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Carotenoid Distribution in Bleached Substrains of Euglena gracilis
Author(s) -
GOODWIN T. W.,
GROSS J. A.
Publication year - 1958
Publication title -
the journal of protozoology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.067
H-Index - 77
eISSN - 1550-7408
pISSN - 0022-3921
DOI - 10.1111/j.1550-7408.1958.tb02568.x
Subject(s) - euglena gracilis , carotenoid , zeaxanthin , strain (injury) , xanthophyll , pigment , chemistry , botany , lutein , biology , biochemistry , anatomy , organic chemistry , chloroplast , gene
SYNOPSIS. Several substrains of Euglena gracilis var. bacillaris made chlorotic by treatment with pyribenzamine or streptomycin, or by growth at high temperature (35–36°C.), have been examined for their carotenoid content. They differ from the normal green strain both qualitatively and quantitatively. Some strains produce no detectable carotenoids while the carotenoid concentration in the strains producing most is at best only one‐fifth that of the normal strain. In all substrains producing carotenoids, the carotene fraction consists of β‐carotene accompanied by some members of the phytofluene series. In only two of these substrains, HB‐G and PBZ‐G3, are xanthophylls produced in significant amounts. In HB‐G, the main pigment is echinenone, and in PBZ‐G3 it is zeaxanthin. The significance of these findings is briefly discussed.