Journal
PLANT CELL REPORTS
Volume 41, Issue 3, Pages 519-533Publisher
SPRINGER
DOI: 10.1007/s00299-021-02720-6
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Funding
- Postdoctoral Hungarian State Scholarship 2020/2021, Tempus Public Foundation [AK-00205-004/2020]
- Bilateral State Scholarship 2019/2020, Tempus Public Foundation [AK-00210-002/2019]
- Department of Biotechnology, Ministry of Science and Technology, Government of India [BT/HRD/35/02/2006]
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DHN proteins accumulate in plants during drought stress and play various roles in enhancing plant drought tolerance, including improving water retention capacity, maintaining chlorophyll content, and activating detoxification processes.
Drought stress-induced crop loss has been considerably increased in recent years because of global warming and changing rainfall pattern. Natural drought-tolerant plants entail the recruitment of a variety of metabolites and low molecular weight proteins to negate the detrimental effects of drought stress. Dehydrin (DHN) proteins are one such class of proteins that accumulate in plants during drought and associated stress conditions. These proteins are highly hydrophilic and perform multifaceted roles in the protection of plant cells during drought stress conditions. Evidence gathered over the years suggests that DHN proteins impart drought stress tolerance by enhancing the water retention capacity, elevating chlorophyll content, maintaining photosynthetic machinery, activating ROS detoxification, and promoting the accumulation of compatible solutes, among others. Overexpression studies have indicated that these proteins can be effectively targeted to mitigate the negative effects of drought stress and for the development of drought stress-tolerant crops to feed the ever-growing population in the near future. In this review, we describe the mechanism of DHNs mediated drought stress tolerance in plants and their interaction with several phytohormones to provide an in-depth understanding of DHNs function.
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