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Janibacter melonis sp. nov., isolated from abnormally spoiled oriental melon in Korea

¹ Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Taejon, Korea
² School of Biological Sciences, Seoul National University, Kwanak-gu, Seoul 151-742, Korea
³ The Center for Traditional Microorganism Resources, Keimyung University, Shindang-Dong, Dalseo-gu, Daegu, Korea
⁴ Department of Crop Science, Chungnam National University, Yusong, Taejon, Korea

Correspondence
Jung-Hoon Yoon
jhyoon{at}kribb.re.kr

Two Gram-positive bacterial strains, CM2104^T and CM2110, isolated from the inner part of abnormally spoiled oriental melon (Cucumis melo) in Korea, were subjected to a polyphasic taxonomic study. The cell-wall peptidoglycan of strains CM2104^T and CM2110 contained meso-diaminopimelic acid as the diagnostic diamino acid. The predominant menaquinone was MK-8(H₄). The major fatty acids detected in the two strains were iso-C_{16 : 0}, C_{17 : 1}8c and C_{18 : 1}9c or C_{17 : 0}. The DNA G+C content of the two strains was 73 mol%. Phylogenetic analysis based on 16S rRNA gene sequences showed that the strains formed a coherent cluster with a clade comprising two Janibacter species, Janibacter limosus and Janibacter terrae. Strains CM2104^T and CM2110 exhibited a 16S rRNA gene sequence similarity value of 99·7 % and a mean DNA–DNA relatedness level of 89 %. Strains CM2104^T and CM2110 showed 16S rRNA gene sequence similarity levels of 97·8–98·4 % to the type strains of J. limosus and J. terrae. DNA–DNA relatedness between strains CM2104^T and CM2110 and the type strains of these two Janibacter species was 7–11 %. On the basis of the phenotypic and phylogenetic data and genomic distinctiveness, strains CM2104^T and CM2110 should be placed within the genus Janibacter as members of a novel species, for which the name Janibacter melonis sp. nov. is proposed. The type strain is CM2104^T (=KCTC 9987^T=DSM 16063^T=JCM 12321^T).

Published online ahead of print on 17 September 2004 as DOI 10.1099/ijs.0.63167-0.

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains CM2104^T and CM2110 are AY522568 and AY522569, respectively.

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