1887

Abstract

An actinomycete strain, designated 8-3EHSu, was isolated from surface-sterilised roots of , collected from Petchburi province, Thailand. Taxonomic position of strain 8-3EHSu was studied using a polyphasic approach. Phylogenetic determination based on the 16S rRNA gene sequence similarity showed that strain 8-3EHSu belongs to the genus , with the highest sequence similarity to KLBMP 1262 (96.9 %). The colony of strain 8-3EHSu was yellowish white. Long straight mycelium breaking down into fragments were observed. Growth occurred at temperatures 15–45 °C and at pH 6.0–10.0. The strain contained -diaminopimelic acid, arabinose, galactose and mannose in whole-organism hydrolysates. The predominant menaquinone was MK-9(H). The major fatty acids were C, iso-C and iso-C. Polar lipids consisted of diphosphatidylglycerol, phosphatidylethanolamine, hydroxyphosphatidylethanolamine, two unknown amino lipids and an unknown lipid. The G+C content of genomic DNA was 71.8 mol%. A phylogenetic tree based on 16S rRNA sequences showed that the strain 8-3EHSu formed a distinct evolutionary linage within the genus . Based on analysis results of physiological, biochemical and chemotaxonomic data, strain 8-3EHSu represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is 8-3EHSu (=TBRC 8488=NBRC 113449).

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2019-08-01
2024-03-28
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