文献类型： 外文期刊
作者： Gao, Jun-lian 1 ; Sun, Pengbo 2 ; Wang, Xu-ming 1 ; Qiu, Tian-lei 1 ; Lv, Fan-yang 3 ; Yuan, Mei 3 ; Yang, Ming-ming 1 ;
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 Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Beijing 100091, Peoples R China
3.Chinese Acad Agr Sci, Minist Agr, Key Lab Microbial Resource, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China
4.Chinese Acad Agr Sci, Minist Agr, Key Lab Microbial Resource, Inst Agr R
期刊名称：INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY （ 影响因子：2.747； 五年影响因子：2.889 ）
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收录情况： SCI
摘要： A novel Gram-stain-negative, aerobic and rod-shaped bacterial strain, designated 65(T), was isolated from surface-sterilized root tissue of maize, collected from Fangshan District of Beijing, People's Republic of China, and was subjected to a taxonomic study by using a polyphasic approach. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain 65(T) belonged to the genus Dyadobacter and had highest 16S rRNA gene sequence similarity to Dyadobacter jiangsuensis CGMCC 1.12969(T) (99.1 %), Dyadobacter beijingensis CGMCC 1.6375(T) (98.8 %), Dyadobacter fermentans DSM 18053(T) (98.6 %) and Dyadobacter soli KCTC 22481(T) (98.6 %). However, the new isolate exhibited relatively low levels of DNA-DNA relatedness with respect to D. jiangsuensis CGMCC 1.12969(T) (18.2 +/- 1.3 %), D. beijingensis CGMCC 1.6375(T) (14.2 +/- 2.0 %), D. fermentans DSM 18053(T) (14.1 +/- 2.0 %) and D. soli KCTC 22481(T) (13.8 +/- 0.6 %). The predominant respiratory quinone was menaquinone-7 (MK-7) and the major cellular fatty acids were summed feature 3 (C-16: (1)omega 7c and/or iso-C-15 (:) (0) 2-OH), iso-C-15 (:) (0), iso-C-17 (:) (0) 3-OH, C-16 : (1)omega 5c, iso-C-15 : (0) 3-OH, C-16 : (0) 3-OH and C-16 (: 0). The polar lipid profile of strain 65(T) revealed the presence of phosphatidylethanolamine, four aminolipids and two unidentified phospholipids. The DNA G+C content was 46.6 mol%. The results of physiological and biochemical tests and the differences in the fatty acid profiles allowed the clear phenotypic differentiation of strain 65(T) from closely related species of the genus Dyadobacter. Strain 65(T) thus represents a novel species within the genus Dyadobacter, for which the name Dyadobacterendophyticus sp. nov. is proposed. The type strain is 65(T) (=CGMCC 1.15288(T) =DSM 100786(T)).
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