Abscisic Acid—Enemy or Savior in the Response of Cereals to Abiotic and Biotic Stresses?

Gietler, Marta; Fidler, Justyna; Labudda, Mateusz; Nykiel, Małgorzata

doi:10.3390/ijms21134607

Cited by 50 publications

(35 citation statements)

References 200 publications

(260 reference statements)

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“…When plants were exposed to water stress (drought), an increase in ABA was typical due to either synthesis or degradation of ABA or both ( Ma et al, 2018 ; Chen K. et al, 2020 ; Gietler et al, 2020 ). The soil-water deficit could be perceived as a signal by roots to trigger ABA’s de novo synthesis ( Jiang and Hartung, 2008 ; Fang and Xiong, 2015 ; Qi et al, 2018 ).…”

Section: Increased Aba Levels Under Different Stress Conditionsmentioning

confidence: 99%

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Abscisic Acid-Induced Stomatal Closure: An Important Component of Plant Defense Against Abiotic and Biotic Stress

2021

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Abscisic acid (ABA) is a stress hormone that accumulates under different abiotic and biotic stresses. A typical effect of ABA on leaves is to reduce transpirational water loss by closing stomata and parallelly defend against microbes by restricting their entry through stomatal pores. ABA can also promote the accumulation of polyamines, sphingolipids, and even proline. Stomatal closure by compounds other than ABA also helps plant defense against both abiotic and biotic stress factors. Further, ABA can interact with other hormones, such as methyl jasmonate (MJ) and salicylic acid (SA). Such cross-talk can be an additional factor in plant adaptations against environmental stresses and microbial pathogens. The present review highlights the recent progress in understanding ABA’s multifaceted role under stress conditions, particularly stomatal closure. We point out the importance of reactive oxygen species (ROS), reactive carbonyl species (RCS), nitric oxide (NO), and Ca2+ in guard cells as key signaling components during the ABA-mediated short-term plant defense reactions. The rise in ROS, RCS, NO, and intracellular Ca2+ triggered by ABA can promote additional events involved in long-term adaptive measures, including gene expression, accumulation of compatible solutes to protect the cell, hypersensitive response (HR), and programmed cell death (PCD). Several pathogens can counteract and try to reopen stomata. Similarly, pathogens attempt to trigger PCD of host tissue to their benefit. Yet, ABA-induced effects independent of stomatal closure can delay the pathogen spread and infection within leaves. Stomatal closure and other ABA influences can be among the early steps of defense and a crucial component of plants’ innate immunity response. Stomatal guard cells are quite sensitive to environmental stress and are considered good model systems for signal transduction studies. Further research on the ABA-induced stomatal closure mechanism can help us design strategies for plant/crop adaptations to stress.

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Section: Increased Aba Levels Under Different Stress Conditionsmentioning

confidence: 99%

“…Readers interested in ABA and its role in plants may refer to some recent reviews ( Kumar et al, 2019 ; Chen K. et al, 2020 ; Gietler et al, 2020 ; McAdam and Sussmilch, 2020 ). Our review emphasizes the role of ABA’s stomatal closure as an adaptive measure against both abiotic and biotic stresses.…”

Section: Introduction: Aba and Plant Defensementioning

confidence: 99%

Abscisic Acid-Induced Stomatal Closure: An Important Component of Plant Defense Against Abiotic and Biotic Stress

2021

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“…The review by Gietler et al [ 11 ] presents two faces of abscisic acid (ABA): a savior and a fiend. Its positive role involves its contribution to the control of plant natural developmental processes, as well as to stress responses.…”

Section: Reviewsmentioning

confidence: 99%

Wheat and Barley: Acclimatization to Abiotic and Biotic Stress

Hura

2020

IJMS

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Twelve articles (ten research papers and two reviews) included in the Special Issue entitled “Wheat and Barley: Acclimatization to Abiotic and Biotic Stress” are summed up here to present the latest research on the molecular background of adaptation to environmental stresses in two cereal species. Crucial research results were presented and discussed, as they may be of importance in breeding aimed at increasing wheat and barley tolerance to abiotic and biotic stresses.

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“…During these processes, ABA signaling interacts antagonistically or synergistically with other hormonal signaling pathways mediated by auxin, cytokinin, ethylene, and jasmonates [ 7 ]. Thus, excess ABA impairs developmental processes such as senescence, as well as pollen fertility, and also leads to seed dormancy and susceptibility to diseases [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Transcriptional Regulation of Protein Phosphatase 2C Genes to Modulate Abscisic Acid Signaling

Jung

Nguyen

Cheong

2020

IJMS

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The plant hormone abscisic acid (ABA) triggers cellular tolerance responses to osmotic stress caused by drought and salinity. ABA controls the turgor pressure of guard cells in the plant epidermis, leading to stomatal closure to minimize water loss. However, stomatal apertures open to uptake CO2 for photosynthesis even under stress conditions. ABA modulates its signaling pathway via negative feedback regulation to maintain plant homeostasis. In the nuclei of guard cells, the clade A type 2C protein phosphatases (PP2Cs) counteract SnRK2 kinases by physical interaction, and thereby inhibit activation of the transcription factors that mediate ABA-responsive gene expression. Under osmotic stress conditions, PP2Cs bind to soluble ABA receptors to capture ABA and release active SnRK2s. Thus, PP2Cs function as a switch at the center of the ABA signaling network. ABA induces the expression of genes encoding repressors or activators of PP2C gene transcription. These regulators mediate the conversion of PP2C chromatins from a repressive to an active state for gene transcription. The stress-induced chromatin remodeling states of ABA-responsive genes could be memorized and transmitted to plant progeny; i.e., transgenerational epigenetic inheritance. This review focuses on the mechanism by which PP2C gene transcription modulates ABA signaling.

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Abscisic Acid—Enemy or Savior in the Response of Cereals to Abiotic and Biotic Stresses?

Cited by 50 publications

References 200 publications

Abscisic Acid-Induced Stomatal Closure: An Important Component of Plant Defense Against Abiotic and Biotic Stress

Abscisic Acid-Induced Stomatal Closure: An Important Component of Plant Defense Against Abiotic and Biotic Stress

Wheat and Barley: Acclimatization to Abiotic and Biotic Stress

Transcriptional Regulation of Protein Phosphatase 2C Genes to Modulate Abscisic Acid Signaling

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