Effect of UV-B Radiation on Nitrate, Phosphate and Ammonium Uptake in Chlorella vulgaris  

作　　者：V. Prasad 

机构地区：[1]Department of Botany, Thakur Ram M. Campus, Birgunj, Tribhuvan University, Kathmandu 44613, Nepal

出　　处：《Journal of Environmental Science and Engineering》2011年第9期1141-1146,共6页环境科学与工程（英文版）

摘　　要：UV-B exposure （312 nm and 2.5 W.m^-2） caused 50 percent killing m Chlorella at lO mln and complete Killing at oo ram. Nitrate and phosphate uptakes were faster under UV-B irradiation than in fluorescent light. Short exposure of UV-B stimulated nitrate and phosphate uptakes but inhibited ammonium uptake. Ammonium uptake was inhibited upto 30 min and thereafter increased and become constant after 60 min UV-B exposure. UV-B stimulated the nitrate uptake in deficient cells. Interestingly, there was rapid stimulation of nitrate uptake in deficient medium after 30 min UV-B treatment. Darkness inhibited the uptake mechanism but the fluorescent light enhanced the rate of nitrate uptake stimulation in deficient cells of Chlorella vulgaris.

关 键 词：UV-B NITRATE AMMONIUM phosphate uptake deficient medium CHLORELLA 

分 类 号：S852.2[农业科学—基础兽医学] S63[农业科学—兽医学]