Abstract
Great progresses have been made in understanding of both submergence tolerance in rice (Oryza sativa L.) and the molecular mechanism of tolerance over 4 years. Tolerance of rice plants to submergence is controlled by Submergence-1 (Sub1) locus. Sub1 regulates ethylene- and GA-mediated responsiveness, leading to restriction in carbohydrate consumption and quiescence in shoot elongation during submergence and subsequently causing submergence tolerance. This article reviewed two strategies adopted by rice plants to cope with flooding stress, major physiological factors affecting submergence tolerance, and physical mapping of Sub1 locus, as well as the mechanisms of submergence tolerance, and assessed the prospects of the use of Sub1 in hybrid rice production.
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