Effect of saline--alkali soil from songnen plain on chlorophyll content in rice

Effect of different saline-alkali stress on chlorophyll, chlorophyll a and chlorophyll b contents of two rice cultivars (Ji 89-45 and Jinongda 10) were studied with pot experiments. The chlorphyll contents were low at the early growth stage,then increased gradually and reached the highest value at the flowering and milk stage, and no difference in change tendency of chlorphyll content between the two cultivars was found. Chlorphyll contents under the stress treatment were lower than those under control treatment. In addition, the variable range of chlorphyll a content was always wider than that of chlorophyll b content.