Effect of drought stress on chlorophyII fluorescence induction kinetics in leaves of different rice genotypes

The effects of drought stress on the chlorophyll fluorescence induction kinetics of rice varieties were studied by using PFM102 chlorophyll fluorometer. The results showed that chlorophyll fluorescence parameters including F0, Fv/F0, Fv/Fm, and T1/2 decreased in response to drought stress; there were obvious differences on change of chlorophyll fluorescence parameters among different genotypes; the chlorophyll fluorescence parameters were closely related each other. It was concluded that the change of photosynthetic the characteristics, i.e. the chlorophyll fluorescence parameters of F0, Fv/F0, Fv/Fm and T1/2, was the adaptation effect of rice to drought stress. 