Saccharopolyspora rhizosphaerae sp. nov., an actinomycete isolated from rhizosphere soil in Thailand

International Journal of Systematic and Evolutionary Microbiology
Bungonsiri IntraAtsuko Matsumoto

Abstract

A novel actinomycete, designated as strain H219T, was isolated from rhizosphere soil collected under an Elephant ear plant (Colocasiaesculenta) in Bangkok, Thailand. Strain H219T was characterised using a polyphasic approach. Phylogenetic analysis of the 16S rRNA gene sequences revealed that this isolate was most closely related to Saccharopolyspora tripterygii JCM 32123T (97.6 %), Saccharopolyspora dendranthemae NBRC 108675T (97.5 %) and Saccharopolyspora flava NBRC 16345T (97.5 %). However, DNA-DNA hybridization analyses showed a low relatedness in the range of 39-48 % between the novel isolate and the above closely related strains. The cell-wall peptidoglycan of strain H219T contained meso-diaminopimelic acid. The diagnostic whole-cell sugars consisted of arabinose and galactose. The cellular fatty acid profile mainly comprised iso-C16 : 0, anteiso-C17 : 0, iso-C15 : 0, and 10-methyl C17 : 0. The major menaquinone was MK-9(H4). The detected phospholipids were diphosphatidylglycerol, phosphatidylcholine, phosphatidylethanolamine, phosphatidylglycerol, phosphatidylethanolamine-containing hydroxylated fatty acids and an unknown phospholipid. The DNA G+C content was 70.6 mol%. Strain H219T represented chemotaxonomic and morpholo...Continue Reading

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