Plant hormone regulation of abiotic stress responses

Waadt, Rainer; Seller, Charles A.; Hsu, Po Kuei; Takahashi, Yohei; Munemasa, Shintaro; Schroeder, Julian I.

doi:10.1038/s41580-022-00479-6

Cited by 354 publications

(143 citation statements)

References 229 publications

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“…Damage caused by alkaline salt stress is more severe than that only caused by neutral salt stress. Phytohormones are inherent signaling molecules, which regulate the growth and development of plants by producing complex responses under various stresses (Verma et al, 2016;Waadt et al, 2022). SL, as a group of carotenoidderived plant hormones, play an important role in regulating various developmental and adaptation processes in plants (Wang et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

Strigolactone alleviates the salinity-alkalinity stress of Malus hupehensis seedlings

Bian

Liu

et al. 2022

Front. Plant Sci.

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Salinity-alkalinity stress can remarkably affect the growth and yield of apple. Strigolactone (SL) is a class of carotenoid-derived compounds that functions in stress tolerance. However, the effects and mechanism of exogenous SL on the salinity-alkalinity tolerance of apple seedlings remain unclear. Here, we assessed the effect of SL on the salinity-alkalinity stress response of Malus hupehensis seedlings. Results showed that treatment with 100 μM exogenous SL analog (GR24) could effectively alleviate salinity-alkalinity stress with higher chlorophyll content and photosynthetic rate than the apple seedlings without GR24 treatment. The mechanism was also explored: First, exogenous GR24 regulated the expression of Na+/K+ transporter genes and decreased the ratio of Na+/K+ in the cytoplasm to maintain ion homeostasis. Second, exogenous GR24 increased the enzyme activities of superoxide, peroxidase and catalase, thereby eliminating reactive oxygen species production. Third, exogenous GR24 alleviated the high pH stress by regulating the expression of H+-ATPase genes and inducing the production of organic acid. Last, exogenous GR24 application increased endogenous acetic acid, abscisic acid, zeatin riboside, and GA3 contents for co-responding to salinity-alkalinity stress indirectly. This study will provide important theoretical basis for analyzing the mechanism of exogenous GR24 in improving salinity-alkalinity tolerance of apple.

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Section: Discussionmentioning

confidence: 99%

Strigolactone alleviates the salinity-alkalinity stress of Malus hupehensis seedlings

Bian

Liu

et al. 2022

Front. Plant Sci.

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“…As we know, plant hormones are signal compounds that regulate the key aspects of plant growth, development, and environmental stress response. Among the nine common plant hormones in plants, five of them, including ABA, auxin, BR, GA, and MeJA, play significant roles in response to heat stress (Waadt et al, 2022). In response to heat stress, BES1, a key transcription factor in the BR signaling pathway, is activated and directly binds to HSEs, known binding sites of HSFs, to induce the expression of HSPs (Albertos et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

Genome-wide analysis of HSP20 gene family and expression patterns under heat stress in cucumber (Cucumis sativus L.)

et al. 2022

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Cucumber is an important vegetable in China, and its yield and cultivation area are among the largest in the world. Excessive temperatures lead to high-temperature disorder in cucumber. Heat shock protein 20 (HSP20), an essential protein in the process of plant growth and development, is a universal protective protein with stress resistance. HSP20 plays crucial roles in plants under stress. In this study, we characterized the HSP20 gene family in cucumber by studying chromosome location, gene duplication, phylogenetic relationships, gene structure, conserved motifs, protein-protein interaction (PPI) network, and cis-regulatory elements. A total of 30 CsHSP20 genes were identified, distributed across 6 chromosomes, and classified into 11 distinct subgroups based on conserved motif composition, gene structure analyses, and phylogenetic relationships. According to the synteny analysis, cucumber had a closer relationship with Arabidopsis and soybean than with rice and maize. Collinearity analysis revealed that gene duplication, including tandem and segmental duplication, occurred as a result of positive selection and purifying selection. Promoter analysis showed that the putative promoters of CsHSP20 genes contained growth, stress, and hormone cis-elements, which were combined with protein-protein interaction networks to reveal their potential function mechanism. We further analyzed the gene expression of CsHSP20 genes under high stress and found that the majority of the CsHSP20 genes were upregulated, suggesting that these genes played a positive role in the heat stress-mediated pathway at the seedling stage. These results provide comprehensive information on the CsHSP20 gene family in cucumber and lay a solid foundation for elucidating the biological functions of CsHSP20. This study also provides valuable information on the regulation mechanism of the CsHSP20 gene family in the high-temperature resistance of cucumber.

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“…To adapt to the salt stress, plants evolved a series of defense systems to prevent the damage during seed germination, including regulating the endogenous hormone levels, improving the activity of the antioxidant enzymes, and activating the salt overly sensitive (SOS) pathway [ 12 , 13 , 14 ]. Among these defense systems, ROS scavenging, mainly mediated by antioxidant enzymes, is an important pathway for improving the abiotic stress tolerance of plants, such as peroxidase (POD), superoxide dismutase (SOD) and catalase (CAT).…”

Section: Introductionmentioning

confidence: 99%

Exogenous Melatonin Improves Seed Germination of Wheat (Triticum aestivum L.) under Salt Stress

Wang

Yan

et al. 2022

IJMS

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Melatonin (MT) can effectively reduce oxidative damage induced by abiotic stresses such as salt in plants. However, the effects of MT on physiological responses and molecular regulation during wheat germination remains largely elusive. In this study, the response of wheat seeds to MT under salt stress during germination was investigated at physiological and transcriptome levels. Our results revealed that application of MT significantly reduced the negative influence of salt stress on wheat seed germination. The oxidative load was reduced by inducing high activities of antioxidant enzymes. In parallel, the content of gibberellin A3 (GA3) and jasmonic acid (JA) increased in MT-treated seedling. RNA-seq analysis demonstrated that MT alters oxidoreductase activity and phytohormone-dependent signal transduction pathways under salt stress. Weighted correlation network analysis (WGCNA) revealed that MT participates in enhanced energy metabolism and protected seeds via maintained cell morphology under salt stress during wheat seed germination. Our findings provide a conceptual basis of the MT-mediated regulatory mechanism in plant adaptation to salt stress, and identify the potential candidate genes for salt-tolerant wheat molecular breeding.

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Plant hormone regulation of abiotic stress responses

Cited by 354 publications

References 229 publications

Strigolactone alleviates the salinity-alkalinity stress of Malus hupehensis seedlings

Strigolactone alleviates the salinity-alkalinity stress of Malus hupehensis seedlings

Genome-wide analysis of HSP20 gene family and expression patterns under heat stress in cucumber (Cucumis sativus L.)

Exogenous Melatonin Improves Seed Germination of Wheat (Triticum aestivum L.) under Salt Stress

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