How Plant Hormones Mediate Salt Stress Responses

Salt stress is one of the major environmental stresses limiting plant growth and productivity. To adapt to salt stress, plants have developed various strategies to integrate exogenous salinity stress signals with endogenous developmental cues to optimize the balance of growth and stress responses. A...

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Bibliographic Details
Published in:Trends in plant science 2020-11, Vol.25 (11), p.1117-1130
Main Authors: Yu, Zipeng, Duan, Xiangbo, Luo, Lu, Dai, Shaojun, Ding, Zhaojun, Xia, Guangmin
Format: Article
Language:English
Subjects:
Abiotic stress
Adaptation
crosstalk among hormones
Environmental stress
Hormones
Phytohormones
Plant growth
Plant hormones
Salinity
Salinity effects
Salinity tolerance
salt adaptation
salt stress
Salts
Stresses
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Summary:Salt stress is one of the major environmental stresses limiting plant growth and productivity. To adapt to salt stress, plants have developed various strategies to integrate exogenous salinity stress signals with endogenous developmental cues to optimize the balance of growth and stress responses. Accumulating evidence indicates that phytohormones, besides controlling plant growth and development under normal conditions, also mediate various environmental stresses, including salt stress, and thus regulate plant growth adaptation. In this review, we mainly discuss and summarize how plant hormones mediate salinity signals to regulate plant growth adaptation. We also highlight how, in response to salt stress, plants build a defense system by orchestrating the synthesis, signaling, and metabolism of various hormones via multiple crosstalks. Both stress hormones and growth hormones are important in the mediation of plant salinity stress responses.Sophisticated crosstalk occurs among the different hormones in plant growth adaptation under salinity stress.The cooperation or antagonism among different plant hormones is dependent on growth stages.Plants adapt to salinity stress through flexible regulation of hormone levels and/or signaling.Glycosyl inositol phosphorylceramide (GIPC) sphingolipids in the plasma membrane act as Na+ receptors for sensing Na+ in the apoplastic space and then gate Ca2+ influx channels in plants.
ISSN:1360-1385
1878-4372
DOI:10.1016/j.tplants.2020.06.008