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Photoreactivation of UV-irradiated blue-green algae and algal virus LPP-1

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Abstract

Ultraviolet (UV) sensitivity and photoreactivation of blue-green algae Cylindrospermum sp., Plectonema boryanum, spores of Fischerella muscicola and algal virus (cyanophage) LPP-1 were studied. The survival value after UV irradiation of filaments of Cylindrospermum sp. and Virus LPP-1 showed exponential trend and these were comparatively sensitive towards UV than F. muscicola and P. boryanum. Photoreactivation of UV-induced damage occurred in black, blue, green, yellow, red and white light in Cylindrospermum sp., however only black, blue and white light were capable of photorepair of UV-induced damage in P. boryanum, spores of F. muscicola and virus LPP-1 in infected host alga. Pre-exposure to yellow and black light did not show photoprotection. The non-heterocystous and nitrogen fixation-less mutants of Cylindrospermum sp. were not induced by UV and their spontaneous mutation frequency was not affected after photoreactivation. The short trichome mutants of P.boryanum were more resistant towards UV.

The occurrence of photoreactivation of UV-induced killing in wide range of light in Cylindrospermum sp. is the first report in organisms.

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  1. Central Rice Research Institute, Cuttack, Orissa, India

    P. K. Singh

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  1. P. K. Singh
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Singh, P.K. Photoreactivation of UV-irradiated blue-green algae and algal virus LPP-1 . Arch. Microbiol. 103, 297–302 (1975). https://doi.org/10.1007/BF00436364

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  • DOI: https://doi.org/10.1007/BF00436364

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