Abstract
Strain HX-5-24T was isolated from the sludge collected from the outlet of the biochemical treatment facility of an agricultural chemical plant in Maanshan city, Anhui province, PR China (118° 28' N, 31° 47' E). Cells were observed to be Gram-reaction-negative, rod-shaped, non-motile and aerobic. Strain HX-5-24T shared 99.1% 16S rRNA gene sequence similarity with Lysobacter dokdonensis DS-58T and less than 97% similarities with other type strains. The phylogenetic analysis based on 16S rRNA indicated that strain HX-5-24T belonged to the genus Lysobacter and formed a subclade with L. dokdonensis DS-58T. The average nucleotide identity (ANI) and digital DNA-DNA hybridization (dDDH) values between strain HX-5-24T and L. dokdonensis DS-58T were 87.5% and 35.3%, respectively. The genomic DNA G + C content of the strain was 66.4%. The major fatty acids (> 5%) were iso-C15:0, anteiso-C15:0, iso-C16:0, C16:0 and summed feature 9 (iso-C17:1 ω9c and/or C16:0 10-methyl). The predominant quinone was ubiquinone Q-8. The polar lipid profile consisted of diphosphatidylglycerol (DPG), phosphatidylethanolamine (PE), phosphatidylglycerol (PG) and phospholipids (PL). On the basis of phenotypic and phylogenetic evidences, strain HX-5-24T is considered as a novel species in the genus Lysobacter, for which the name Lysobacter gilvus sp. nov. is proposed. The type strain is HX-5-24T (= KCTC 72470T = CCTCC AB 2019228T).
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