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Simulation of Photosynthetic Response to Light Intensity and Temperature for Leaf of Paeonia suffruticosa

MENG Jun,CHEN Yun-long,LI Hui-qiang,WU Bing-yue,DUAN Xiao-yan,LIU Zi-yang(Life Science Department of Luoyang Normal University,Luoyang 471022,China)  
Using LCpro+ portable photosynthesis system,photosynthesis rate and stomatal conductance of leaves of Luoyanghong-a tree peony variety were measured under controlled environmental conditions.The results showed that the photosynthetic response to light intensity is influenced by temperature ob-viously.Light intensity and leaf temperature was fitted using axial hyperbolic model,and the fitting between measured and simulated data is good,for the root mean square error(RMSE)=1.4904.On the basis of this model,the light compensation point,initial utilization of light energy,maximum photosynthetic rate and respiratory rate were calculated and equal to 16.99,0.02863,9.81107 and 0.46435μmol/(m2·s) respectively.The simulated curve indicated that the hyperbolic model could be used to simulate photosynthesis when the light is below the light saturation point,and is convenient to compare the results among different studies.
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