光合作用
羧化
鲁比斯科
二氧化碳
核酮糖
呼吸
植物
限制
光合能力
化学
特异性因子
光呼吸
气孔导度
蒸腾作用
叶绿素荧光
固碳
叶绿素
光合有效辐射
园艺
生物
生物化学
机械工程
核糖核酸
有机化学
RNA依赖性RNA聚合酶
基因
工程类
催化作用
作者
Thomas D. Sharkey,Carl J. Bernacchi,Graham D. Farquhar,Eric L. Singsaas
标识
DOI:10.1111/j.1365-3040.2007.01710.x
摘要
ABSTRACT Photosynthetic responses to carbon dioxide concentration can provide data on a number of important parameters related to leaf physiology. Methods for fitting a model to such data are briefly described. The method will fit the following parameters: V cmax , J , TPU , R d and g m [maximum carboxylation rate allowed by ribulose 1·5‐bisphosphate carboxylase/oxygenase (Rubisco), rate of photosynthetic electron transport (based on NADPH requirement), triose phosphate use, day respiration and mesophyll conductance, respectively]. The method requires at least five data pairs of net CO 2 assimilation ( A ) and [CO 2 ] in the intercellular airspaces of the leaf ( C i ) and requires users to indicate the presumed limiting factor. The output is (1) calculated CO 2 partial pressure at the sites of carboxylation, C c , (2) values for the five parameters at the measurement temperature and (3) values adjusted to 25 °C to facilitate comparisons. Fitting this model is a way of exploring leaf level photosynthesis. However, interpreting leaf level photosynthesis in terms of underlying biochemistry and biophysics is subject to assumptions that hold to a greater or lesser degree, a major assumption being that all parts of the leaf are behaving in the same way at each instant.
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