Molecular Mechanisms of Abscisic Acid Action in Plants and Its Potential Applications to Human Health

Joshi-Saha, Archana; Valon, Christiane; Leung, Jeffrey

doi:10.1016/b978-0-12-387692-8.00007-2

Cited by 3 publications

(3 citation statements)

References 157 publications

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“…In another important response to drought stress, ABA regulates the transpiration rate via effects on stomatal aperture both by promoting closure and inhibiting opening (reviewed in Kwak et al, 2008;Kim et al, 2010;Joshi-Saha et al, 2011). Although both effects result in closed stomata, they are not simple reversals of the same process in that they involve different ion channels regulated by different signaling mechanisms.…”

Section: Stomatal Regulationmentioning

confidence: 99%

Abscisic Acid Synthesis and Response

Finkelstein¹

2013

The Arabidopsis Book

856

744

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Background: Small heat shock proteins (sHSPs) are critical for plant response to biotic and abiotic stresses, especially heat stress. They have also been implicated in various aspects of plant development. However, the acting mechanisms of the sHSPs in plants, especially in perennial grass species, remain largely elusive. Results: In this study, AsHSP26.8a, a novel chloroplast-localized sHSP gene from creeping bentgrass (Agrostis stolonifera L.) was cloned and its role in plant response to environmental stress was studied. AsHSP26.8a encodes a protein of 26.8kDa. Its expression was strongly induced in both leaf and root tissues by heat stress. Transgenic Arabidopsis plants overexpressing AsHSP26.8a displayed reduced tolerance to heat stress. Furthermore, overexpression of AsHSP26.8a resulted in hypersensitivity to hormone ABA and salinity stress. Global gene expression analysis revealed AsHSP26.8a-modulated expression of heat-shock transcription factor gene, and the involvement of AsHSP26.8a in ABAdependent and-independent as well as other stress signaling pathways. Conclusions: Our results suggest that AsHSP26.8a may negatively regulate plant response to various abiotic stresses through modulating ABA and other stress signaling pathways.

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Section: Stomatal Regulationmentioning

confidence: 99%

Abscisic Acid Synthesis and Response

Finkelstein¹

2013

The Arabidopsis Book

856

744

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“…In PEG, H 2 O 2 , and low temperature treatment, most genes were up-regulated. In addition, ABA plays a leading role in the regulation of plant adaptation to abiotic stresses, because ABA triggers many gene responses in plants and helps plants respond to environmental stimuli such as cold, drought, and salt [ 62 , 63 , 64 , 65 ]. In our study, after 12 h of ABA treatment, 17 PtCAF1 genes were up-regulated to varying degrees.…”

Section: Discussionmentioning

confidence: 99%

Genome-Wide and Comprehensive Analysis of the Multiple Stress-Related CAF1 (CCR4-Associated Factor 1) Family and Its Expression in Poplar

Wang

Wei

Sun

et al. 2021

Plants

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Poplar is one of the most widely used tree in afforestation projects. However, it is susceptible to abiotic and biotic stress. CCR4-associated factor 1 (CAF1) is a major member of CCR4-NOT, and it is mainly involved in transcriptional regulation and mRNA degradation in eukaryotes. However, there are no studies on the molecular phylogeny and expression of the CAF1 gene in poplar. In this study, a total of 19 PtCAF1 genes were identified in the Populus trichocarpa genome. Phylogenetic analysis of the PtCAF1 gene family was performed with two closely related species (Arabidopsis thaliana and Oryza sativa) to investigate the evolution of the PtCAF1 gene. The tissue expression of the PtCAF1 gene showed that 19 PtCAF1 genes were present in different tissues of poplar. Additionally, the analysis of the expression of the PtCAF1 gene showed that the CAF1 family was up-regulated to various degrees under biotic and abiotic stresses and participated in the poplar stress response. The results of our study provide a deeper understanding of the structure and function of the PtCAF1 gene and may contribute to our understanding of the molecular basis of stress tolerance in poplar.

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“…In another important response to drought stress, ABA regulates the transpiration rate via effects on stomatal aperture both by promoting closure and inhibiting opening (reviewed in Joshi-Saha et al, 2011). Although both effects result in closed stomata, they are not simple reversals of the same process in that they involve different ion channels regulated by different signaling mechanisms.…”

Section: Stomatal Regulationmentioning

confidence: 99%

Untitled

2022

GJAR

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Abscisic acid (ABA) is a phytohormone that regulates physiological processes such as seed maturation, seed dormancy, and stress adaptation. These physiological responses are triggered by the fluctuation of endogenous ABA levels in accordance with changing surroundings or developmental stimuli. Endogenous ABA levels are largely controlled by the balance between biosynthesis and catabolism. ABA is produced by cleavage of a 40-carbon carotenoid precursor that is synthesized from isopentenyl diphosphate via the plastid terpenoid pathway. ABA is synthesized in almost all cells that contain plastids and is transported via both the xylem and the phloem. ABA in tissues can be measured by bioassays based on growth, germination, or stomatal closure. Abscisic acid plays primary regulatory roles in the initiation and maintenance of seed and bud dormancy and in the plant's response to stress, particularly water stress.

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Molecular Mechanisms of Abscisic Acid Action in Plants and Its Potential Applications to Human Health

Cited by 3 publications

References 157 publications

Abscisic Acid Synthesis and Response

Abscisic Acid Synthesis and Response

Genome-Wide and Comprehensive Analysis of the Multiple Stress-Related CAF1 (CCR4-Associated Factor 1) Family and Its Expression in Poplar

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