Sinha, R. P. ; Kumar, Lebert M. ; Kumar, A. ; Kumar, H. D. (1995) Disintegration of phycobilisomes in a rice field cyanobacterium Nostoc sp. following UV irradiation Biochemistry & Molecular Biology International, 37 (4). pp. 697-706. ISSN 1039-9712
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Abstract
The effects of ultraviolet-B (UV-B, 280-315 nm) irradiation on survival, growth and phycobilisome assembly have been studied in the N2-fixing cyanobacterium Nostoc sp. Survival and growth were virtually arrested after 120 min of UV irradiation. The phycobiliprotein fractions showed a decrease in absorption and fluorescence as well as a shift towards shorter wavelengths indicating the impairment of energy transfer from phycobiliproteins to the photosynthetic reaction centers. This was further supported by SDS-PAGE analysis of the fractions which revealed a loss in high molecular mass rod-core and core-membrane linker polypeptides. Also the low molecular mass phycobilin (alpha beta) monomers decreased, showing that the supra-molecular organization of the phycobilisomes disintegrated during UV irradiation.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to International Union of Biochemistry and Molecular Biology. |
| ID Code: | 90450 |
| Deposited On: | 10 May 2012 04:02 |
| Last Modified: | 10 May 2012 04:02 |
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