on fresh and dry biomass accumulation and relative water content, whereas HCS partially reversed the negative effect of drought on fresh biomass accumulation, reduced the intensity of lipid peroxidation, and increased the osmotic potential. Compared with drought stress alone, pretreatment of plants with HCS or HBL followed by drought increased superoxide dismutase activity sevenfold or threefold and catalase activity (by 36%). The short-term action of HBL and HCS in subsequent drought conditions partially restored the endogenous B-ketone and B-lactone contents. Thus, the steroidal phytohormones HBL and HCS increased barley plant resistance to subsequent drought, showing some specificity of action. Full article
(This article belongs to the Special Issue Brassinosteroids: Signaling and Role in Plant Responses to Biotic and Abiotic Stresses)
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22 pages, 3045 KiB  
Article
Exogenous Application of 24-Epibrassinolide Confers Saline Stress and Improves Photosynthetic Capacity, Antioxidant Defense, Mineral Uptake, and Yield in Maize
by Mahmoud F. Seleiman, Awais Ahmad, ElKamil Tola, Bushra Ahmed Alhammad, Khalid F. Almutairi, Rangaswamy Madugundu and Khalid A. Al-Gaadi
Plants 2023, 12(20), 3559; https://doi.org/10.3390/plants12203559 - 13 Oct 2023
Cited by 1 | Viewed by 1096
Abstract
Salinity is one of the major environmental stresses threatening crop production, the natural ecosystem, global food security, and the socioeconomic health of humans. Thus, the development of eco-friendly strategies to mitigate saline stress and/or enhance crop tolerance is an important issue worldwide. Therefore, [...] Read more.
Salinity is one of the major environmental stresses threatening crop production, the natural ecosystem, global food security, and the socioeconomic health of humans. Thus, the development of eco-friendly strategies to mitigate saline stress and/or enhance crop tolerance is an important issue worldwide. Therefore, this study was conducted during the summer of 2022 to investigate the potential of 24-Epibrassinolide (EBL) for mitigating saline stress and improving photosynthetic capacity, antioxidant defense systems, mineral uptake, and yield in maize (Zea mays L.) grown under a controlled hydroponic system. Three saline stress levels—S1 (control/no added NaCl), S2 (60 mM NaCl), and S3 (120 mM NaCl)—were continuously applied with nutrient solution, whereas exogenous EBL (i.e., control, 0.1 µM and 0.2 µM) was applied as exogenous application three times (i.e., 40, 55, 70 days after sowing). The experiment was designed as a split-plot in a randomized complete block design (RCBD) in which saline stress was the main factor and EBL treatment was the sub-factor. Results showed that saline stress significantly affected plant growth, physiological performance, biochemistry, antioxidant activity, and yield attributes. However, the exogenous application of EBL at 0.2 µM significantly mitigated the salt stress and thus improved plant performance even under 120 mM NaCl saline stress. For instance, as compared to untreated plants (control), 0.2 µM EBL application improved plant height (+18%), biomass (+19%), SPAD (+32%), Fv/Fm (+28%), rate of photosynthesis (+11%), carboxylation efficiency (+6%), superoxide dismutase (SOD +14%), catalase (CAT +18%), ascorbate peroxidase (APX +20%), K+ (+24%), 100-grain weight (+11%), and grain yield (+47%) of maize grown under salt stress. Additionally, it resulted in a 23% reduction in Na+ accumulation in leaves and a 25% reduction in for Na+/K+ ratio under saline stress as compared to control. Furthermore, the Pearson’s correlation and principal component analysis (PCA) highlighted the significance of exogenous EBL as saline stress mitigator in maize. Overall, our results indicated the protective effects of EBL application to the alleviation of saline stress in crop plants. However, further exploration of its mechanism of action and crop-specific response is suggested prior to commercial use in agriculture. Full article
(This article belongs to the Special Issue Brassinosteroids: Signaling and Role in Plant Responses to Biotic and Abiotic Stresses)
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16 pages, 1598 KiB  
Article
28-Homobrassinolide Primed Seed Improved Lead Stress Tolerance in Brassica rapa L. through Modulation of Physio-Biochemical Attributes and Nutrient Uptake
by Mawra Khan, Shakil Ahmed, Nasim Ahmad Yasin, Rehana Sardar, Muhammad Hussaan, Abdel-Rhman Z. Gaafar and Faish Ullah Haider
Plants 2023, 12(20), 3528; https://doi.org/10.3390/plants12203528 - 11 Oct 2023
Viewed by 1025
Abstract
Brassinosteroids (BRs) influence a variety of physiological reactions and alleviate different biotic and abiotic stressors. Turnip seedlings were grown with the goal of further exploring and expanding their function in plants under abiotic stress, particularly under heavy metal toxicity (lead stress). This study’s [...] Read more.
Brassinosteroids (BRs) influence a variety of physiological reactions and alleviate different biotic and abiotic stressors. Turnip seedlings were grown with the goal of further exploring and expanding their function in plants under abiotic stress, particularly under heavy metal toxicity (lead stress). This study’s objective was to ascertain the role of applied 28-homobrassinolide (HBL) in reducing lead (Pb) stress in turnip plants. Turnip seeds treated with 1, 5, and 10 µM HBL and were grown-up in Pb-contaminated soil (300 mg kg−1). Lead accumulation reduces biomass, growth attributes, and various biochemical parameters, as well as increasing proline content. Seed germination, root and shoot growth, and gas exchange characteristics were enhanced via HBL treatment. Furthermore, Pb-stressed seedlings had decreased total soluble protein concentrations, photosynthetic pigments, nutrition, and phenol content. Nonetheless, HBL increased chlorophyll a and chlorophyll b levels in plant, resulting in increased photosynthesis. As a result, seeds treated with HBL2 (5 µM L−1) had higher nutritional contents (Mg+2, Zn+2, Na+2, and K+1). HBL2-treated seedlings had higher DPPH and metal tolerance indexes. This led to the conclusion that HBL2 effectively reduced Pb toxicity and improved resistance in lead-contaminated soil. Full article
(This article belongs to the Special Issue Brassinosteroids: Signaling and Role in Plant Responses to Biotic and Abiotic Stresses)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Role of Nitric Oxide in Brassinosteroid-induced Plant Stress Response
Authors: Golam Jalal Ahammed1 and Xin Li2
Affiliation: 1 College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang 471023, PR China 2 Chinese Academy of Agricultural Sciences, Hangzhou 310008, PR China
Abstract: Nitric oxide (NO) is a crucial signaling molecule in plants that plays multifarious roles in plant responses to environmental stimuli. Although NO can be toxic when accumulates in excess, recent advances in plant reactive nitrogen species (RNS) signaling biology reveal that NO participates in biotic and abiotic stress perception, signal integration, and stress-response network activation, hence contributing to plant defense and stress tolerance. NO production, removal and transport are fine-tuned by plant hormones and stress-response signaling pathways. Two enzymatic sources of NO production, such as nitrate reductase (NR) and nitrate synthase (NOS), are believed to play a crucial role in mediating phytohormone-regulated responses in plants. Notably, NO mediates brassinosteroid-induced plant developmental response and stress tolerance. In particular, NR-derived NO generation acts downstream of brassinosteroid to mediate stress response. In this review, we discuss promising developments in plant NO signaling and how NO might mediate brassinosteroid-induced plant resilience to environmental stress.

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