Physiology of leaf and stem were studied on submergent in rice M202 and M202(Sub1A) (transfer sub1A of M202). The objective of this research was to study the effect of submergence-1A to expression in rice submerged conditions. 21 days old seedling rice was divided into 2 groups. The first group was submerged under 90 cm for 7 and 14 days. The second group was used as control. Submerged under 90 cm for 7 day Submergence tolerance than Submerged under 90 cm for 14 day.