Cohnella chilisis sp.nov., a novel nitrogen-fixing species isolated from chili rhizosphere soil

来源 :第十二届全国土壤微生物学术研讨会暨第五届全国微生物肥料生产技术研讨会 | 被引量 : 0次 | 上传用户:qtedu
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  A novel bacterial strain designated YN-59T was isolated from chili rhizosphere soil in China.The isolate was aerobic, Gram-positive, rod-shaped and formed ellipsoidal or oval spores positioned centrally in swollen sporangia.On the basis of 16S rRNA gene sequence analysis, the isolated strain YN-59 was related to members of genus Cohnella.High levels of 16S rRNA gene sequence similarity were found between strain YN-59 and Cohnella plantaginis DSM 25424T (98.5%) and Cohnella ginsengisoli DSM18997T (97.3%), the 16S rRNA gene sequence similarities between strain YN-59 and the other strains recognized members of the genus Cohnella were below 97%.The DNA-DNA hybridization values of strain YN-59 with Cohnella plantaginis DSM 25424T and Cohnella ginsengisoli DSM18997T were 44.2±8.4 % and 28.8±5.8 %, respectively.The DNA G+C content of strain YN-59r was 59.32mo1%.The major isoprenoid quinone was MK-7 and the predominant fatty acids were anteiso-C15∶0 (45.32%), iso-C16∶0 (19.19%), iso-C15∶0 (9.65%) and C16∶o (8.91%).The polar lipids of strain YN-59T consist of diphosphatidylglycerol, phosphatidylglycerol, lyso-phosphatidylglycerol, phosphatidylinositol, glycolipid, unknown phospholipid, phosphatidylcholine, aminolipid and phosphatidylinositol mannosides.Diagnostic diamino acid in the cell wall was meso-Diaminopimelic.On the basis of its phenotypic and genotypic characteristics and levels of DNA-DNA hybridization, strain YN-59T was considered to represent a novel species of the genus Cohnella, for which the name Cohnella chilisis sp.nov.(Type strain YN-59T =CGMCC 1.12046T=JCM 19168T) is proposed.
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