Characteristics of Photosynthesis and Spectral Reflectance in Five Acer Species in the Changbai Mountain

This research compared the light response parameters,spectral reflectance,spectral reflectance indices and pigment content of five Acer species in the Changbai Mountain to analyze the differences and similarities of physiological and ecological characteristics among species,and to explore the relationship between photosynthetic and spectral reflectance characteristics.The results showed that A.mandshuricum was the most adaptable species to the understory light environment with maximum photosynthetic rate(Amax) and light saturation point(LSP) significantly higher than the other four Acer species(P 0.05).There was a spectral reflectance peak around 550 nm,which can be used to detect different species.Both chlorophyll normalized difference index(ChlNDI) and photochemical reflectance index(PRI) of A.mandshuricum were significantly higher than the other four Acer species(P 0.05).The ChlNDI of five Acer species are positively correlated with chlorophyll content,and also related to the Amax.