降水、太阳辐射及其相互作用改变了全球范围内被子植物的叶片水力效率-安全权衡

IF 8.3 1区生物学 Q1 PLANT SCIENCES

New Phytologist Pub Date : 2024-10-18 DOI:10.1111/nph.20213

Yi Jin, Qing Ye, Xiaorong Liu, Hui Liu, Sean M. Gleason, Pengcheng He, Xingyun Liang, Guilin Wu

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引用次数: 0

摘要

理论上，水力效率和安全性之间存在权衡。我们汇编了全球 81 个地点 362 个物种的叶片水力效率和安全数据集，对这两个性状进行了 280 次配对观测，并测试了气候是否与偏离所提出的权衡有关。年平均降水量和太阳辐射（SR）改变了这种权衡。来自干燥和高SR栖息地（如沙漠和热带稀树草原）的物种一般位于权衡线之上，表明这些物种的叶片水力安全和效率往往高于来自湿润和低SR栖息地（如亚热带季风森林和山地雨林）的物种，后者位于权衡线之下。叶脉密度高、单位面积干叶质量大、渗透调节能力强的叶片在不影响水力效率的情况下提高了安全性。叶片水平上水力效率-安全性权衡的差异可能有利于植物在特定生境中生存，并能在全球范围内对叶片水力适应策略进行更细致的观察。

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Precipitation, solar radiation, and their interaction modify leaf hydraulic efficiency–safety trade-off across angiosperms at the global scale

In theory, there is a trade-off between hydraulic efficiency and safety. However, the strength and direction of this trade-off at the leaf level are not consistent across studies, and habitat climate may impact this trade-off.
We compiled a leaf hydraulic efficiency and safety dataset for 362 species from 81 sites world-wide, with 280 paired observations of both traits, and tested whether climate was associated with departure from the proposed trade-off.
The leaf hydraulic efficiency–safety trade-off was weak (R² = 0.144) at the global scale. Mean annual precipitation and solar radiation (SR) modified the trade-off. Species from dry and high SR habitats (e.g. desert and tropical savanna) were generally located above the trade-off line, indicating that these species tended to have higher leaf hydraulic safety and efficiency than species from wet habitats with low SR (e.g. subtropical monsoon forest and montane rainforest), which were located below the trade-off line. Leaves with high vein density, dry leaf mass per area, and osmotic regulation enhanced safety without compromising hydraulic efficiency.
Variation in the hydraulic efficiency–safety trade-off at the leaf level likely facilitates plant survival in specific habitats and allows for a more nuanced view of leaf hydraulic adaption strategies at the global scale.

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来源期刊

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.