Analysis of Salinity Effect on Chlorophyll Rate, Florescence Indices and Grain Yield of Some Rice Cultivars

Rice (Oryza sativa L.) is providing food of half of the world population, and in some regions salinity stress reduces yield of this plant. In order to develop planting of rice in regions with saline water or fields, chlorophyll rate, chlorophyll fluorescence indices and grain yield of some rice cultivars were evaluated in summer, 2012, at the farm of college of Agriculture, at Yasouj University. The experiment was performed in split plot in a randomized complete block design with three replications. Main plot included 4 levels of salinity, and the subplot included 11 rice cultivars. Results from the analysis of variance showed that the effect of salinity stress on chlorophyll fluorescence indices was non-significant but was highly significant (p