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Pseudonocardia ailaonensis sp. nov., isolated from soil in China

¹ The Key Laboratory for Microbial Resources of the Ministry of Education, PR China, and Laboratory for Conservation and Utilization of Bio-resources, Yunnan Institute of Microbiology, Yunnan University, Kunming, Yunnan 650091, PR China
² Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, PR China
³ Center of Technology, Hisun Pharmaceutical Co. Ltd, Taizhou 318000, PR China
⁴ Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China

Correspondence
Wen-Jun Li
wjli{at}ynu.edu.cn
or
liact{at}hotmail.com

A Gram-positive, aerobic actinomycete, designated strain YIM 45505^T, was isolated from a soil sample collected from Yunnan province, south-west China. Cells exhibited cream–white aerial mycelium and orange–yellow to yellow–brown substrate mycelium. The substrate mycelium fragmented into rod-shaped elements, and the aerial mycelium formed long chains of spores. 16S rRNA gene sequence analysis revealed that strain YIM 45505^T was related most closely to Pseudonocardia oroxyli DSM 44984^T (98.5 % similarity) and Pseudonocardia halophobica IMSNU 21327^T (97.5 %). The G+C content of the DNA of strain YIM 45505^T was 74.1 mol%. Combined with results of DNA–DNA hybridization and phenotypic tests, these data revealed that strain YIM 45505^T represents a novel species of the genus Pseudonocardia, for which the name Pseudonocardia ailaonensis sp. nov. is proposed. The type strain is YIM 45505^T (=KCTC 19315^T =DSM 44979^T).

A scanning electron micrograph of cells of strain YIM 45505^T, an extended neighbour-joining tree based on 16S rRNA gene sequences and a table giving the fatty acid contents of strain YIM 45505^T and related species are available as supplementary material with the online version of this paper.

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