Jiangella rhizosphaerae sp. nov., an actinomycete isolated from the rhizosphere soil of wheat (Triticum aestivum L.)

International Journal of Systematic and Evolutionary Microbiology
Chuanyu HanXiangjing Wang

Abstract

A novel actinomycete, designated strain NEAU-YY265T, was isolated from rhizosphere soil of wheat (Triticum aestivum L.) and characterized using a polyphasic approach. Phylogenetic analyses based on 16S rRNA gene sequences showed that strain NEAU-YY265T belonged to the genus Jiangella and exhibited 16S rRNA gene sequence similarities of 99.1 and 99.1 % to Jiangella mangrovi 3SM4-07T and Jiangella alkaliphila D8-87T. The chemotaxonomic properties of strain NEAU-YY265T were consistent with those of the genus Jiangella: the cell-wall peptidoglycan type was based on ll-diaminopimelic acid; the whole-cell hydrolysates contained glucose, ribose and rhamnose; MK-9(H4) and MK-9(H2) were the predominant menaquinones. The novel strain produced branching mycelium which fragmented into short or elongated rods. The major fatty acids (>5 %) were anteiso-C15 : 0, anteiso-C17 : 0, C17 : 1ω8c, iso-C16 : 0, C17 : 0 and iso-C15 : 0. The DNA G+C content was 72.6 mol%. Strain NEAU-YY265T was phenotypically distinct from recognized Jiangella species and shown to belong to a separate genomic species based on DNA-DNA hybridization results. Thus, strain NEAU-YY265T is considered to represent a novel species of the genus Jiangella, for which the name Jia...Continue Reading

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