Premium
CHARACTERIZATION OF PIGMENT MUTANTS IN A BLUEGREEN ALGA, ANACYSTIS NIDULANS 1
Author(s) -
Stevens C. L. R.,
Myers Jack
Publication year - 1976
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.1529-8817.1976.tb02834.x
Subject(s) - phycocyanin , biology , mutant , pigment , photosynthetic reaction centre , chlorophyll , chlorophyll a , botany , photosynthesis , biochemistry , cyanobacteria , genetics , bacteria , chemistry , organic chemistry , gene
SUMMARY Characteristics of 2 types of pigment mutants of the bluegreen alga, Anacystis nidulans , are described. “Yellow‐green” mutants (YG) which have normal chlorophyll but only half the phycocyanin of the parent are similar to the parent in number of reaction centers/cell, number of chlorophylls/reaction center, maximum turnover rate of the reaction centers, quantum yields at 620 and 686 nm and specific growth rate; they have a reduced action at 620 nm. “Blue” mutants (BL) with somewhat higher phycocyanin but only one‐third the chlorophyll of the parent are dissimilar to the parent. BL's have fewer reaction centers/cell, a smaller number of chlorophylls/reaction center, a higher maximum turnover rate of reaction centers, and a lower specific growth rate. BL's show ca. half the quantum yield of the parent at 620 nm and at 686 nm show a “red rise” rather than a “red drop.” The consequences attending low chlorphyll in the BL's are more drastic than those attending the low phycocyanin of the YG's.