Applied and Natural Science Foundation
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Journal of Applied and Natural Science
An International Journal | Print ISSN: 0974-9411 | Online ISSN: 2231-5209
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Abstract
Journal of Applied and Natural Science 1(2):280-283(2009)
Biochemical and spectroscopic changes in phycobiliproteins of the protein-rich Cyanobacterium, Spirulina fusiformis induced by UV-B radiation
Vishwanath Prasad
Department f Botany, Thakur Ram Multiple Campus, Birgunj, Tribhuvan University, Nepal
E-mail: mpal_vp@yahoo.com
Abstract : The present study indicated that the Increase in UV-B exposure (312.67 nm, 2.5 Wm-2) to Spirulina fusiformis, a highly protein-rich (60-71%) helically coiled, unicellular, polymorphous cyanobacterium not only bleached phycocyanin (PC) but also decreased its content Absorption spectra of UV-B treated culture showed significant decline in the absorbance at the peak 620nm indicating the presence of PC. The absorbance decreased by increasing UV-B exposure. One hour simultaneous UV-B+PAR (Photosynthetic Active Radiation) exposure protected 33 percent damage of phycocyanin.

Keywords : UV-B, PAR., Phycobiliprotein, Spirulina
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