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Role of Abscisic Acid in Plant Stress Response

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: closed (20 March 2025) | Viewed by 1536

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Guest Editor
Department of Biochemistry and Microbiology, Warsaw University of Life Sciences—SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland
Interests: plant stress response
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Special Issue Information

Dear Colleagues,

The phytohormone abscisic acid (ABA) is a major player in fine-tuning plants’ responses to adverse environmental conditions, including water deficiency, extreme temperatures, salinity, heavy metals, flooding, or pathogen attack. Tight control of ABA levels, which are constantly modulated by synthesis, degradation, (de)conjugation, and transport, is therefore crucial for a plant to adapt to its environment. The plant’s response to ABA stimuli is determined by its perception and transmission of downstream signals that trigger a cascade of relevant molecular, biochemical, physiological, and morphological responses, enabling the plant to cope with stress. Despite extensive research leading to significant progress being made in understanding the mechanisms of ABA-mediated response and adaptation to stress, our knowledge of many crucial pieces of this multifaceted puzzle is still lacking.

This Special Issue aims to collate recent advances addressing the role of ABA in plant responses to stress, which have emerged from the implementation of a wide range of approaches, from molecular/genetic approaches to whole plant physiology studies. Original research and review articles that concern stress-induced changes in ABA metabolism, ABA perception and signaling, ABA-dependent responses in the plant transcriptome and metabolome, as well as the interaction of ABA with other hormones in plant response and adaptation to stress are welcome to be submitted to this Special Issue.

Dr. Edyta Zdunek-Zastocka
Guest Editor

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Keywords

  • abiotic stress
  • biotic stress
  • ABA metabolism
  • ABA perception
  • ABA signaling
  • ABA response
  • cross-talk of ABA with other hormones
  • stress response
  • adaptation to stress

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Published Papers (1 paper)

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Research

17 pages, 2335 KiB  
Article
Cadmium Alters the Metabolism and Perception of Abscisic Acid in Pisum sativum Leaves in a Developmentally Specific Manner
by Edyta Zdunek-Zastocka, Beata Michniewska, Angelika Pawlicka and Agnieszka Grabowska
Int. J. Mol. Sci. 2024, 25(12), 6582; https://doi.org/10.3390/ijms25126582 - 14 Jun 2024
Cited by 1 | Viewed by 1005
Abstract
Abscisic acid (ABA) plays a crucial role in plant defense mechanisms under adverse environmental conditions, but its metabolism and perception in response to heavy metals are largely unknown. In Pisum sativum exposed to CdCl2, an accumulation of free ABA was detected [...] Read more.
Abscisic acid (ABA) plays a crucial role in plant defense mechanisms under adverse environmental conditions, but its metabolism and perception in response to heavy metals are largely unknown. In Pisum sativum exposed to CdCl2, an accumulation of free ABA was detected in leaves at different developmental stages (A, youngest, unexpanded; B1, youngest, fully expanded; B2, mature; C, old), with the highest content found in A and B1 leaves. In turn, the content of ABA conjugates, which was highest in B2 and C leaves under control conditions, increased only in A leaves and decreased in leaves of later developmental stages after Cd treatment. Based on the expression of PsNCED2, PsNCED3 (9-cis-epoxycarotenoid dioxygenase), PsAO3 (aldehyde oxidase) and PsABAUGT1 (ABA-UDP-glucosyltransferase), and the activity of PsAOγ, B2 and C leaves were found to be the main sites of Cd-induced de novo synthesis of ABA from carotenoids and ABA conjugation with glucose. In turn, β-glucosidase activity and the expression of genes encoding ABA receptors (PsPYL2, PsPYL4, PsPYL8, PsPYL9) suggest that in A and B1 leaves, Cd-induced release of ABA from inactive ABA-glucosyl esters and enhanced ABA perception comes to the forefront when dealing with Cd toxicity. The distinct role of leaves at different developmental stages in defense against the harmful effects of Cd is discussed. Full article
(This article belongs to the Special Issue Role of Abscisic Acid in Plant Stress Response)
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