文献类型： 外文期刊
作者： Wang, Hui 1 ; Jin, Haiyang 3 ; Chen, Zhe 1 ; Li, Wenjun 1 ; Ma, Jing 6 ; Hu, Tianlong 1 ; Liu, Qi 7 ; Zhang, Yanhui 1 ; Lin, Xingwu 1 ; Xie, Zubin 1 ;
作者机构： 1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Henan Acad Agr Sci, Wheat Res Inst, Zhengzhou 450002, Peoples R China
4.Sun Yat Sen Univ, State Key Lab Biocontrol, Guangzhou 510275, Peoples R China
5.Sun Yat Sen Univ, Sch Life Sci, Guangdong Prov Key Lab Plant Resources, Guangzhou 510275, Peoples R China
6.Jiangsu Vocat Coll Agr & Forestry, Dept Agron & Hort, Jurong 212400, Peoples R China
7.Nanjing Forestry Univ, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing 210037, Peoples R China
8.Nanjing Normal Univ, Sch Geog, Nanjing 210023, Peoples R China
关键词： Azospirillum; polyphasic taxonomy; fixation; indole-3-acetic acid (IAA); plant growth- promoting bacteria; paddy soil
期刊名称：INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY （ 影响因子：2.8； 五年影响因子：2.6 ）
ISSN： 1466-5026
年卷期： 2024 年 74 卷 1 期
页码：
收录情况： SCI
摘要： A Gram- negative and rod- shaped bacterium, designated C340 - 1T, was isolated and screened from paddy soil in Zhongshan County, Guangxi Province, PR China. This strain grew at 20-42 degrees C (optimum, 37 degrees C), pH 5.0-9.0 (optimum, pH 7.0) and 0-4 % (w/v) NaCl (optimum, 0-1 %) on Reasoner's 2A medium. The strain could fix atmospheric nitrogen and acetylene reduction activity was recorded up to 120.26 nmol ethylene h-1 (mg protein)-1. Q- 10 was the only isoprenoid quinone component; phosphatidylethanolamine, phosphatidylglycerol, phosphatidylcholine, an unidentified aminolipid and an unidentified polar lipid were the major polar lipids. Summed feature 8 (C18:1 w7c and/or C18:1 w6c) and summed feature 3 (C16:1 w7c and/or C16:1 w6c) were the primary cellular fatty acids. The genome of strain C340 - 1T was 6.18 Mb, and the G+C content was 69.0 mol%. Phylogenetic tree analysis based on 16S rRNA gene and 92 core genes showed that strain C340 - 1T was closely related to and clustered with the type strains Azospirillum brasilense JCM 1224T, Azospirillum argentinense Az39T, Azospirillum baldaniorum Sp245T and Azospirillum formosense JCM 17639T. The average nucleotide identity (ANI), average amino acid identity (AAI) and digital DNA-DNA hybridization (dDDH) values between strain C340 - 1T and the closely related type strains mentioned above were significantly lower than the threshold values for species classification (95-96 %, 95-96 % and 70 %, respectively). Based on phylogenetic, genomic, phenotypic, physiological and biochemical data, we have reason to believe that C340 - 1T represents a new species of the genus Azospirillum, for which the name Azospirillum isscasi sp. nov. is proposed. The type strain is C340- 1T(=CCTCC AB 2023105T=KCTC 8126T).
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