Ecology, Environment and Conservation Paper

COMBINED EFFECT OF UV- RADIATION (280-320NM) AND WATER STRESS ON RED GRAM

Natarajan Shanthi and Govindaswarny Kulandaivelu

Abstract

After 5 days of growth under well water condition red gram seedlings were subjected to water stress and long term ultraviolet-B radiation (4hrs/day).The changes in growth, photosynthetic activity and chloroplast protein were studied. Compared to ambient, UV-B irradiation considerably decreased the plant growth, photosynthetic activity and chloroplast polypeptide expression. Such decrease was very high in combine stress (water stress UV-B radiations) plant than stress factors applied separately. The water stress treatment increase plants growth and other physiological process significantly compare to control, UV-B radiation and combine stress treated plant. Water stress not that much effective but it combine with UV- B treatment significantly affect all parameters.