井冈山大学学报（自然科学版）Issue(3)：28-33,6.DOI:10.3969/j.issn.1674-8085.2013.03.007
美洲商陆光合光响应曲线及其模型拟合
MODEL FITTING ON LIGHT RESPONSE CURVE OF PHOTOSYNTHESIS FOR PHYTOLACCA AMERICANA
摘要
Abstract
In order to investigate applicability of different light-response models to photosynthetic characteristics in Phytolacca americana, four typical models of light response curve were used to fit the light response curve of its leaf net photosynthesis. The optimal model was screened out by analyzing proximity between the simulated and measured values of photosynthetic parameters. The results showed that light response curves of photosynthesis for P. americana all could be fitted by rectangular hyperbolic model, non-rectangular hyperbolic model, index function model and modified rectangular hyperbolic model with determination coefficients of all R2>0.99, but only modified rectangular hyperbolic model could calculate their saturation irradiances. According to calculated photosynthetic parameters by various models, Pn max estimated by non-rectangular hyperbola was far higher than the measured data, and Pn max fitted by exponential function and modified rectangular hyperbolic model were similar with the measured data. Isat estimated by rectangular hyperbolic model, non-rectangular hyperbolic model and exponential function were far lower than the measured data, only Isat estimated by modified rectangular hyperbolic model were close to the measured data. Therefore,modified rectangular hyperbolic model was the best model in simulating light response curves of photosynthesis and calculate photosynthetic parameters for P. americana. Pn max, Isat, and Ic which were calculated by modified rectangular hyperbolic model was respectively 16.98μmol·m-2·s-1, 1614.54μmol·m-2·s-1 and 14.14μmol·m-2·s-1, which indicated that P. americana could be adaptive for illumination intensity in larger range.关键词
美洲商陆/光响应曲线/直角双曲线修正模型/饱和光强Key words
Phytolacca americana L./light response curve/modified rectangular hyperbolicmodel/saturation irradiance分类
农业科技引用本文复制引用
闫小红,胡文海,王宁,邹谭..美洲商陆光合光响应曲线及其模型拟合[J].井冈山大学学报（自然科学版）,2013,(3):28-33,6.基金项目
国家自然科学基金项目(31240015)；江西省教育厅科技计划项目(GJJ11717) （31240015）
