Lysobacter stagni sp. nov. and Limnohabitans lacus sp. nov., isolated from a pond

Two Gram-negative bacteria, designated as strains LF1^T and HM2-2^T, were isolated from an artificial pond in a honey farm at Hoengseong-gun, Gangwon-do, Republic of Korea. The 16S rRNA sequence analysis results revealed that strain LF1^T belonged to the genus Lysobacter and had the highest sequence similarity to Lysobacter niastensis GH41-7^T (99.0 %), Lysobacter panacisoli CJ29^T (98.9 %), and Lysobacter prati SYSU H10001^T (98.2 %). Its growth occurred at 20-37 °C, at pH 5.0-12.0, and in the presence of 0-2% NaCl. The major fatty acids were iso-C_15 : 0, iso-C_16 : 0, and summed feature 9 (iso-C_17 : 1  ω9c and/or C_16 : 0 10-methyl). The major polar lipids were phosphatidylethanolamine, phosphatidylglycerol, and diphosphatidylglycerol. The DNA G+C content was 67.5 mol%. The average nucleotide identity (ANI) and digital DNA-DNA hybridization (dDDH) values between strain LF1^T and species of the genus Lysobacter were 79.1-84.4% and 22.0-27.5 %, respectively. The 16S rRNA sequence analysis results revealed that strain HM2-2^T belonged to the genus Limnohabitans and was most closely related to Limnohabitans planktonicus II-D5^T (98.9 %), Limnohabitans radicicola JUR4^T (98.4%), and Limnohabitans parvus II-B4^T (98.4 %). Its growth occurred at 10-35 °C, at pH 5.0-11.0, and in the presence of 0-2% NaCl. The major fatty acids were C_16 : 0 and summed feature 3 (C_16 : 1  ω7c/C_16 : 1  ω6c). The major polar lipid was phosphatidylethanolamine. The DNA G+C content was 59.9 mol%. The ANI and dDDH values between strain HM2-2^T and its closely related strains were 75.1-83.0% and 20.4-26.4 %, respectively. Phenotypic, genomic, and phylogenetic data revealed that strains LF1^T and HM2-2^T represent novel species in the genera Lysobacter and Limnohabitans, for which the names Lysobacter stagni sp. nov. and Limnohabitans lacus sp. nov. are proposed, respectively. The type strain of Lys. stagni is LF1^T (=KACC 23251^T=TBRC 17648^T), and that of Lim. lacus is HM2-2^T (=KACC 23250^T=TBRC 17649^T).