1887

Abstract

A novel endophytic actinomycete, designated strain KK1-3, which formed single spores and long chains of spores (more than 10 spores) was isolated from surface-sterilized leaf collected from Ubon Ratchathani province, Thailand. The isolate contained -lysine, -diaminopimelic acid and hydroxyl diaminopimelic acid in the cell-wall peptidoglycan. The whole-cell sugars included glucose, mannose, rhamnose, ribose, galactose and xylose. The characteristic phospholipids were phosphatidylethanolamine, phosphatidylmethylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, phosphatidylinositol and phosphoglycolipids. The predominant menaquinones were MK-10(H), MK-10(H) and MK-10(H). The predominant cellular fatty acids were anteiso-C and iso-C. The G+C content of the genomic DNA was 71 mol%. Phylogenetic analysis using 16S rRNA gene sequences revealed that strain KK1-3 should be classified as representing a member of the genus . The similarity values of sequences between this strain and those of the closely related species, K11-0057 (99.0 %), K07-0523 (98.9 %), K09-0627 (98.6 %) and K11-0047 (98.1 %) were observed. The DNA–DNA hybridization result and some physiological and biochemical properties indicated that KK1-3 could be readily distinguished from its closest phylogenetic relatives. On the basis of these phenotypic and genotypic data, this strain represents a novel species, for which the name sp. nov. is proposed. The type strain is strain KK1-3 (=BCC 66360 =NBRC 110005).

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2016-08-01
2020-09-20
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