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Differential response of two species of the cyanobacterium Anabaena to ultraviolet (UV‐C) irradiation
Author(s) -
Patnaik J.,
Swain N.,
Adhikary S. P.
Publication year - 1993
Publication title -
journal of basic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0233-111X
DOI - 10.1002/jobm.3620330611
Subject(s) - anabaena , phycoerythrin , phycocyanin , biology , pigment , botany , ultraviolet light , cyanobacteria , chemistry , photochemistry , bacteria , microbiology and biotechnology , flow cytometry , genetics , organic chemistry
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.