Photosynthetic Units and Carbon Assimilation in Leaves of Grain Sorghum under Different Light Intensities

概要

論文の詳細を見る
The Cyt f and P700 contents in leaves of three Sorghun varieties were measured, in relation to their carbon assimilation, under different light intensities during growth. At the maximum irradiation used (1,800 μE m^<-2> s^<-1>) the ratio of P700 to Cyt f was close to unity, whereas under low irradiation (450 μE m^<-2> s^<-1>) the ratio of P700 to Cyt f ranged from two to three. A strikingly positive correlation existed between the P700 contents of the leaves and their rates of carbon dioxide fixation, dry matter production and Cyt f contents, only when the plants were grown under high light intensities. The P700 content of the leaves in plants grown under low irradiation was unrelated to the contents of Cyt f Thus, at a high light intensity there is a close relationship between the Cyt f and P700 levels, but at low intensities the amounts of electron carriers and the reaction centre are independent.
日本植物生理学会の論文