南亚热带生境下 6 种紫珠属植物的光响应模型拟合分析.

In this study, four light models including rectangular hyperbola model, non-rectangular hyperbolic model, modified rectangular hyperbolic model and exponential model were jointly adopted to evaluate the photosynthetic parameters and light response fitting curves of six Callicarpa Linn. species in southern subtropical regions. By comparison of the light saturation point (LSP), light compensation point (LCP), maximum net photosynthetic rate (P), dark respiration rate (R) and apparent quantum efficiency (AQE), as well as the coefficient of determination (R), root mean square error (RMSE) and mean absolute error (MAE) derived from the four models, the most suitable light response models for these six plants were obtained. The results demonstrated that the modified rectangular hyperbolic model performed the best fitting ability for the photosynthetic study of the six Callicarpa species, and the highest light utilization ability under both strong and weak light belonged to C. formosana, and the highest photosynthetic efficiency was found in C. japonica var. Luxurians. In summary, these six Callicarpa species showed both interspecific variability and interspecific similarity in light utilization capacity, and the four light response models differed greatly in the calculation of the photosynthetic potential, however, there was consistency in the model's goodness-of-fit and fitting accuracy. [ABSTRACT FROM AUTHOR]