期刊
JOURNAL OF EXPERIMENTAL BOTANY
卷 73, 期 8, 页码 2290-2307出版社
OXFORD UNIV PRESS
DOI: 10.1093/jxb/erac054
关键词
Cell wall composition; cell wall folding; cell wall remodelling; collapsible cell walls; drought avoidance; plant cell walls; plant glycomics; polysaccharides; succulent plants
资金
- European Union [801199]
- Gront Udviklings-og Demonstrationsprogram (GUDP, GraesProteinFoder project)
- Danmarks Frie Forskningsfond (DFF) [272-07-0152]
This article reviews the current knowledge on the cell walls of drought-avoiding succulent plants and their effects on tissue biomechanics, water relations, and photosynthesis. The study proposes a hypothetical model for regulated cell wall folding in succulent tissues and discusses the future perspectives of methodological development. The mechanistic adaptations of succulent plant cell walls provide insights into cellular water storage and reversible responses to drought and rehydration.
Succulent plants represent a large functional group of drought-resistant plants that store water in specialized tissues. Several co-adaptive traits accompany this water-storage capacity to constitute the succulent syndrome. A widely reported anatomical adaptation of cell walls in succulent tissues allows them to fold in a regular fashion during extended drought, thus preventing irreversible damage and permitting reversible volume changes. Although ongoing research on crop and model species continuously reports the importance of cell walls and their dynamics in drought resistance, the cell walls of succulent plants have received relatively little attention to date, despite the potential of succulents as natural capital to mitigate the effects of climate change. In this review, we summarize current knowledge of cell walls in drought-avoiding succulents and their effects on tissue biomechanics, water relations, and photosynthesis. We also highlight the existing knowledge gaps and propose a hypothetical model for regulated cell wall folding in succulent tissues upon dehydration. Future perspectives of methodological development in succulent cell wall characterization, including the latest technological advances in molecular and imaging techniques, are also presented. The mechanistic adaptations that allow the cell walls of succulent plants to fold provide insights into cellular water storage and the reversible responses to drought and rehydration.
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