Direct and indirect relationships between specific leaf area, leaf nitrogen and leaf gas exchange. Effects of irradiance and nutrient supply
Direct and indirect relationships between specific leaf area, leaf nitrogen and leaf gas exchange. Effects of irradiance and nutrient supply
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DOI：
10.1006/anbo.2001.1536
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发表时间：
2001-11-01
期刊：
影响因子：
4.2
通讯作者：
Shipley, B
中科院分区：
文献类型：
--
作者：
Meziane, D;Shipley, B
我们提出了一系列与特定叶面积、叶片氮含量、净光合作用和气孔导度之间的种间模式相关的竞争路径模型，并根据在受控条件下生长的 22 种草本植物的数据进行测试，并对比辐照度和养分供应率。然后，我们将这些结果与之前的两个数据集（一组基于现场测量，一组基于温室测量）进行比较，以确定结果的稳健性。只有一种模型能够解释四个变量对所有数据集之间的直接和间接影响模式。在该模型中，特定叶面积是直接影响叶片氮水平和净光合速率的强迫变量。叶片氮直接影响净光合速率，进而影响气孔对水的导度。 (C) 2001 年植物学公司年鉴。
We present a series of competing path models relating interspecific patterns between specific leaf area, leaf nitrogen content, net photosynthesis and stomatal conductance and test these against data from 22 species of herbaceous plants grown under controlled conditions with contrasting irradiance and nutrient supply rates. We then compare these results with two previous data sets, one based on field measures and one based on glasshouse measures, to determine the robustness of the results. Only one model was able to account for the patterns of direct and indirect effects between the four variables to all data sets. In this model specific leaf area is the forcing variable that directly affects both leaf nitrogen levels and net photosynthetic rates. Leaf nitrogen then directly affects net photosynthetic rates which in turn then affect stomatal conductance to water. (C) 2001 Annals of Botany Company.