1974 Volume 18 Issue 1 Pages 49-56
The effect of light on the pigmentation of various strains of Nocardia, Corynebacterium, Arthrobacter, Brevibacterium, and Flavobacterium was investigated. It was revealed that thirty out of fiftyseven strains of Nocardia, two out of fifteen strains of Corynebacterium, two strains of Arthrobacter, six out of thirteen strains of Brevibacterium and two out of fourteen strains of Flavobacterium were photochromogenic; i. e., these strains produced yellow or orange pigments when grown under illumination but entirely unpigmented in total darkness. From these results, it may be concluded that photochromogenicity is not a particular phenomenon limited to specific species, but a common, widely distributed phenomenon in nonphotosynthetic bacteria.
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