sp. nov. and sp. nov., isolated from forest soil.

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2019
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Abstract
Two Gram-stain-negative, aerobic, motile, white-pigmented and rod-shaped bacterial strains, 7MH5 and 4 M-K11, were isolated from forest soil of Dinghushan Biosphere Reserve, Guangdong Province, PR China. Strain 7MH5 grew at 4-37 °C (optimum, 28-33 °C), pH 3.5-9.0 (pH 4.0-5.5) and in the presence of 0-3 % (w/v) NaCl (0-1.5 w/v); while strain 4 M-K11 grew at 4-42 °C (20-33 °C), pH 3.5-8.5 (pH 4.5-6.0) and in the presence of 0-2.5 % (w/v) NaCl (0-1.5 w/v). Strains 7MH5 and 4 M-K11 have the highest 16S rRNA gene sequence similarities of 98.6 and 98.7 % to PP52-1, and 98.4 % between themselves. In the 16S rRNA gene sequence phylogram, strains 4 M-K11 and NBRC 106233 formed a clade while 7MH5 were relatively distinct from other species. Based on the UBCG phylogenomic analysis, strains 7MH5 and 4 M-K11 formed a clade with NBRC 105797 and LMG 19450 in the genus of . The DNA G+C contents of strains 7MH5 and 4 M-K11 were 64.2 and 64.3 %, respectively. Digital DNA-DNA hybridization and the average nucleotide identity values of strains 7MH5, 4 M-K11 and closely related strains were in the ranges of 25.2-63.6 % and 81.0-95.5 %, respectively. The two strains had the same major respiratory quinone: ubiquinone-8. Strain 7MH5 had C, Ccyclo, Ccyclo and summed feature 8 (C7/C6) as its major fatty acids, while strain 4 M-K11 had major fatty acids of C, Ccyclo and summed feature 2 (iso-C I/C-3OH). The major polar lipids were phosphatidylethanolamine, phosphatidylglycerol and diphosphatidylglycerol. On the basis of phenotypic and phylogenetic analyses based on both 16S rRNA gene and whole genome sequences, as well as chemotaxonomic data, strains 7MH5 and 4 M-K11 represent two novel species of the genus , for which the names sp. nov. (type strain 7MH5=GDMCC 1.1450=KACC 19962) and sp. nov. (type strain 4 M-K11=GDMCC 1.1284=CGMCC 1.15450=KACC 19961=LMG 29217) are proposed.
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Authors Xiao, Sen-Yang;Gao, Zeng-Hong;Lin, Qin-Hua;Qiu, Li-Hong;
Journal international journal of systematic and evolutionary microbiology
Year 2019
DOI
10.1099/ijsem.0.003681
URL
Keywords Keywords not found

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