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Pseudonocardia serianimatus sp. nov., a novel actinomycete isolated from the surface-sterilized leaves of Artemisia annua L.

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Abstract

An aerobic, non-motile, catalase-positive, Gram-stain positive actinomycete designated YIM 63233T was isolated from the surface-sterilized leaves of Artemisia annua L. and characterized using a polyphasic taxonomic approach. Optimal growth occurred at 20–28°C, pH 6.0–7.0 and in the presence of 0–3% (w/v) NaCl. 16S rRNA gene sequence-based phylogenetic analysis showed that strain YIM 63233T clustered with species of the genus Pseudonocardia, displaying ≥1.2% sequence divergence with recognized species of this genus (from 98.8 to 94.0%). Relatively low levels of DNA–DNA relatedness were found between strain YIM 63233T and Pseudonocardia petroleophila IMSNU 22072T, which supported the classification of strain YIM 63233T within a novel species of the genus Pseudonocardia. The G + C content of genomic DNA was 72.0 mol%. Strain YIM 63233T possessed chemotaxonomic markers that were consistent with classification in the genus Pseudonocardia, i.e. the predominant fatty acids were iso-C16:0 (32.27%), C16:0 10-methyl (8.73%) and C17:1ω8c (8.30%), whilst the predominant menaquinone was MK-8(H4). The diagnostic diamino acid of the cell-wall peptidoglycan was meso-diaminopimelic acid. The major cell wall sugars were glucose, arabinose, galactose, mannose and rhamnose. The results of physiological and biochemical tests and DNA–DNA hybridization allowed the phenotypic and genotypic differentiation of strain YIM 63233T from its closest phylogenetic neighbours. Therefore, the new isolate YIM 63233T represents a novel species of the genus Pseudonocardia, for which the name Pseudonocardia serianimatus sp. nov. is proposed. The type strain is YIM 63233T (=DSM 45302T = CCTCC AA 208079T).

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Acknowledgments

This research was supported by the National Basic Research Program of China (No. 2010CB833801) and the National Natural Science Foundation of China (No. U0932601).

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Authors and Affiliations

  1. Key Laboratory of Microbial Diversity in Southwest China, Ministry of Education and Laboratory for Conservation and Utilization of Bio-Resources, Yunnan Institute of Microbiology, Yunnan University, Kunming, 650091, People’s Republic of China

    Guo-Zhen Zhao, Wen-Yong Zhu, Li-Hua Xu & Wen-Jun Li

  2. Key Laboratory of Marine Bio-resources Sustainable Utilization CAS, RNAM Center for Marine Microbiology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou, 510301, People’s Republic of China

    Jie Li & Wen-Jun Li

  3. State Key Lab of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing, 100094, People’s Republic of China

    Qiong Xie

Authors
  1. Guo-Zhen Zhao
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  2. Wen-Yong Zhu
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  3. Jie Li
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  4. Qiong Xie
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Correspondence to Qiong Xie or Wen-Jun Li.

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Guo-Zhen Zhao and Wen-Yong Zhu contributed equally to this work.

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Zhao, GZ., Zhu, WY., Li, J. et al. Pseudonocardia serianimatus sp. nov., a novel actinomycete isolated from the surface-sterilized leaves of Artemisia annua L.. Antonie van Leeuwenhoek 100, 521–528 (2011). https://doi.org/10.1007/s10482-011-9607-9

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