文献类型：期刊文献

中文题名：光合作用光响应曲线模型选择及低光强属性界定

英文题名：Selection of Models of Photosynthesis in Response to Irradiance and Definition of Attribute of Weak Light

作者：段爱国[1] 张建国[1]

第一作者：段爱国

机构：[1]中国林业科学研究院林业研究所,国家林业局林木培育重点实验室,北京100091

年份：2009

卷号：22

期号：6

起止页码：765-771

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：国家林业局林业重点工程科技支撑项目“西南困难立地抗逆性优良乔灌木树种及快繁技术试验示范”

语种：中文

中文关键词：光合作用;光响应曲线;模型选择;表观光合量子效率;光能利用效率

外文关键词：photosynthesis; light response curve; selection of models; apparent quantum yield of photosynthesis; light-using efficiency

分类号：S718.3

摘要：采用抛物线、直角双曲线、非直角双曲线及直角双曲线修正式等数学函数对金沙江干热河谷3种不同类型植物材料的光合光响应曲线进行了拟合,提出一种分段函数用以拟合实测值并求算光合作用参数,构建了一种有关表观光合量子效率求算的弱光区域的确定方法,得到3点主要结论:(1)5种拟合方式中,分段函数与直角双曲线修正式对3种不同类型的光合光响应曲线均具有良好的拟合效果;(2)直角与非直角双曲线拟合得到的光合参数Pmax、LCP、Rd与实测值接近,但对LSP的估计值总是远低于实测值,直角双曲线修正式适合用于出现光抑制现象的曲线的模拟及其光合参数的求解,但无法得到饱和趋近型曲线的光合特征参数,分段函数求解的不同类型曲线的特征参数均与实测值较为接近;(3)以光合光响应曲线上光能利用效率的下降位点来界定植物表观光合速率随光强呈线性增长的弱光区域是可行的,且具相当的理论可释性。
Parabola, rectangular hyperbola, non-rectangular hyperbola, modified rectangular hyperbola and a subsection function were adopted to model the light-response curve for three different types of vegetations in the dry-hot river valley of Jinsha River, and a method was built to confirm the weak light region which related to apparent quantum yield of photosynthesis. Three main conclusions were gotten： （1）In five simulation methods, only subsection function andmodified rectangular hyperbola had good simulation effect for three different types of light response curves; （2）The parameters Pmax ,LCP, and Rd from rectangular hyperbola and non-rectangular hyperbola were near to the observations, but the estimates of LSP were always far lower than the observations, modified rectangular hyperbola was adapted tomodel the curves with phenomenon of light restrain and the estimation of photosynthetic parameters, but this method could not get the photosynthetic parameters for up-raising curve, the parameters estimated by subsection function for different types of curves were all near to the observations; （3） It was relatively theoretical to view the light range divided by thedescending point of light-using efficiency on light response curve as the weak light range, the apparent quantum yield of photosynthesis was often lowly estimated when the weak light region could not be confirmed.