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Plant Hormone Signaling
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Plant Hormone Signaling

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Plant Sciences".

Deadline for manuscript submissions: 20 December 2024 | Viewed by 5523

Special Issue Editors

Dr. Ewa Muszyńska

E-Mail Website
Guest Editor
Department of Botany, Institute of Biology, Warsaw University of Life Sciences-SGGW, 159 Nowoursynowska St., 02-776 Warsaw, Poland
Interests: cell ultrastructure; plant anatomy and physiology; signaling molecules; abiotic stress mechanisms and adaptation; tissue culture
Special Issues, Collections and Topics in MDPI journals
Dr. Kinga Dziurka

E-Mail Website
Guest Editor
Department of Biotechnology, The Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, 30-239 Kraków, Poland
Interests: hormonal signaling; embryogenesis; stress physiology; in vitro cultures; hormonal crosstalk
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

As sessile organisms, plants must constantly adjust their growth and architecture to their ever-changing environment. In doing so, they need to evolve mechanisms mediated by signaling molecules that ensure the correct integration of environmental stimuli with endogenous developmental programs. Some of the effective chemical messengers are plant hormones, which play an impressive range of roles during normal plant growth and development from embryogenesis to senescence, as well as in various responses to both biotic and abiotic stresses.

This Special Issue focuses on revealing the recent advances in all aspects of phytohormones’ modes of action—from perception and signal transduction to homeostasis and their influence on gene expression. It also covers the mechanisms of phytohormone cross-talk with other molecules involving their synergy and interdependency, whose interactions converge at physiological, biochemical, molecular, and structural levels integrating and coordinating the developmental processes under normal and stressful conditions. Further, our Special Issue concerns the intercellular transport of plant growth regulators and their function in systemic signaling systems by which plants induce and maintain protection against various stressors.

We welcome the submission of original and review papers contributing to a better understanding of plant hormones sensu lato and showing the current state of knowledge and future prospects in this scientific research area.

Dr. Ewa Muszyńska
Dr. Kinga Dziurka
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.

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Please visit the Instructions for Authors page before submitting a manuscript. There is an Article Processing Charge (APC) for publication in this open access journal. For details about the APC please see here. 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

  • hormonal regulation
  • cross-talk between phytohormones and other metabolites
  • signaling
  • gene expression
  • defense mechanisms
  • abiotic and biotic stress
  • plant growth and development

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Published Papers (6 papers)

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Research

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19 pages, 10692 KiB  
Article
Arabidopsis GLYI4 Reveals Intriguing Insights into the JA Signaling Pathway and Plant Defense
by Gaia Salvatore Falconieri, Laura Bertini, Matteo Fiaschetti, Elisabetta Bizzarri, Ivan Baccelli, Carla Caruso and Silvia Proietti
Int. J. Mol. Sci. 2024, 25(22), 12162; https://doi.org/10.3390/ijms252212162 - 13 Nov 2024
Viewed by 404
Abstract
Plant hormones play a central role in various physiological functions and mediate defense responses against (a)biotic stresses. Jasmonic acid (JA) has emerged as one of the key phytohormones involved in the response to necrotrophic pathogens. Under stressful conditions, plants can also produce small [...] Read more.
Plant hormones play a central role in various physiological functions and mediate defense responses against (a)biotic stresses. Jasmonic acid (JA) has emerged as one of the key phytohormones involved in the response to necrotrophic pathogens. Under stressful conditions, plants can also produce small molecules, such as methylglyoxal (MG), a cytotoxic aldehyde. The enzymes glyoxalase I (GLYI) and glyoxalase II primarily detoxify MG. In Arabidopsis thaliana, GLYI4 has been recently characterized as having a crucial role in MG detoxification and emerging involvement in the JA pathway. Here, we investigated the impact of a GLYI4 loss-of-function on the Arabidopsis JA pathway and how MG affects it. The results showed that the glyI4 mutant plant had stunted growth, a smaller rosette diameter, reduced leaf size, and an altered pigment concentration. A gene expression analysis of the JA marker genes showed significant changes in the JA biosynthetic and signaling pathway genes in the glyI4 mutant. Disease resistance bioassays against the necrotroph Botrytis cinerea revealed altered patterns in the glyI4 mutant, likely due to increased oxidative stress. The MG effect has a further negative impact on plant performance. Collectively, these results contribute to clarifying the intricate interconnections between the GLYI4, MG, and JA pathways, opening up new avenues for further explorations of the intricate molecular mechanisms controlling plant stress responses. Full article
(This article belongs to the Special Issue Plant Hormone Signaling)
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14 pages, 3479 KiB  
Article
Genome-Wide Identification of Sorghum Paclobutrazol-Resistance Gene Family and Functional Characterization of SbPRE4 in Response to Aphid Stress
by Yongchao Guo, Zhifang Wang, Zhiyin Jiao, Guang Yuan, Li Cui, Pengwei Duan, Jingtian Niu, Peng Lv, Jinping Wang and Yannan Shi
Int. J. Mol. Sci. 2024, 25(13), 7257; https://doi.org/10.3390/ijms25137257 - 1 Jul 2024
Viewed by 1014
Abstract
Sorghum (Sorghum bicolor), the fifth most important cereal crop globally, serves as a staple food, animal feed, and a bioenergy source. Paclobutrazol-Resistance (PRE) genes play a pivotal role in the response to environmental stress, yet the understanding of their [...] Read more.
Sorghum (Sorghum bicolor), the fifth most important cereal crop globally, serves as a staple food, animal feed, and a bioenergy source. Paclobutrazol-Resistance (PRE) genes play a pivotal role in the response to environmental stress, yet the understanding of their involvement in pest resistance remains limited. In the present study, a total of seven SbPRE genes were found within the sorghum BTx623 genome. Subsequently, their genomic location was studied, and they were distributed on four chromosomes. An analysis of cis-acting elements in SbPRE promoters revealed that various elements were associated with hormones and stress responses. Expression pattern analysis showed differentially tissue-specific expression profiles among SbPRE genes. The expression of some SbPRE genes can be induced by abiotic stress and aphid treatments. Furthermore, through phytohormones and transgenic analyses, we demonstrated that SbPRE4 improves sorghum resistance to aphids by accumulating jasmonic acids (JAs) in transgenic Arabidopsis, giving insights into the molecular and biological function of atypical basic helix-loop-helix (bHLH) transcription factors in sorghum pest resistance. Full article
(This article belongs to the Special Issue Plant Hormone Signaling)
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18 pages, 2367 KiB  
Article
Characterising Biological and Physiological Drought Signals in Diverse Parents of a Wheat Mapping Population
by Kamila Laskoś, Ilona Mieczysława Czyczyło-Mysza, Piotr Waligórski, Kinga Dziurka, Edyta Skrzypek, Marzena Warchoł, Katarzyna Juzoń-Sikora, Franciszek Janowiak, Michał Dziurka, Maciej T. Grzesiak, Stanisław Grzesiak, Steve Quarrie and Izabela Marcińska
Int. J. Mol. Sci. 2024, 25(12), 6573; https://doi.org/10.3390/ijms25126573 - 14 Jun 2024
Viewed by 667
Abstract
Water deficit affects the growth as well as physiological and biochemical processes in plants. The aim of this study was to determine differences in physiological and biochemical responses to drought stress in two wheat cultivars—Chinese Spring (CS) and SQ1 (which are parents of [...] Read more.
Water deficit affects the growth as well as physiological and biochemical processes in plants. The aim of this study was to determine differences in physiological and biochemical responses to drought stress in two wheat cultivars—Chinese Spring (CS) and SQ1 (which are parents of a mapping population of doubled haploid lines)—and to relate these responses to final yield and agronomic traits. Drought stress was induced by withholding water for 14 days, after which plants were re-watered and maintained until harvest. Instantaneous gas exchange parameters were evaluated on the 3rd, 5th, 10th, and 14th days of seedling growth under drought. After 14 days, water content and levels of chlorophyll a+b, carotenoids, malondialdehyde, soluble carbohydrates, phenolics, salicylic acid, abscisic acid (ABA), and polyamines were measured. At final maturity, yield components (grain number and weight), biomass, straw weight, and harvest index were evaluated. Physiological and biochemical parameters of CS responded more than those of SQ1 to the 14-day drought, reflected in a greater reduction in final biomass and yield in CS. Marked biochemical differences between responses of CS and SQ1 to the drought were found for soluble carbohydrates and polyamines. These would be good candidates for testing in the mapping population for the coincidence of the genetic control of these traits and final biomass and yield. Full article
(This article belongs to the Special Issue Plant Hormone Signaling)
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31 pages, 3051 KiB  
Article
Cold Acclimation and Deacclimation of Winter Oilseed Rape, with Special Attention Being Paid to the Role of Brassinosteroids
by Julia Stachurska, Iwona Sadura, Barbara Jurczyk, Elżbieta Rudolphi-Szydło, Barbara Dyba, Ewa Pociecha, Agnieszka Ostrowska, Magdalena Rys, Miroslav Kvasnica, Jana Oklestkova and Anna Janeczko
Int. J. Mol. Sci. 2024, 25(11), 6010; https://doi.org/10.3390/ijms25116010 - 30 May 2024
Viewed by 888
Abstract
Winter plants acclimate to frost mainly during the autumn months, through the process of cold acclimation. Global climate change is causing changes in weather patterns such as the occurrence of warmer periods during late autumn or in winter. An increase in temperature after [...] Read more.
Winter plants acclimate to frost mainly during the autumn months, through the process of cold acclimation. Global climate change is causing changes in weather patterns such as the occurrence of warmer periods during late autumn or in winter. An increase in temperature after cold acclimation can decrease frost tolerance, which is particularly dangerous for winter crops. The aim of this study was to investigate the role of brassinosteroids (BRs) and BR analogues as protective agents against the negative results of deacclimation. Plants were cold-acclimated (3 weeks, 4 °C) and deacclimated (1 week, 16/9 °C d/n). Deacclimation generally reversed the cold-induced changes in the level of the putative brassinosteroid receptor protein (BRI1), the expression of BR-induced COR, and the expression of SERK1, which is involved in BR signal transduction. The deacclimation-induced decrease in frost tolerance in oilseed rape could to some extent be limited by applying steroid regulators. The deacclimation in plants could be detected using non-invasive measurements such as leaf reflectance, chlorophyll a fluorescence, and gas exchange monitoring. Full article
(This article belongs to the Special Issue Plant Hormone Signaling)
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11 pages, 2693 KiB  
Article
ZmNAC17 Regulates Mesocotyl Elongation by Mediating Auxin and ROS Biosynthetic Pathways in Maize
by Ran Yang, Kangshi Li, Ming Wang, Meng Sun, Qiuhua Li, Liping Chen, Feng Xiao, Zhenlong Zhang, Haiyan Zhang, Fuchao Jiao and Jingtang Chen
Int. J. Mol. Sci. 2024, 25(9), 4585; https://doi.org/10.3390/ijms25094585 - 23 Apr 2024
Viewed by 1022
Abstract
The mesocotyl is of great significance in seedling emergence and in responding to biotic and abiotic stress in maize. The NAM, ATAF, and CUC2 (NAC) transcription factor family plays an important role in maize growth and development; however, its function in the elongation [...] Read more.
The mesocotyl is of great significance in seedling emergence and in responding to biotic and abiotic stress in maize. The NAM, ATAF, and CUC2 (NAC) transcription factor family plays an important role in maize growth and development; however, its function in the elongation of the maize mesocotyl is still unclear. In this study, we found that the mesocotyl length in zmnac17 loss-of-function mutants was lower than that in the B73 wild type. By using transcriptomic sequencing technology, we identified 444 differentially expressed genes (DEGs) between zmnac17-1 and B73, which were mainly enriched in the “tryptophan metabolism” and “antioxidant activity” pathways. Compared with the control, the zmnac17-1 mutants exhibited a decrease in the content of indole acetic acid (IAA) and an increase in the content of reactive oxygen species (ROS). Our results provide preliminary evidence that ZmNAC17 regulates the elongation of the maize mesocotyl. Full article
(This article belongs to the Special Issue Plant Hormone Signaling)
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Review

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26 pages, 3166 KiB  
Review
From Regulation to Application: The Role of Abscisic Acid in Seed and Fruit Development and Agronomic Production Strategies
by Xunan Zheng, Weiliang Mo, Zecheng Zuo, Qingchi Shi, Xiaoyu Chen, Xuelai Zhao and Junyou Han
Int. J. Mol. Sci. 2024, 25(22), 12024; https://doi.org/10.3390/ijms252212024 - 8 Nov 2024
Viewed by 796
Abstract
Abscisic acid (ABA) is a crucial plant hormone that plays a decisive role in regulating seed and fruit development and is becoming increasingly important in agricultural applications. This article delves into ABA’s regulatory functions in plant growth, particularly during the stages of seed [...] Read more.
Abscisic acid (ABA) is a crucial plant hormone that plays a decisive role in regulating seed and fruit development and is becoming increasingly important in agricultural applications. This article delves into ABA’s regulatory functions in plant growth, particularly during the stages of seed and fruit development. In the seed phase, elevated ABA levels help maintain seed dormancy, aiding seed survival under unfavorable conditions. During fruit development, ABA regulates pigment synthesis and sugar accumulation, influencing the nutritional value and market quality of the fruit. This article highlights three main strategies for applying ABA in agricultural production: the use of ABA analogs, the development of ABA signal modulators, and breeding techniques based on ABA signaling. ABA analogs can mimic the natural functions of ABA, while ABA signal modulators, including enhancers and inhibitors, are used to finely tune plant responses to ABA, optimizing crop performance under specific growth conditions. Furthermore, breeding strategies based on ABA signaling aim to select crop varieties that effectively utilize ABA pathways through genetic engineering and other technologies. ABA is not only a key regulator of plant growth and development but also holds great potential for modern agricultural practices. Full article
(This article belongs to the Special Issue Plant Hormone Signaling)
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