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Massilia jejuensis sp. nov. and Naxibacter suwonensis sp. nov., isolated from air samples

¹ Korean Agricultural Culture Collection (KACC);
² National Academy of Agricultural Science, Suwon 441-707, Republic of Korea

³ E-mail: swkon{at}rda.go.kr

Two Gram-negative, motile, rod-shaped bacteria (strains 5317J-18T and 5414S-25T) were isolated from air samples collected in the Jeju Island and Suwon region, respectively. Phylogenetically, strain 5317J-18T was grouped into the genus Massilia with the closest relative, Massilia brevitalea byr23-80T (98.8 % sequence similarity) and strain 5414S-25T was affiliated into the genus Naxibacter with the closest relative, Naxibacter haematophilus CCUG 38318T (98.8 % sequence similarity). The mean DNA-DNA relatedness values between 5317J-18T, and Massilia brevitalea DSM 18925T and Massilia aurea DSM 18055T were 43 and 36 %, respectively. The mean DNA-DNA hydridization values between 5414S-25T, and Naxibacter haematophilus KACC 13771T, Massilia brevitalea DSM 18925T, Massilia timonae DSM 16850T, Naxibacter varians KACC 13770T, Massilia aurea DSM 18055T, Massilia lutea DSM 17473T and Massilia albidiflava DSM 17472T ranged between 33 and 42%. Both strains had ubiquinone Q-8 as the predominant isoprenoid quinine, and summed feature 3 (comprising iso-C15:0 2-OH and/or C16:1 7c) and C16:0 as the major fatty acids. Both strains also showed the similar polar lipid profiles with phosphatidylethanolamine phosphatidylglycerol and diphosphatidylglycerol as the major polar lipids. The DNA G+C contents of strains 5317J-18T and 5414S-25T were 66.1 and 67.8 %, respectively. On the basis of their phenotypic, chemotaxonomic and genotypic characteristics, each of two new strains are assigned to novel species of the genera Massilia and Naxibacter, for which the names Massilia jejuensis sp. nov. and Naxibacter suwonensis sp. nov. are proposed. The type strain of Massilia jejuensis is 5317J-18T (=KACC 12634T=DSM 21309T) and the type strain of Naxibacter suwonensis is 5414S-25T (=KACC 12635T=DSM 21311T).