Hygroscopic stem reshaping promotes long-distance plant dispersal.

IF 8.3 1区 生物学 Q1 PLANT SCIENCES
New Phytologist Pub Date : 2025-05-23 DOI:10.1111/nph.70225
Yuhong Luo,Zhenjie Guo,Jiquan Chen,Wenyuan Ruan,Xingliang Xu,Le Li,Yufan Bao,Nuo Xu,Xiaoping Xin,Keke Yi,David J Eldridge,Yuchun Yan
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引用次数: 0

Abstract

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.
茎的吸湿性重塑促进了植物的远距离传播。
锁丝草是一种广泛分布于欧亚草原的先驱翻滚植物。通过茎杆整形实现长距离风散。然而,这种扩散策略的潜在生态适应机制仍未被探索。结合野外和实验室观察,我们发现植物物候、细胞壁发育、水供应和空气动力学适应这四个协调的过程相互作用,促进了这一欧亚草原特有物种的风速。具体来说,具有异质微纤维排列的细胞壁的发育在与种子成熟同步发生的吸湿性茎重塑中起着关键作用。值得注意的是,随后的干燥和多风季节完美地遵循了这两个同步过程,为茎杆重塑提供了理想的脱水条件,并提高了长距离传播的空气动力学效率。该模型创新性地展示了微观细胞壁结构如何推动宏观扩散能力和环境适应,最终增强生态系统对环境变化的适应能力。综上所述,这些结果表明,在退化和干旱的生态系统中,促进沙刺草的引种和种植是有潜力的。此外,这一新发现的机制为未来通过分子育种技术开发具有更好传播能力的草本植物品种提供了有价值的研究方向。
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来源期刊
New Phytologist
New Phytologist 生物-植物科学
自引率
5.30%
发文量
728
期刊介绍: New Phytologist is an international electronic journal published 24 times a year. It is owned by the New Phytologist Foundation, a non-profit-making charitable organization dedicated to promoting plant science. The journal publishes excellent, novel, rigorous, and timely research and scholarship in plant science and its applications. The articles cover topics in five sections: Physiology & Development, Environment, Interaction, Evolution, and Transformative Plant Biotechnology. These sections encompass intracellular processes, global environmental change, and encourage cross-disciplinary approaches. The journal recognizes the use of techniques from molecular and cell biology, functional genomics, modeling, and system-based approaches in plant science. Abstracting and Indexing Information for New Phytologist includes Academic Search, AgBiotech News & Information, Agroforestry Abstracts, Biochemistry & Biophysics Citation Index, Botanical Pesticides, CAB Abstracts®, Environment Index, Global Health, and Plant Breeding Abstracts, and others.
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