光合作用对光照和冠层氮分布的适应：一种解读
Acclimation of photosynthesis to light and canopy nitrogen distribution: an interpretation.
作者信息
Thornley J H M
机构信息
Centre for Ecology & Hydrology, Bush Estate, Penicuik, Midlothian EH26 0QB, UK.
出版信息
Ann Bot. 2004 Apr;93(4):473-5. doi: 10.1093/aob/mch051. Epub 2004 Feb 23.
Abstract
BACKGROUND AND AIMS
Acclimation of photosynthesis to light and its connection with canopy nitrogen (N) distribution are considered. An interpretation of a proportionality between light-saturated photosynthesis and local averaged leaf irradiance is proposed by means of a simple model.
MODEL
The model assumes (a) local irradiance drives synthesis of photosynthetic protein from metabolic N; (b) photosynthetic N is slowly degraded over approx. 5-7 d; (c) metabolic N is equally available through the canopy.
CONCLUSIONS
The kinetics of acclimation at different light levels may provide a way of parameterizing and testing the model. The model provides a rationale for the proportionality assumption mentioned above, which, while it is consistent with much experimental work, is valuable because it allows canopy photosynthesis to be calculated analytically.
摘要
背景与目的
探讨光合作用对光照的适应及其与冠层氮（N）分布的关系。通过一个简单模型对光饱和光合作用与局部平均叶片辐照度之间的比例关系进行了解释。
模型
该模型假设（a）局部辐照度驱动光合蛋白从代谢氮合成；（b）光合氮在约5 - 7天内缓慢降解；（c）代谢氮在整个冠层中可同等利用。
结论
不同光照水平下的适应动力学可为模型参数化和测试提供一种方法。该模型为上述比例假设提供了理论依据，虽然这与许多实验工作一致，但很有价值，因为它允许通过解析计算冠层光合作用。
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