Micromonospora maoerensis sp. nov., isolated from a Chinese pine forest soil

Micromonospora fulva sp. nov., isolated from forest soil

A novel actinobacterium, designated strain UDF-1T, was isolated from forest soil in Chungnam, South Korea, and its taxonomic position was investigated using a polyphasic approach. Strain UDF-1T formed a branched brownish-orange substrate mycelium with spherical or oval spores. No aerial mycelium was formed. Comparative 16S rRNA gene sequence analysis indicated that strain UDF-1T belongs to the genus Micromonospora, showing the highest sequence similarity to Micromonospora palomenae NEAU-CX1T (99.2 % 16S rRNA gene sequence similarity), 'Micromonospora maoerensis' NEAU-MES19 (99.0 %), Micromonospora endolithica DSM 44398T (98.8 %) and Micromonospora matsumotoense IMSNU 22003T (98.8 %). The predominant menaquinones of strain UDF-1T were MK-10 (H4) and MK-10 (H6). The cell wall contained meso-diaminopimelic acid and the whole-cell sugars were arabinose and xylose. The major polar lipids were phosphatidylinositol, diphosphatidylglycerol and phosphatidylethanolamine. The major cellular fatty acids were iso-C16 : 0, anteiso-C15 : 0 and iso-C15 : 0. The genomic DNA G+C content was 73.1 mol%. DNA-DNA relatedness between strain UDF-1T and closely related type strains in the genus Micromonospora was below 30 %. On the basis of the polyphasic analysis conducted in this study, strain UDF-1T represents a novel species of the genus Micromonospora, for which the name Micromonospora fulva sp. nov. is proposed. The type strain is UDF-1T (=KACC 18696T=NBRC 111826T).

Micromonospora profundi sp. nov., isolated from deep marine sediment

A novel actinobacterial strain, designated DS3010T, was isolated from a Black Sea marine sediment and characterized using a polyphasic approach. The strain was shown to have chemotaxonomic, morphological and phylogenetic properties consistent with classification as representing a member of the genus Micromonospora. Comparative 16S rRNA gene sequence studies showed that the strain was most closely related to the type strains of Micromonospora saelicesensis (99.5 %), Micromonospora chokoriensis (99.4 %) and Micromonospora violae (99.3 %). Similarly, a corresponding analysis based on partial gyrB gene sequences showed that it formed a distinct phyletic branch in a subclade that included the type strains of Micromonosporazamorensis, 'Micromonospora zeae', 'Micromonospora jinlongensis', M. saelicesensis and Micromonospora lupini. DS3010T was distinguished from its closest phylogenetic neighbours by low levels of DNA-DNA relatedness and by a combination of chemotaxonomic and phenotypic properties. On the basis of these data, it is proposed that the isolate should be assigned to the genus Micromonospora as Micromonospora profundi sp. nov. with isolate DS3010T (=DSM 45981T=KCTC 29243T) as the type strain.

Micromonospora yasonensis sp. nov., isolated from a Black Sea sediment

A Micromonospora strain, designated DS3186(T), isolated from sediment collected from the Black Sea off the Yason Peninsula, Ordu, Turkey, was examinated using a polyphasic approach. The strain was found to have chemotaxonomic, morphological and phylogenetic properties consistent with its clasification in the genus Micromonospora. A comparative 16S rRNA gene sequence analysis showed that the strain was closely related to the type strains of Micromonospora olivasterospora (99.0 %), Micromonospora equina (98.8 %), Micromonospora rhizosphaerae (98.8 %) and Micromonospora viridifaciens (98.8 %); low levels of DNA-DNA relatednes were found between the isolate and the M. olivasterospora and M. rhizosphaerae strains. Corresponding phylogenetic analysis based on partial gyrB gene sequences showed that strain DS3186(T) formed a subclade with the type strains of Micromonospora eburnea, M. equina, Micromonospora narathiwatensis and M. viridifaciens. Strain DS3186(T) was distinguished from its close phylogenetic neighbours using a combination of chemotaxonomic, morphological and physiological properties. Consequently, it is proposed that strain DS3186(T) represents a novel Micromonospora species for which the name Micromonospora yasonensis sp. nov. is proposed. The type strain is DS3186(T) (=DSM 45980(T) = KCTC 29433(T)).