叶子元素组与多种森林生态系统的叶子用水策略有密切联系:特征协调和反射光谱的见解
Nan Yang1,2, Fengqi Wu1,2,3, Lawren Sack4
1State Key Laboratory of Forage Breeding-by-Design and Utilization, Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, China.
Plant, cell & environment
|December 5, 2025
概括
叶子内在用水效率 (iWUE) 与不同森林的叶子特征和元素组成有关. 叶子反射光谱有效地预测iWUE和相关的特征关系.
科学领域:
- 植物生态生理学植物生态生理学
- 生物地质化学生物地质化学
- 遥感是一种远程传感.
背景情况:
- 叶子内在用水效率 (iWUE) 平衡了碳增加和水损失,受叶子特征的影响,如最大碳氧化能力 (Vc,max) 和口腔导电性.
- 了解iWUE与不同森林类型的叶片元素组成 (元素组) 的联系至关重要,但仍然不清楚.
研究的目的:
- 分析温带,亚热带和热带森林82个树种的iWUE变异性及其与Vc,max,口腔导电性和叶片元素的关联.
- 评估叶子反射光谱作为评估iWUE变异性和特征-iWUE关系的工具.
主要方法:
- 使用叶子碳同位素估计的iWUE.
- 由叶片干物质 (Δ18O) 中的18O丰富度估计的口腔导电性.
- 分析了叶子元素度,Vc,max,叶子每面积质量 (LMA) 和叶子反射光谱.
主要成果:
- 铁,,和的Vc,max,Δ18O,LMA和叶子度与iWUE变异性有很强的联系.
- 气候因素影响了特征-iWUE共变,LMA直接影响了iWUE.
- 叶子反射光谱学准确地预测了iWUE (R2 = 0.83),并揭示了一致的特征-iWUE关系.
结论:
- 叶子元素和iWUE之间存在强烈的联系,跨越各种森林生物群.
- 叶子反射光谱是一种有前途的工具,用于表征iWUE和特征-iWUE关系,帮助森林碳和水循环建模.
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