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Lysobacter niabensis sp. nov. and Lysobacter niastensis sp. nov., isolated from greenhouse soils in Korea

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), Microbial Genetics Division, National Institute of Agricultural Biotechnology, RDA, Suwon 441-707, Republic of Korea
³ Environment and Ecology Division, National Institute of Agricultural Science and Technology, RDA, Suwon 441-707, Republic of Korea
⁴ Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Mascheroder Weg 1b, D-38124 Braunschweig, Germany

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

Two bacterial strains, designated GH34-4^T and GH41-7^T, were isolated from greenhouse soil cultivated with cucumber. The bacteria were strictly aerobic, Gram-negative, rod-shaped and oxidase- and catalase-positive. 16S rRNA gene sequence analysis indicated that these strains belong to the genus Lysobacter within the Gammaproteobacteria. Strain GH34-4^T showed highest sequence similarity to Lysobacter yangpyeongensis GH19-3^T (97.5 %) and Lysobacter koreensis Dae16^T (96.4 %), and strain GH41-7^T showed highest sequence similarity to Lysobacter antibioticus DSM 2044^T (97.5 %), Lysobacter enzymogenes DSM 2043^T (97.5 %) and Lysobacter gummosus ATCC 29489^T (97.4 %). Levels of DNA–DNA relatedness indicated that strains GH34-4^T and GH41-7^T represented species clearly different from L. yangpyeongensis, L. antibioticus, L. enzymogenes and L. gummosus. The major cellular fatty acids of strains GH34-4^T and GH41-7^T were iso-C_{16 : 0}, iso-C_{15 : 0} and iso-C_{17 : 1}9c, and the major isoprenoid quinone was Q-8. The DNA G+C contents of GH34-4^T and GH41-7^T were 62.5 and 66.6 mol%, respectively. On the basis of the polyphasic taxonomic data presented, it is evident that each of these strains represents a novel species of the genus Lysobacter, for which the names Lysobacter niabensis sp. nov. (type strain GH34-4^T=KACC 11587^T=DSM 18244^T) and Lysobacter niastensis sp. nov. (type strain GH41-7^T=KACC 11588^T=DSM 18481^T) are proposed.

A table giving the fatty acid compositions of strains GH34-4^T and GH41-7^T is available as supplementary material in IJSEM Online.

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