数字农科院2.0

Rhodococcus Oryzae Sp. Nov., A Novel Actinobacterium Isolated From Rhizosphere Soil Of Rice (Oryza Sativa L.)

文献类型： 外文期刊

作者： Li, CX; Cao, P; Jiang, MQ; Hou, YF; Du, CJ; Xiang, WS; Zhao, JW; Wang, XJ

作者机构：

关键词： 16S Rrna Gene; Polyphasic Analysis; Rhodococcus Oryzae Sp. Nov.; Whole Genome

期刊名称： INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY

ISSN： 1466-5026

年卷期： 2020 年 70 卷 5 期

页码：

收录情况： JCR（2021版）

摘要： A Gram-stain-positive, non-motile, creamy-white actinobacterium, which has an elementary branching rod-coccus life cycle was isolated from the rhizosphere soil of rice (Oryza sativa L.) collected from Northeast Agricultural University in Harbin, Heilongjiang province, north-east PR China, and its taxonomic status was examined by using a polyphasic approach. Results from the 165 rRNA gene sequence study showed that the isolate, designated strain NEAU-CX67(T), belonged to the genus Rhodococcus and formed a cluster with Rhodococcus maanshanensis DSM 44675(T). Rhodococcus kronopolitis NEAU-ML12(T) and Rhodococcus tukisamuensis JCM 11308(T) (98.3, 98.1 and 97.7% gene sequence similarity, respectively). The major fatty acids were C-16:0, 10-methyl C-18:0, C-18:1 omega 9C and C-16:1 omega 7c The polar lipids were diphosphatidylglycerol, phosphatidylethanolamine. phosphatidylinositol and phosphatidylinositol mannoside. The major isoprenoid quinone was MK-8(H-2). Whole-cell hydrolysates contained meso-diaminopimelic acid. Arabinose, galactose and ribose were detected as diagnostic sugars from whole-cell hydrolysates. Mycolic acids were detected. The genomic DNA G+C content of strain NEAU-CX67(T) was 64.6 mol%. Strain NEAU-CX67(T) exhibited low average nucleotide identity and digital DNA-DNA hybridization values with R. maanshanensis DSM 44675(T) (92.1 and 45.4%) and R. tukisamuensis JCM 11308(T) (81.9 and 24.4%). On the basis of results of phylogenetic. genotypic. physiological and chemotaxonomic analysis, strain NEAU-CX67(T) is considered to represent a novel species of the genus Rhodococcus for which the name Rhodococcus oryzae sp. nov. is proposed. The type strain is NEAU-CX67(T) (=DSM 107701(T)=CCTCC AB 2018233(T)).

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