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Int J Syst Evol Microbiol 59 (2009), 559-563; DOI  10.1099/ijs.0.64740-0
© 2009 International Union of Microbiological Societies

Pseudonocardia endophytica sp. nov., isolated from the pharmaceutical plant Lobelia clavata

Hua-Hong Chen1,2, Sheng Qin1, Jie Li1, Yu-Qin Zhang3, Li-Hua Xu1, Cheng-Lin Jiang1, Chang-Jin Kim4 and Wen-Jun Li1

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 Department of Chemistry and Biology, Chuxiong Normal University, Chuxiong, Yunnan 675000, PR China
3 Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, PR China
4 Functional Metabolomics Research Center, KRIBB, Daejeon 305-806, Republic of Korea

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

An endophytic actinomycete strain, designated YIM 56035T, was isolated from the inner tissue of the traditional Chinese medicinal plant Lobelia clavata. The strain stained Gram-positive, was aerobic and exhibited branching, white aerial mycelium and yellowish-brown substrate mycelium. The strain formed spore chains on aerial hyphae. The G+C content of the genomic DNA was 70.3 mol%. On the basis of morphological, physiological, chemotaxonomic and phylogenetic characteristics, strain YIM 56035T was assigned to the genus Pseudonocardia. Analysis of 16S rRNA gene sequences showed 98.5, 97.3, 97.3 and 97.1 % similarity to the closely related type strains Pseudonocardia kongjuensis LM 157T, Pseudonocardia autotrophica IMSNU 20050T, Pseudonocardia ammonioxydans H9T and Pseudonocardia compacta IMSNU 20111T, respectively. The results of DNA–DNA hybridizations and comparison of some phenotypic characteristics revealed that the strain represents a novel species of the genus Pseudonocardia. The name Pseudonocardia endophytica sp. nov. is proposed, with the type strain YIM 56035T (=DSM 44969T =CCTCC AA 206026T =KCTC 19150T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain YIM 56035T is DQ887489.

An electron micrograph showing substrate mycelium of strain YIM 56035T is available as supplementary material with the online version of this paper.




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S. Qin, G.-Z. Zhao, J. Li, W.-Y. Zhu, L.-H. Xu, and W.-J. Li
Actinomadura flavalba sp. nov., an endophytic actinomycete isolated from leaves of Maytenus austroyunnanensis
Int J Syst Evol Microbiol, October 1, 2009; 59(10): 2453 - 2457.
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