Abstract
A novel endophytic filamentous bacterium strain A-T 7972 (T), was isolated from wild orchid Grosourdya appendiculata (Blume) Rchb. f. collected in Thailand. The bacterium developed single non-motile spores with warty surface on substrate mycelia. The taxonomic position was described using a polyphasic approach. The 16S rRNA gene sequence and phylogenetic analysis indicated that strain A-T 7972 (T) belonged to the genus Verrucosispora and shared the highest sequence similarity with V. lutea YIM 013 (T) (98.71 %) and V. gifhornensis DSM 44337(T) (98.53 %). The values of DNA-DNA relatedness that distinguished this novel strain from its closest species were below 70 %. The cell-wall peptidoglycan contained meso-diaminopimelic acid. The whole-cell sugars were mannose, ribose, glucose and xylose. The predominant menaquinone was MK-9(H4). The predominant fatty acids were branched fatty acids iso-C-15 : 0 and iso-C-16 : 0. The diagnostic phospholipids profile consisted of phosphatidylethanolamine, diphosphatidylglycerol, phosphatidylinositol and phosphatidylinositol mannosides. The G+ C content of the genomic DNA was 70.5 mol%. Based on its phenotypic, chemotaxonomic and genotypic characteristics, the new isolate A-T 7972 (T) (= BCC 50981 (T) = TBRC 6031 (T) = NBRC 112512 T) is proposed to be the type strain of novel species, Verrucosispora endophytica sp. nov.
