UV-B Response of Oryza sativa L. var. ADT(R) - 45 Seedlings

Investigations on morphological, physiological and biochemical changes in protein pattern were made in the seedlings of Oryza sativa L. var. ADT(R) – 45 following regular short time (10 and 20 min/day) ultraviolet B irradiation. During the initial period of ultraviolet B irradiation several morphological changes such as reduction in leaf size and increase in leaf thickness occurred. The rate of photosynthesis decreased upon ultraviolet B treatment which was found to be due to a direct action on the light reactions. The UV- B exposed seedlings of Oryza sativa L. var. ADT(R) – 45 exhibited substantial changes in protein levels. Protein profile changes have been manifested as tolerant, sensitive and induced proteins.