An analysis of the temperature response curves of CO2exchange in the leaves of two temperate and one tropical grass species

摘要

The temperature dependence of carbon dioxide exchange in two temperate grass species,Lolium perenne(S.23) andLolium multiflorum(S.22), and one tropical grass species,Cenchrus ciliaris, have been examined. It has been shown that the decline in the net CO2exchange rate above the optimum temperature is caused, in the case ofC. ciliaris, by denaturation, and, in the case ofL. perenneandL. multiforumby the greater response to temperature of respiration compared with photosynthesis.