Effects of Geographical and Climatic Factors on the Intrinsic Water Use Efficiency of Tropical Plants: Evidence from Leaf C-13

文献类型： 外文期刊

第一作者： Lin, Xiaoyan

作者： Lin, Xiaoyan;Wang, Jingjing;Liang, Yongyi;Liu, Jiexi;Wang, Hao;Lin, Xiaoyan;Wu, Bingsun;Liang, Yongyi;Lin, Xiaoyan;Wu, Bingsun;Wang, Jingjing;Wang, Guoan;Chen, Zixun;Liu, Jiexi;Wang, Hao

作者机构：

关键词： water use efficiency; carbon isotope composition; leaf carbon content; climate change

期刊名称：PLANTS-BASEL （ 影响因子：4.5； 五年影响因子：4.8 ）

ISSN：

年卷期： 2023 年 12 卷 4 期

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收录情况： SCI

摘要： Understanding the water use efficiency (WUE) and adaptation strategies of plants in high-temperature and rainy areas is essential under global climate change. The leaf carbon content (LCC) and intrinsic WUE of 424 plant samples (from 312 plant species) on Hainan Island were measured to examine their relationship with geographical and climatic factors in herbs, trees, vines and ferns. The LCC ranged from 306.30 to 559.20 mg g(-1), with an average of 418.85 mg g(-1), and decreased with increasing mean annual temperature (MAT). The range of intrinsic WUE was 8.61 to 123.39 mu mol mol(-1) with an average value of 60.66 mu mol mol(-1). The intrinsic WUE decreased with increasing altitude and relative humidity (RH) and wind speed (WS), but increased with increasing latitude, MAT and rainy season temperature (RST), indicating that geographical and climatic factors affect the intrinsic WUE. Stepwise regression suggested that in tropical regions with high temperature and humidity, the change in plant intrinsic WUE was mainly driven by WS. In addition, the main factors affecting the intrinsic WUE of different plant functional types of plants are unique, implying that plants of different plant functional types have distinctive adaptive strategies to environmental change. The present study may provide an insight in water management in tropical rainforest.

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