Abstract:The photosynthetic characteristics and protective enzymes of Caragana microphylla——a typical species of pinnately compound leaf group, and Caragana stenophylla —— a typical species of pseudo-palmately compound leaf group, were compared and studied in this paper, in order to understand their adaptation mechanism to its habitat and to provide experimental evidence for specific evolution of genus Caragana. The research of photosynthetic characteristics showed that light compensation point (217 μmol photon/(m~2...