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Microbacterium zeae sp nov., an endophytic bacterium isolated from maize stem

文献类型： 外文期刊

作者： Gao, Jun-lian 1 ; Sun, Pengbo 3 ; Wang, Xu-ming 1 ; Lv, Fan-yang 2 ; Sun, Jian-guang 2 ;

作者机构： 1.Beijing Acad Agr & Forestry, Beijing Agrobiotechnol Res Ctr, Beijing Municipal Key Lab Agr Gene Resources & Bi, Beijing 100097, Peoples R China

2.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Key Lab Microbial Resources, Minist Agr, Beijing 100081, Peoples R China

3.Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Beijing 100091, Peoples R China

关键词： Microbacterium;Endophytes;Maize

期刊名称：ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY （ 影响因子：2.271； 五年影响因子：2.707 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： A novel Gram-stain positive, aerobic, non-motile, non-spore-forming and rod-shaped strain designated 1204(T) was isolated from surface-sterilised stem tissue of maize planted in Fangshan District of Beijing, People's Republic of China. A polyphasic taxonomic study was performed on the new isolate. On the basis of 16S rRNA gene sequence similarity studies, this isolate belongs to the genus Microbacterium. High levels of 16S rRNA gene sequence similarity were found between strain 1204(T) and Microbacterium enclense NIO-1002(T) (98.8%) and Microbacterium proteolyticum RZ36(T) (98.4%) respectively. However, the DNA-DNA hybridization values between strain 1204(T) and its closely related species M. proteolyticum DSM 27100(T) and M. enclense DSM 25125(T) were 53.9 +/- 1.6 and 20.9 +/- 1.5% respectively. The DNA G+C content of strain 1204(T) was determined to be 68.0 mol%. The major fatty acids were found to consist of anteiso-C-15:0 (37.6%), iso-C-16:0 (28.6%) and anteiso-C-17:0 (16.6%). The predominant menaquinone was MK-11 and the polar lipid profile consisted of diphosphatidylglycerol, phosphatidylglycerol, an unidentified glycolipid and an unidentified lipid. The results of physiological and biochemical tests and minor differences in the fatty acid profiles allowed a clear phenotypic differentiation of strain 1204(T) from the closely related species in the genus Microbacterium. Thus, it was concluded that strain 1204(T) represents a novel species within the genus Microbacterium, for which the name Microbacterium zeae sp. nov. is proposed, with the type strain 1204(T) (= CGMCC 1.15289 = DSM 100750).

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