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Hygroscopic stem reshaping promotes long-distance plant dispersal

文献类型： 外文期刊

作者： Luo, Yuhong 1 ; Guo, Zhenjie 2 ; Chen, Jiquan 3 ; Ruan, Wenyuan 1 ; Xu, Xingliang 4 ; Li, Le 1 ; Bao, Yufan 1 ; Xu, Nuo 1 ; Xin, Xiaoping 1 ; Yi, Keke 1 ; Eldridge, David J. 5 ; Yan, Yuchun 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, State Key Lab Efficient Utilizat Arid & Semiarid A, Beijing 100081, Peoples R China

2.Xilinhot Natl Climate Observ, Xilinhot 026000, Inner Mongolia, Peoples R China

3.Michigan State Univ, Ctr Global Change & Earth Observat, Dept Geog Environm & Spatial Sci, E Lansing, MI 48823 USA

4.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China

5.Univ New South Wales, Ctr Ecosyst Sci, Sch Biol Earth & Environm Sci, Sydney, NSW 2052, Australia

关键词： Cleistogenes squarrosa; hygroscopic reshaping; microfibril arrangement; stem curling; tumble plant

期刊名称：NEW PHYTOLOGIST （ 影响因子：8.1； 五年影响因子：10.3 ）

ISSN： 0028-646X

年卷期： 2025 年 247 卷 2 期

页码：

收录情况： SCI

摘要： Cleistogenes squarrosa is a pioneer tumble plant widely distributed across the Eurasian steppes. It achieves long-distance wind dispersal through stem reshaping. However, the underlying ecological adaptation mechanisms of this dispersal strategy remain unexplored. Combining with field and laboratory observations, we revealed that four coordinated processes - plant phenology, cell wall development, water supplies, and aerodynamic adaptations - interactively facilitate the anemochory of this endemic species in the Eurasian steppes. Specifically, the development of the cell wall with heterogeneous microfibril arrangement plays a critical role in hygroscopic stem reshaping, which occurs in synchrony with seed maturation. Remarkably, the subsequently dry and windy season perfectly follows these two synchronized processes, providing ideal dehydration conditions for stem reshaping and enhancing aerodynamic efficiency for long-distance dispersal. This model for long-distance dispersal innovatively showcases how microscopic cell wall structure propels macroscopic dispersal capabilities and environmental adaptation, ultimately enhancing ecosystem resilience to environmental changes. Collectively, these results indicate the potential for promoting the introduction and cultivation of C. squarrosa to support the restoration of degraded and arid ecosystems. Moreover, this newly identified mechanism provides a valuable direction for future research aimed at developing herbaceous plant varieties with improved dispersal capabilities through molecular breeding techniques.

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