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Microbispora tritici sp. nov., a novel actinomycete isolated from a root of wheat (Triticum aestivum L.)

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A novel actinomycete, designated strain NEAU-HRGS1-13T, was isolated from a root of wheat (Triticum aestivum L.) and characterised using a polyphasic approach. Morphological and chemotaxonomic characteristics were consistent with those… Click to show full abstract

A novel actinomycete, designated strain NEAU-HRGS1-13T, was isolated from a root of wheat (Triticum aestivum L.) and characterised using a polyphasic approach. Morphological and chemotaxonomic characteristics were consistent with those of members of the genus Microbispora. The major menaquinones were identified as MK-9(H2) and MK-9(H4) and the whole cell hydrolysates found to contain meso-diaminopimelic acid and madurose. The phospholipid profile was found to consist of diphosphatidylglycerol, a ninhydrin-positive glycophospholipid, phosphatidylinositol mannosides, phosphatidylmonomethylethanolamine, an unidentified glycolipid and an unidentified lipid. The major fatty acids were identified as iso-C16:0, C16:0, 10-methyl C17:0, C18:0 and C17:0. The 16S rRNA gene sequence analysis showed that the isolate is closely related to Microbispora triticiradicis NEAU-HRDPA2-9T (99.4%), Microbispora bryophytorum NEAU-TX2-2T (99.0%), Microbispora camponoti 2C-HV3T (98.8%), Microbispora hainanensis DSM 45428T (98.8%), Microbispora amethystogenes JCM 3021T (98.6%), Microbispora siamensis NBRC 104113T (98.5%), Microbispora corallina JCM 10267T (98.3%) and Microbispora rosea subsp. rosea JCM 3006T (98.2%). However, DNA–DNA relatedness and cultural, physiological and biochemical data showed that strain NEAU-HRGS1-13T can be distinguished from its close relatives. Therefore, it is concluded that strain NEAU-HRGS1-13T represents a novel species of the genus Microbispora, for which the name Microbispora tritici sp. nov. is proposed. The type stain is NEAU-HRGS1-13T (= CGMCC 4.7402T = DSM 104650T).

Keywords: novel actinomycete; isolated root; wheat triticum; hrgs1 13t; root wheat; neau hrgs1

Journal Title: Antonie van Leeuwenhoek
Year Published: 2019

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