Food production to meet the demand of future population is solely dependent on cereal grain production, especially rice. High temperature stress is one of the stresses which adversely affect crop production. Being grown in narrow temperature range, a slight increase in the temperature will drastically reduce the yield of rice. Quality seed assures 20-25% increase in yield. Hence, the present investigation was carried out to find the storability of the paddy seed raised under higher temperature by raising five rice varieties viz., MDU 5, ASD 16, CO 51, Anna (R) 4 and ADT 43 in field condition at Coimbatore under two temperature regimes-high (summer, 2016) and normal (rabi, 2016) temperature in field condition and the resultant seeds were harvested and stored in ambient condition in cloth bag. Speed of germination was significantly lower at higher temperature (6.83) than normal temperature (7.84). Germination percentage also recorded significant differences for temperature, varieties and interaction between temperature-variety and variety-storage period. Higher temperature had significantly lower germination (92%) than normal temperature (88%). Temperature regime, varietal differences and interactional effects influenced the vigour index also. Electrical conductivity gradually decreased with the increase in period of storage. As the temperature increased the dehydrogenase activity was found to be decreased (0.389 from 0.541) and alpha amylase activity from.

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