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Emendation of the Genus Planococcus and Transfer of Flavobacterium okeanokoites Zobell and Upham 1944 to the Genus Planococcus as Planococcus okeanokoites comb. nov.

YASUYOSHI NAKAGAWA^*, TAKESHI SAKANE and AKIRA YOKOTA

Institute for Fermentation, Osaka, Yodogawa-ku, Osaka 532, Japan

^* Corresponding author. Mailing address: Institute for Fermentation Osaka, 17-85, Juso-honmachi 2-chome, Yodogawa-ku, Osaka 532, Japan. Phone: 81 6 300 6555. Fax: 81 6 300 6814.

ABSTRACT

The taxonomic position of Flavobacterium okeanokoites IFO 12536^T (T = type strain) was determined by 16S rRNA gene sequencing and chemotaxonomic methods. Phylogenetic evidence derived from a 16S rRNA sequence analysis indicated that F. okeanokoites, which forms rod-shaped cells, belongs to the genus Planococcus, which forms spherical cells. A phylogenetically close relationship was supported by chemotaxonomic characteristics, such as the presence of menaquinone 7 and menaquinone 8 as major isoprenoid quinones, the presence of phosphatidylglycerol, bisphosphatydylglycerol, and phosphatidylethanolamine as cellular polar lipids, and the G+C content of the DNA (46.3 mol%). These data suggest that whether a cell is a rod or a coccus is not a generic criterion. Accordingly, we propose that F. okeanokoites should be transferred to the genus Planococcus and that the description of the genus Planococcus should be emended.

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