Through a gradient experiment controlling CO2 concentration and illumination intensity, the photosynthetic physiological characters of two C4 pathway plants, Setaria viridis and Pennisetum flaccidum, w...Through a gradient experiment controlling CO2 concentration and illumination intensity, the photosynthetic physiological characters of two C4 pathway plants, Setaria viridis and Pennisetum flaccidum, were measured on the Songnen Plains of China. The results showed that the net photosynthetic rate (Pn) of S.viridis was higher than P.flaccidum. As the CO2 concentration increased, Pn of the two species both increased until the CO2 concentration reached approximately 600 μmol/mol, after which Pn decreased. At the same time, the light compensation points of the two species gradually dropped. This is related to the inhibition of dark respiration with high CO2 concentration.展开更多
文摘Through a gradient experiment controlling CO2 concentration and illumination intensity, the photosynthetic physiological characters of two C4 pathway plants, Setaria viridis and Pennisetum flaccidum, were measured on the Songnen Plains of China. The results showed that the net photosynthetic rate (Pn) of S.viridis was higher than P.flaccidum. As the CO2 concentration increased, Pn of the two species both increased until the CO2 concentration reached approximately 600 μmol/mol, after which Pn decreased. At the same time, the light compensation points of the two species gradually dropped. This is related to the inhibition of dark respiration with high CO2 concentration.
