A facultatively alkaliphilic actinomycete strain, designated EGI 80088T, was isolated from a saline-alkali soil sample from Xinjiang province, north-west China, and subjected to a polyphasic taxonomic characterization. Strain EGI 80088T formed fragmented aerial hyphae and short spore chains, and rod-like spores aggregated at maturity. Whole-cell hydrolysates of the isolate contained ll-diaminopimelic acid as the diagnostic diamino acid, and glucosamine, mannose, galactose, glucose and rhamnose as the marker sugars. The major fatty acids identified (>5 %) were anteiso-C15 : 0, iso-C15 : 0, summed feature 4 (iso-C17 : 1I/anteiso-C17 : 1B), iso-C16 : 0 and anteiso-C17 : 0. The predominant menaquinone was MK-9(H4). The G+C content of the genomic DNA of strain EGI 80088T was 70.6 mol%. EGI 80088T showed the highest 16S rRNA gene sequence similarity to its closest phylogenetic neighbour Haloactinopolyspora alba YIM 93246T (98.5 %). The DNA–DNA relatedness value of the strain EGI 80088T and H. alba YIM 93246T was 59.3±5.2 %. On the basis of morphological, chemotaxonomic and phylogenetic characteristics and DNA–DNA hybridization data, strain EGI 80088T represents a novel species of the genus Haloactinopolyspora , for which the name Haloactinopolyspora alkaliphila sp. nov. (type strain EGI 80088T = BCRC 16946T = JCM 19128T) is proposed. The description of the genus Haloactinopolyspora has also been emended.
The taxonomic status of a carbendazim-degrading strain, mbc-2T, isolated from soil under the long-term application of carbendazim in China was determined by means of a polyphasic study. The cells were Gram-stain-positive, motile and rod-shaped. Strain mbc-2T grew optimally at pH 7.0, 30–35 °C and in the presence of 1 % (w/v) NaCl. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain mbc-2T fell within the genus Nocardioides , forming a coherent cluster with the type strain of Nocardioides hankookensis , with which it exhibited 16S rRNA gene sequence similarity values of 97.9 %. The chemotaxonomic properties of strain mbc-2T were consistent with those of the genus Nocardioides : the cell-wall peptidoglycan type was based on ll-2,6-diaminopimelic acid, the predominant menaquinone was MK-8 (H4) and the major fatty acid was iso-C16 : 0. The major polar lipids were phosphatidylglycerol, phosphatidylethanolamine, diphosphatidylglycerol, unknown phospholipids and an unknown aminolipid. The DNA G+C content was 72 mol%. Strain mbc-2T exhibited DNA–DNA relatedness values of 12.5±1.5 %, 23.7±2.7 % and 26.3±3.2 % with respect to Nocardioides hankookensis DS-30T, Nocardioides aquiterrae GW-9T and Nocardioides pyridinolyticus OS4T. On the basis of the data obtained, strain mbc-2T represents a novel species of the genus Nocardioides , for which the name Nocardioides soli sp. nov. is proposed. The type strain is mbc-2T ( = KACC 17152T = CCTCC AB 2012934T).
A novel high G+C actinobacterium, designated strain OS1-21T, was isolated from the rhizosphere soil of a cactus (Opuntia fiscus-indica var. sanboten) and the taxonomic status was investigated using a polyphasic approach. Cells of strain OS1-21T were aerobic, Gram-stain-positive, non-endospore-forming, non-motile rods; colonies of the cells were circular, translucent, smooth and moderate yellow in colour. ll-Diaminopimelic acid was the diagnostic diamino acid in cell-wall peptidoglycan. The predominant menaquinone was MK-8(H4). The major fatty acids were iso-C16 : 0, iso-C16 : 0 2-OH, 10-methyl C17 : 0, 10-methyl C18 : 0 and C17 : 1 cis9. The polar lipids contained diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol and two unknown phospholipids. The DNA G+C content was 73.7 mol%. Based on 16S rRNA gene sequence analysis, the closest phylogenetic neighbours were Nocardioides panacihumi Gsoil 616T (98.7 % sequence similarity) and Nocardioides terrae VA15T (97.8 %), followed by Nocardioides marinus CL-DD14T (97.1 %). DNA–DNA relatedness values of strain OS1-21T with the type strains of the closest phylogenetic neighbours were low (<16.0 %). Combined data of polyphasic taxonomic analyses revealed that the organism could be assigned to a novel species of the genus Nocardioides , for which the name Nocardioides opuntiae sp. nov. is proposed. The type strain is OS1-21T ( = KCTC 19804T = NBRC 107915T).
Strain VN07A0015T was isolated from soil collected on Cat Ba Island, Vietnam. The taxonomic position of strain VN07A0015T was near Streptomyces aomiensis M24DS4T (98.5 % 16S rRNA gene sequence similarity) and Streptomyces scabrisporus NBRC 100760T (95.6 %), and it clustered within them; however, this cluster was distant from the type strains of other species of the genus Streptomyces . The aerial mycelia of strain VN07A0015T were greyish and formed imperfect spiral spore chains (retinaculiaperti type) with smooth-surfaced spores. The morphological features of strain VN07A0015T were different from those of the type strains of S. aomiensis and S. scabrisporus . The chemotaxonomic characteristics of strain VN07A0015T were typical for all members of the genus Streptomyces , which possessed ll-type diaminopimelic acid, menaquinone MK-9(H6, H8) and the major fatty acids iso-C16 : 0 and iso-C15 : 0. DNA–DNA relatedness between strain VN07A0015T and S. aomiensis NBRC 106164T was less than 30 %. In addition, some physiological and biochemical traits differed from those of S. aomiensis . Therefore, we propose that strain VN07A0015T be classified in the genus Streptomyces as a representative of Streptomyces catbensis sp. nov. (type strain VN07A0015T = VTCC-A-1889T = NBRC 107860T).