1887

Abstract

A Gram-positive, aerobic actinomycete, designated strain NEAU 119, was isolated from the rhizosphere of a fig tree and was characterized using a polyphasic approach. The isolate formed branching, non-fragmenting vegetative hyphae and produced black pigment on yeast extract/malt extract (ISP medium 2). The G+C content of the DNA was 76.6 mol%. The organism had chemotaxonomic characteristics typical of the genus and was closely related to the type strains of , and , currently the only three recognized species of the genus , sharing 16S rRNA gene similarities of 96.4, 96.6 and 98.1 %, respectively. However, the results of DNA–DNA hybridization studies demonstrated that the novel strain showed only 46.8 % relatedness with the type strain of . In addition, a set of phenotypic characteristics also readily distinguished strain NEAU 119 from the type strains of recognized species of the genus . According to the above data, it is proposed that strain NEAU 119 represents a novel species, sp. nov. The type strain of is NEAU 119 ( = CGMCC 4.5714 = NBRC 106685).

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2011-05-01
2019-10-21
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Scanning electron micrograph of strain NEAU 119 grown on oatmeal agar for 21 days at 28 °C. Bar, 5 µm.

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