National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Physiological and biochemical variation have been investigated under UV-B stress on cyanobacterium Spirulina platensis. Morphological examinations showed significant change in terms of granulation, pigmentation, both apical and terminal end of filaments, showing altered emission intensity of pigment and changes in morphological structure of sheath in UV B treated as compared to untreated counterpart could observed respectively by bright field, fluorescent and scanning electron microscopy. UV B radiation decreased the, dry weight, Chl a, protein, but carbohydrate content is recorded to increase. UV-B treatment inhibited the both NR and NiR activity by more than 50% as compared to control. Fluorescence spectroscopy of the Chl a demonstrates that exposure of UV-B radiation significantly altered the fluorescence emission spectral profile up to 33% as compared to control. The results showed that owing to adaptation morphological and biochemical changes occur in the cyanobacterium S. Platensis subjected under UV-B treated conditions.
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