Abstract
Two Pseudomonas-like yellow-orange-pigmented non-fluorescent denitrifying strains KMM 235 and KMM 1447T were isolated from marine ascidian specimens and investigated by a polyphasic approach to clarify their taxonomic status. On the basis of 16S rDNA gene sequence data the new isolates clustered with the Pseudomonas stutzeri species group with sequence similarities of >98%. The results of DNA-DNA hybridization and biochemical characterization showed genetic and phenotypic distinction between strains KMM 235 and KMM 1447T and from the other validly described Pseudomonas species. Strain KMM 235 was found to be closely related to the type strain of Pseudomonas stutzeri in their phenotypic and genetic characteristics and represented, probably, a new P. stutzeri genomovar. It is proposed that strain KMM 1447T be classified as a new species of the genus Pseudomonas, Pseudomonas xanthomarina sp. nov., with the type strain KMM 1447T (=JCM 12468T=NRIC 0617T=CCUG 46543T).
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