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Planococcus columbae sp. nov., isolated from pigeon faeces

Microbial Type Culture Collection and Gene Bank (MTCC), Institute of Microbial Technology, Sector 39A, Chandigarh 160 036, India

Correspondence
T. Chakrabarti
tapan{at}imtech.res.in

An orange-pigmented, Gram-positive bacterial strain, designated PgEx11^T, was isolated from pigeon faeces. Analysis of the 16S rRNA gene sequence of the isolate indicated that it had 94.2–98.2 % sequence identity with respect to those of seven recognized species of the genus Planococcus. The strain PgEx11^T contained anteiso-C_{15 : 0} as a major cellular fatty acid and MK-7 and MK-8 as the major menaquinones. The DNA G+C content of strain PgEx11^T was 50.5 mol%. Furthermore, analysis of the 16S rRNA gene sequence indicated high levels of similarity with Planococcus rifietoensis (98.2 %), Planococcus maitriensis (97.6 %), Planococcus citreus (97.5 %) and Planococcus maritimus (97.1 %). However, the mean value for DNA–DNA relatedness between PgEx11^T and these four closely related species was in the range 45.4–16.8 %, respectively. Moreover, strain PgEx11^T also differs from its close relatives with regard to biochemical and chemotaxonomic characteristics. On the basis of phenotypic, chemotaxonomic and genotypic differences, strain PgEx11^T represents a novel species of the genus Planococcus, for which the name Planococcus columbae sp. nov. is proposed. The type strain is PgEx11^T (=MTCC 7251^T=DSM 17517^T).

Differential phenotypic and chemotaxonomic characteristics for strain PgEx11^T with respect to species of the genera Planococcus and Planomicrobium are shown in a supplementary table available with the online version of this paper.