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Specific metabolic and cellular mechanisms of the vegetative desiccation tolerance in resurrection plants for adaptation to extreme dryness

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Substantial advancements have been made in our comprehension of vegetative desiccation tolerance in resurrection plants, and further research is still warranted to elucidate the mechanisms governing distinct cellular adaptations.

Abstract

Resurrection plants are commonly referred to as a small group of extremophile vascular plants that exhibit vegetative desiccation tolerance (VDT), meaning that their vegetative tissues can survive extreme drought stress (> 90% water loss) and subsequently recover rapidly upon rehydration. In contrast to most vascular plants, which typically employ water-saving strategies to resist partial water loss and optimize water absorption and utilization to a limited extent under moderate drought stress, ultimately succumbing to cell death when confronted with severe and extreme drought conditions, resurrection plants have evolved unique mechanisms of VDT, enabling them to maintain viability even in the absence of water for extended periods, permitting them to rejuvenate without harm upon water contact. Understanding the mechanisms associated with VDT in resurrection plants holds the promise of expanding our understanding of how plants adapt to exceedingly arid environments, a phenomenon increasingly prevalent due to global warming. This review offers an updated and comprehensive overview of recent advances in VDT within resurrection plants, with particular emphasis on elucidating the metabolic and cellular adaptations during desiccation, including the intricate processes of cell wall folding and the prevention of cell death. Furthermore, this review highlights existing unanswered questions in the field, suggests potential avenues for further research to gain deeper insights into the remarkable VDT adaptations observed in resurrection plants, and highlights the potential application of VDT-derived techniques in crop breeding to enhance tolerance to extreme drought stress.

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Funding

This work was supported by the National Key R&D Program of China (2021YFE0102600), Shandong Provincial Natural Science Foundation (ZR2022MC073), Chinese Academy of Science President’s International Fellowship Initiative Grant (2021PB0101), the Special Project for Discipline Construction of Weifang University of Science and Technology (2021XKJS28), Beijing Higher Education Level Talents Cross-cultivation Program “Practical Training Program” (PXM2020_014207_000009) and Beijing Natural Science Foundation (5222021).

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Correspondence to Xin Deng.

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Communicated by Gerhard Leubner.

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Liu, J., Wang, Y., Chen, X. et al. Specific metabolic and cellular mechanisms of the vegetative desiccation tolerance in resurrection plants for adaptation to extreme dryness. Planta 259, 47 (2024). https://doi.org/10.1007/s00425-023-04323-9

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  • DOI: https://doi.org/10.1007/s00425-023-04323-9

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