Comparison of two photosynthesislight response curvefitting models of four Artemisia species

The light response curve of four Artemisia species inchcding A.vestita, A.mongolidca, A.japonica and A.roxburghiana were measured, and parameters of photosynthesislight response curve were simulated by nonrectangle hyperbolae and rectangle hyperbolae functions in this study. The results showed that 、Rd、Lsp from rectangle hyperbolae function were higher than those from monrectangle hyperbolae function, and there were significant differences in of different species. These differences revealed that nonrectangle hyperbolae function might have more physiological meaning under low light condition. Furthermore, both A.vestita and A.japonica exhibited high photosynthesis capacity, but A.japonica might have higher resource utilization under low light condition. A.mongolica and A.roxburghiana showed lower maximum photosynthesis capacity, lower Lcp and Lsp than others. In a word, it is necessary to consider the location environmental conditions which made these plant species more useful.