PHYSIOLOGICAL DISSECTION OF SUBMERGENCE TOLERANCE INRICE UNDER ISLAND ECOSYSTEMSrividhya, S. and Singh, P.K.Abstract Rice cultivation in the islands encounters submergence at various growth stages leading to Substantialyield and quality loss. Continuous and heavy rainfall during a short-span leads to water logging andcontinuous submergence even up to five days. Developing submergence/flooding tolerant versions ofadapted elite rice genotypes helps to reduce the yield loss in these areas. The present study was undertakento evaluate the physiological response of rice genotypes adapted to island conditions under submergencestress. The outcome of the study will help to identify promising donor for breeding submergence stresstolerance cultivars with the background of popular rice varieties of A&N islands. The tolerant genotypeslike Black Burma, IR64 Sub1, revealed that they posses many of the adaptive traits like slower elongationduring submergence, chlorophyll retention, higher stem reserves post submergence, higher survival percentage required for the flood-prone island ecosystem. |