Analysis on Chlorophyll Content of Nature Brown and Green Cotton Leaves
Based on the analysis on the chlorophyll content of naturally colored cotton leaves during the different growth periods, and the UV spectrum of naturally colored cotton photosynthesis pigment, this paper claims that the dynamic trends of chlorophyll cotton including a and b and (a+b) in naturally colored cotton leaves are the same as that in white cotton.The difference of the chlorophyll content in unit weight leaves between the brown colored cotton and the white cotton is not obvious,while the chlorophyll content of green colored cotton leaves is lower than that of the white cotton.Similarly,the total amount of chlorophyll in single leaf of the white cotton is higher than that of the naturally colored cotton,while the total amount of chlorophyll in single leaf of brown colored cotton is close to that of green colored cotton. The ratio of chlorophyll a/b of all those three cottons gradually declines from seedling stage to full-bloom stage,then gradually rises from full-bloom stage to boll opening stage. The UV absorption peaks of the naturally colored cotton photosynthesis pigment are very similar. The UV absorption peaks emerge in 416 nm,462 nm and 672 nm,respectively.