Vol. 16 No. 2
Effect of high temperature stress on seed filling and nutritional quality of rice (Oryza sativa L.)
Author(s): K. PRAVALLIKA, C. ARUNKUMAR, A. VIJAYKUMAR, R. BEENA AND V. G. JAYALEKSHMI
Abstract: The present study aims to disclose the impact of high temperature stress on the seed filling parameters, enzyme activity, and yield of three rice varieties. Seed filling parameters recorded at milky and dough stage revealed that high temperature stress condition increased the amount of reducing sugar, carbohydrates, starch, and flavonoids. However, amylose, seed protein, and anthocyanin showed reduction under high temperature stress condition. Activity of invertase was reduced under high temperature condition compared to control in all varieties from 15 to 30 days after 50% flowering. Viability of the pollen was negatively influenced by high temperature (82.653 %). The average seed yield (18.733 g/plant) and spikelet fertility (74.245 %) showed a decline under high temperature.
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