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A phycoerythrin‐lacking mutant induced by DCMU in photoheterotrophically grown Nostoc linckia
Author(s) -
Bastia A. K.,
Adhikary S. P.
Publication year - 1995
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.3620350202
Subject(s) - dcmu , phycocyanin , phycoerythrin , pigment , mutant , photosynthesis , strain (injury) , chlorophyll , photosynthetic pigment , nostoc , cyanobacteria , biology , chemistry , biochemistry , botany , photosystem ii , microbiology and biotechnology , bacteria , flow cytometry , genetics , organic chemistry , anatomy , gene
A blue‐green strain showing loss of phycoeryhtrin pigment was obtained from the 15 mM fructose and 10 −5 M DCMU [3‐(3,4‐dichlorophenyl),1,1‐dimethyl urea] supplemented photoheterotrophic culture of the blackish‐brown rice‐field cyanobacterium Nostoc linckia. Absence of phycoerythrin in the mutant strain was ascertained from the whole cell absorption spectra and spectra of water soluble pigments. Quantitative estimation of photosynthetic pigments of the parent and mutant strain showed that increase in the chlorophyll and phycocyanin content took place in the mutant with a total loss of phycoerythrin. Subculturing under low and high light intensities brought no change in the mutant. The mutant strain grew well, synthesized high amounts of chlorophyll and phycocyanin and possessed higher nitrogen‐fixing capacity in comparison to the parent material.