Effect of salt stress on chlorophyll a and b content: the effective pigments in wheat plant photosynthesis

A pot experiment was conducted by two variables: 1) levels of salinity (EC= 0,8,12 and 16 dsm-1) and 2) cultivars of wheat (Fong, Chamran, Star and Kharchia) in a factorial statistical design based on RCB with three replications. Results showed that, at the end of the growth period, in all four cultivars reference leaf Na+ ion content increased by increasing salinity intensity. Moreover, results of chlorophyll a content showed that Fong, Chamran, Star and Kharchia chlorophyll a content increased by increasing salt concentration. Though, Fong and Star rises were not significant. The most decline compared to control obtained in Kharchia and Chamran respectively. Furthermore, the most decline chlorophyll b showed in Fong and Chamran had by salt stress intensity increasing, while Kharchia had no significant changes compared to the control even in the highest level of salinity.

کلیدواژه ها:

Salt stress ، Wheat ، Na+ ion ، Chlorophyll a ، Chlorophyll b