Effects of UV-B on certain metabolic processes of the green alga Chlorella vulgaris

V. Prasad, A. Kumar, H. D. Kumar

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7 Citations (Scopus)


Exposure of Chlorella vulgaris to UV-B radiation inhibited the survival, growth, and contents of proteins, carbohydrates and pigments in C. vulgaris. Protein was more sensitive to irradiation than carbohydrate. The sensitivity of photosynthetic pigments to UV-B was in the order of: Chl b > Chl a > carotenoids. UV-B also inhibited ammonium uptake and glutamine synthetase activity. The degree of inhibition was enhanced in the dark incubated cells after UV-B treatment. Brief exposure to UV-B stimulated nitrate uptake. Instantaneous UV-B slowly enhanced the NR activity but enhanced it five times in 30h-dark incubated cells followed by 12h fluorescent light after UV-B treatment.

Original languageEnglish
Pages (from-to)129-140
Number of pages12
JournalInternational Journal of Environmental Studies
Issue number1-2
Publication statusPublished - 29-09-1998
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Geography, Planning and Development
  • Ecology
  • Waste Management and Disposal
  • Pollution
  • Computers in Earth Sciences


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