Rice is the main staple food, and most of Japonica rice is planted in south of China. As songnen plaint is the largest soda saline alkali soil, that limited the rice planting area and yield, improvement of the alkaline tolerance in rice is playing an important role on the rice production. This paper summarized the effect of alkaline on morphological characteristics, physiological and bio-chemical mechanisms, yield and quality, additionally, QTL and molecular biological level for alkaline tolerance. It was a...