Pseudomonas pseudoflava, a New Species of Hydrogen-Oxidizing Bacteria: Its Differentiation from Pseudomonas flava and Other Yellow-Pigmented, Gram-Negative, Hydrogen-Oxidizing Species

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Abstract
Five new strains of yellow-pigmented, gram-negative, motile, hydrogen-oxidizing bacteria were isolated; each served as a host for simultaneously isolated bacteriophages. These isolates and two additional strains were compared with other gram-negative, hydrogen-oxidizing bacteria with respect to morphology; nutritional and biochemical properties; growth parameters; cytochrome content; pigment production; susceptibility to bacteriophages, bacteriostatic agents, and antibiotics; deoxyribonucleic acid base composition; and deoxyribonucleic acid-deoxyribonucleic acid homology. Six of the strains were characterized by a high degree of interstrain similarity and were found to be related to Pseudomonas flava. However, due to basic differences between these strains and P. flava, the former are regarded as comprising a new species for which, because of its moderate relationship to P. flava, the name Pseudomonas pseudoflava is proposed. The type strain of P. pseudoflava, GA3, has been deposited with the Deutsche Sammlung von Mikroorganismen in Göttingen under the number DSM 1034.