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Massilia niabensis sp. nov. and Massilia niastensis sp. nov., isolated from air samples

¹ Applied Microbiology Division, National Institute of Agricultural Science and Technology, Rural Development Administration (RDA), Suwon 441-707, Republic of Korea
² Korean Agricultural Culture Collection (KACC), National Institute of Agricultural Biotechnology, RDA, Suwon 441-707, Republic of Korea
³ DSMZ – Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Inhoffenstraße 7b, D-38124 Braunschweig, Germany

Correspondence
Soon-Wo Kwon
swkwon{at}rda.go.kr

Two bacterial isolates, designated strains 5420S-26^T and 5516S-1^T, were recovered from air samples collected in Suwon, Korea. Cells of both strains were aerobic, Gram-negative, motile rods. Phylogenetically, these strains were positioned within the radius of the genus Massilia. 16S rRNA gene sequence analysis showed that the strains shared 97.3 % sequence similarity and had sequence similarities of 94.9–98.1 % with respect to type strains of species belonging to the genus Massilia. In DNA–DNA hybridization tests, the two strains showed <39 % relatedness with respect to strains of closely related species of the genus Massilia and 27 % relatedness to each other. Both strains contained Q-8 as the predominant isoprenoid quinone and possessed summed feature 3 (comprising C_{16 : 1}7c and/or iso-C_{15 : 0} 2-OH) as the major fatty acid. Strain 5516S-1^T was found to contain the fatty acid C_{20 : 0} (in small amounts), a feature that served to distinguish it from both 5420S-26^T and recognized members of the genus Massilia. The DNA G+C contents of 5420S-26^T and 5516S-1^T were 67.8 and 66.6 mol%, respectively. Phylogenetic, phenotypic and chemotaxonomic data accumulated in this study revealed that 5420S-26^T and 5516S-1^T represent novel species of the genus Massilia, for which the names Massilia niabensis sp. nov. (type strain 5420S-26^T =KACC 12632^T =DSM 21312^T) and Massilia niastensis sp. nov. (type strain 5516S-1^T =KACC 12599^T =DSM 21313^T) are proposed, respectively.