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Phytohormone signaling and crosstalk in regulating drought stress response in plants

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Abstract

Phytohormones are ubiquitously involved in plant biological processes and regulate cellular signaling pertaining to unheralded environmental cues, such as salinity, drought, extreme temperature and nutrient deprivation. The association of phytohormones to nearly all the fundamental biological processes epitomizes the phytohormone syndicate as a candidate target for consideration during engineering stress endurance in agronomically important crops. The drought stress response is essentially driven by phytohormones and their intricate network of crosstalk, which leads to transcriptional reprogramming. This review is focused on the pivotal role of phytohormones in water deficit responses, including their manipulation for mitigating the effect of the stressor. We have also discussed the inherent complexity of existing crosstalk accrued among them during the progression of drought stress, which instigates the tolerance response. Therefore, in this review, we have highlighted the role and regulatory aspects of various phytohormones, namely abscisic acid, auxin, gibberellic acid, cytokinin, brassinosteroid, jasmonic acid, salicylic acid, ethylene and strigolactone, with emphasis on drought stress tolerance.

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Acknowledgements

The research is supported by the DST-INSPIRE project grant, Department of Science and Technology (DST) Government of India (File no: DST/INSPIRE/04/2018/003425 to PS and DST/INSPIRE/04/2015/002873 to HK).

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Correspondence to Prafull Salvi.

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All the authors have read the manuscript and have no conflicts of interest to declare.

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Communicated by Aryadeep Roychoudhury.

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Salvi, P., Manna, M., Kaur, H. et al. Phytohormone signaling and crosstalk in regulating drought stress response in plants. Plant Cell Rep 40, 1305–1329 (2021). https://doi.org/10.1007/s00299-021-02683-8

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  • DOI: https://doi.org/10.1007/s00299-021-02683-8

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