Ubiquinone, fatty acid, polar lipid and DNA base composition in Pseudomonas radiora.

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Abstract
P. radiora is an aerobic and heterotrophic organism, but forms bacteriochlorophyll under selected conditions reported in a previous paper. In order to elucidate the relation of P. radiora to the anaerobic and photosynthetic genus Rhodopseudomonas, a chemotaxonomic experiment was conducted. P. radiora formed ubiquinone-10 (Q-10), the straight-chain unsaturated acid of C18:1 as the major component and phosphatidylcholine, phosphatidylethanolamine, bis-phosphatidylglycerol and phosphatidylglycerol, as phospholipids. The guanine plus cytosine content of DNA ranged from 61.5-65.9%. P. radiora is apparently more closely related to R. palustris than to the other Rhodopseudomonas spp.