Abstract
Pseudomonas 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, bisphosphatidylglycerol and phosphatidylglycerol, as phospholipids. The guanine plus cytosine content of DNA ranged from 61.5 to 65.9%. From these results, it is suggested that P. radiora is more closely related to Rhodopseudomonas palustris than to the other species in the genus Rhodopseudomonas.
