Diurnal fluctuations in CO₂ exchange and transpiration in leaves of some Ficus tree species under their natural environments

Diurnal changes in CO₂ exchange and transpiration were studied in leaves of five broadleaved Ficus tree species on a clear dry in May, 1989 when the surrounding air temperature under full sun light averaged 44.7°C. The rates of photosynthesis and transpiration were recorded minimum in leaves of F. religiosa and maximum in F. glomerata whereas the rate of dark respiration was observed minimum in leaves of F. glomerata and maximum in F. bengalensis. Based on the Pearson's correlation coefficient matrix and single linkage clustering analysis it is concluded that the changes in leaf temperature did not substantially affect the rates of CO₂ exchange and transpiration in these Ficus species.