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Georgenia ruanii sp. nov., a novel actinobacterium isolated from forest soil in Yunnan (China), and emended description of the genus Georgenia

Wen-Jun Li^1,, Ping Xu^1,, Peter Schumann², Yu-Qin Zhang^1,3, Rüdiger Pukall², Li-Hua Xu¹, Erko Stackebrandt² and Cheng-Lin Jiang¹

¹ Laboratory for Conservation and Utilization of Bio-Resources, Yunnan Institute of Microbiology and Yunnan University, Kunming, Yunnan, 650091, People's Republic of China
² DSMZ – Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Inhoffenstrasse 7b, D-38124 Braunschweig, Germany
³ Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China

Correspondence
Wen-Jun Li
wjli{at}ynu.edu.cn

A Gram-positive, motile, short-rod-shaped strain, designated YIM 004^T, was isolated from a forest-soil sample collected from Lijiang, Yunnan Province, China, and was investigated using a polyphasic taxonomic approach. The isolate contained chemotaxonomic markers that corresponded to those of its phylogenetic neighbour, Georgenia muralis, i.e. it possessed peptidoglycan type A4 with lysine as the diagnostic cell-wall diamino acid, the predominant menaquinone was MK-8(H₄) and the major fatty acid was ai-C_{15 : 0}. The G+C content of the genomic DNA was 72.9 mol%. Strain YIM 004^T exhibited a 16S rRNA gene sequence similarity of 97.3 % and a DNA–DNA relatedness value of 18 % with respect to G. muralis DSM 14418^T. On the basis of the phenotypic and genotypic differences between the isolate and G. muralis, strain YIM 004^T represents a novel species of the genus Georgenia, for which the name Georgenia ruanii sp. nov. is proposed. The type strain is YIM 004^T (=CCTCC AB 204065^T=DSM 17458^T=KCTC 19029^T). In addition, an emended description of the genus Georgenia is presented.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain YIM 004^T is DQ203185.

A transmission electron micrograph of cells of strain YIM 004^T is available as a supplementary figure with the online version of this paper.

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