Interactions Among Nitrogen, Carbon, Plant Shape, and Photosynthesis
Interactions Among Nitrogen, Carbon, Plant Shape, and Photosynthesis
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氮、碳、植物形状和光合作用之间的相互作用
DOI：
10.1086/285881
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
J. Pastor
中科院分区：
文献类型：
--
作者：
Y. Cohen;J. Pastor
随着人们向北旅行，遇到更低的太阳角和更少的缺氮土壤，圆锥形树冠的常绿植物群落的优势增加，与来自相同环境的落叶物种相比，叶片中单位氮的光合作用具有更有利的碳平衡。尽管观察到了这些生物地理模式和植物特征之间的相关性，但没有量化模型来解释它们。我们从碳平衡和氮素吸收的耦合常微分方程组中推导出这样一个模型，将植物性状之间相关性的定性平衡预测与实验结果进行了比较。该模型表明，许多实验观察到的植物性状之间的相关性(例如，光合作用和含氮量)最好被视为对植物生长的限制，而不是因果关系。我们使用该模型来解释植物形态和生理中的一些大尺度生物地理趋势。我们还为验证模型预测的实验提供了建议。
As one travels northward and encounters lower sun angles and more nitrogen-poor soils, there is an increased dominance of plant communities by evergreens with conical canopies and a more favorable carbon balance in photosynthesis per unit nitrogen in leaves compared with deciduous species from the same environments. Despite the observed correlations between these biogeographic patterns and plant traits, there is no quantitative model that accounts for them. We derive such a model from coupled ordinary differential equations of carbon balance and nitrogen uptake, comparing qualitative equilibrium predictions of correlations among plant traits with experimental findings. The model suggests that many of the experimentally observed correlations among plant traits (e.g., photosynthesis and nitrogen content) are best viewed as constraints on plant growth rather than cause and effect. We use the model to account for some large-scale biogeographic trends in plants morphology and physiology. We also provide suggestions for experiments to test the model predictions.