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Differential response of two species of the cyanobacterium Anabaena to ultraviolet (UV-C) irradiation

✍ Scribed by J. Patnaik; N. Swain; Dr. S. P. Adhikary

Publisher
John Wiley and Sons
Year
1993
Tongue
English
Weight
351 KB
Volume
33
Category
Article
ISSN
0233-111X

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✦ Synopsis

Abstract

Ultraviolet sensitivity of two different species of Anabaena, Anabaena doliolum and Anabaena sp. was studied. These two species differ in their pigment composition; A. doliolum showed predominance of phycocyanin whereas Anabaena sp. showed predominance of phycoerythrin pigments. Survival of the two species were different after exposure to different doses of UV (λ~mot~ 254 nm) irradiation; Anabaena sp. was more resistant to higher UV dose than A. doliolum. In both species the UV induced damage was partially repaired by white fluorescent light. A. doliolum showed a lower rate of photorecovery than Anabaena sp., Higher UV dose (20 min) induced production of a non‐nitrogen fixing strain of A. doliolum and a pigment mutant lacking phycoerythrin of Anabaena sp.

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