Nonomuraea lactucae sp. nov., a novel actinomycete isolated from rhizosphere soil of lettuce (Lactuca sativa)

Nonomuraea aurantiaca sp. nov., a novel cellulase-producing actinobacterium isolated from soil

A novel cellulase-producing actinobacterium, designated strain NEAU-L178T, was isolated from soil sample collected from Qiqihaer, Heilongjiang Province, PR China. A polyphasic study was carried out to determine the taxonomic status of the strain. On the basis of 16S rRNA gene sequence analysis, strain NEAU-L178T should be classified into the genus Nonomuraea and is closely related to Nonomuraea cavernae SYSU K10005T (99.31 % 16S rRNA gene sequence similarity), Nonomuraea glycinis NEAU-BB2C19T (98.75 %), Nonomuraea guangzhouensis NEAU-ZJ3T (98.75 %) and ‘Nonomuraea rhizosphaerae’ NEAU-mq18T (98.34 %). The digital DNA–DNA hybridization values between them are 27.1, 26.1, 42.0 and 30.9 %, and the whole-genome average nucleotide identity values between them are 83.1, 82.3, 90.3 and 85.8 %, respectively. The whole-cell hydrolysates contained glucose, ribose, arabinose and madurose. The menaquinones were identified as MK-9(H0), MK-9(H4) and MK-9(H2). The major fatty acids were C16 : 0, iso-C17 : 0 and C17 : 0 10-methyl. The detected polar lipids were diphosphatidylglycerol, phosphatidylethanolamine, hydroxy-phosphatidylethanolamine, phosphatidylinositol and three unidentified phospholipids. The genomic DNA G+C content was 69.7 mol%. In addition, whole-genome analysis indicated that strain NEAU-L178T had the potential to degrade cellulose. Based on the phenotypic, genotypic, chemotaxonomic and phylogenetic data, strain NEAU-L178T can be differentiated from its close phylogenetic relatives and represents a novel species of the genus Nonomuraea , for which the name Nonomuraea aurantiaca sp. nov. is proposed. The type strain is NEAU-L178T (=JCM 34799T=CGMCC 4.7741T).

Comprehensive genome analysis of a novel actinobacterium with high potential for biotechnological applications, Nonomuraea aridisoli sp. nov., isolated from desert soil

During a study to isolate such actinobacteria with unique metabolic potential, a novel actinobacterium, designated KC333^T, was isolated from a soil sample collected from the Karakum Desert, Turkmenistan. The taxonomic position of the strain was investigated using a polyphasic approach. Phylogenetic analysis of the 16S rRNA gene sequence showed that the strain was most closely related to Nonomuraea terrae CH32^T (99.0% sequence similarity), Nonomuraea maritima FXJ7.203 ^T (98.9%), Nonomuraea candida HMC10^T (98.7%) and Nonomuraea gerenzanensis ATCC 39727 ^T (98.6%), and is therefore considered to represent a member of the genus Nonomuraea. However, the average nucleotide identity and digital DNA-DNA hybridization based on whole-genome sequences between strain KC333^T and close relatives demonstrated that it represents a novel species of the genus Nonomuraea. The major cellular fatty acids of strain KC333^T were iso-C_16: 0, C_17:0 10-methyl and iso-C_16: 0 2OH. Strain KC333^T contained meso-diaminopimelic, mannose, madurose and ribose in the cell-wall peptidoglycan. The predominant menaquinones were MK-9(H₄) and MK-9(H₆). The genome size of strain KC333^T is approximately 9.86 Mb, and the genomic DNA G + C content of the strain is 71.3%. In addition to the polyphasic characterisation, comprehensive genome analysis for gene clusters encoding carbohydrate-active enzymes and bioactive secondary metabolites as well as CRISPR-associated sequences revealed the high biotechnological potential of the strain. Based on evidence collected from the genotypic, phenotypic, and phylogenetic analyses, a novel species, Nonomuraea aridisoli sp. nov. is proposed with KC333^T (= DSM 107062 ^T = JCM 32584 ^T = KCTC 49111 ^T) as the type strain.

Nonomuraea antri sp. nov., an actinomycete isolated from cave soil in Thailand

A novel actinobacterium, designated strain NN258T, was isolated from a cave soil sample collected from a karst cave at Khao No-Khao Kaeo, Nakhon Sawan province, Thailand. The morphological, chemotaxonomic and phylogenetic characteristics were consistent with its classification in the genus Nonomuraea . Strain NN258T showed the highest 16S rRNA gene sequence similarity values to Nonomuraea candida HMC10T, Nonomuraea mesophila 6K102T, Nonomuraea rubra DSM 43768T, Nonomuraea diastatica KC712T and Nonomuraea helvata IFO 14681T. The strain formed an extensively branched substrate and aerial mycelia. The whole-cell hydrolysates contained meso-diaminopimelic acid as the diagnostic diamino acid, with glucose, madurose, mannose and ribose as the whole-cell sugars. The polar lipids were diphosphatidylglycerol, phosphotidylmethylethanolamine, phosphatidylethanolamine, hydroxy-phosphatidylmonomethylethanolamine, hydroxy-phosphatidylethanolamine, phosphatidylinositol, phosphatidylinositol mannoside, two unidentified phospholipids, three unidentified sugar-containing phosphoaminolipids, an unidentified glycolipid and two unidentified lipids. The predominant menaquinone was MK-9(H4), with minor amounts of MK-9(H0), MK-9(H2) and MK-9(H6). Major cellular fatty acids (>10%) were iso-C16 : 0 and 10-methyl-C17 : 0. The G+C content of the genomic DNA was 71.0 mol%. The average nucleotide identity and digital DNA–DNA hybridization values between strain NN258T and the reference strains were 79.9–80.9 % and 26.1–27.0 %, respectively. On the basis of phenotypic, genotypic and phylogenetic data, strain NN258T represents a novel species of the genus Nonomuraea , for which the name Nonomuraea antri sp. nov. is proposed. The type strain is NN258T (=TBRC 11478T=NBRC 114269T).

Nonomuraea basaltis sp. nov., a siderophore-producing actinobacteria isolated from surface soil of basaltic parent material

A Gram-stain-positive, aerobic, spore-forming actinobacterial strain, designated 160415^T, was isolated from a surface soil sample, which was formed on basaltic parent material, collected from Samsun, Turkey. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain 160415^T clustered closely with species of the genus Nonomuraea, and showed the highest sequence similarity to Nonomuraea zeae NEAU-ND5^T, Nonomuraea candida HMC10^T and Nonomuraea turkmeniaca DSM 43926^T with 99.1%, 98.9% and 98.7%, respectively. Chemotaxonomic properties including major menaquinones, diaminopimelic acid, sugar and phospholipid profiles also confirmed the affiliation of the strain to the genus Nonomuraea. The DNA G+C content of strain 160415^T was 69.6 mol%. DNA-DNA hybridization and average nucleotide identity values between the strain and closely related type strains were less than the recommended cut-off values. On the basis of phylogenetic relationships, genotypic and phenotypic characterizations, strain 160415^T represents a novel species of the genus Nonomuraea, for which the name Nonomuraea basaltis sp. nov. is proposed. The type strain is 160415^T (= KCTC 39875^T = DSM 104309^T).

Polyphasic classification of Nonomuraea strains isolated from the Karakum Desert and description of Nonomuraea deserti sp. nov., Nonomuraea diastatica sp. nov., Nonomuraea longispora sp. nov. and Nonomuraea mesophila sp. nov

Five actinobacteria isolates, KC201^T, KC401, KC310^T, KC712^T and 6K102^T, were recovered from the Karakum Desert during an investigation of novel actinobacteria with biotechnological potential. A polyphasic approach confirmed the affiliation of the strains to the genus Nonomuraea. The strains showed chemotaxonomic and morphological properties consistent with their classification in the genus Nonomuraea. Furthermore, these strains clearly distinguished and formed well supperted clades in phylogenetic and phylogenomic trees. Low ANI and dDDH values and distinguishing phenotypic properties between isolates KC201^T, KC310^T, KC712^T and 6K102^T showed that these strains belonged to novel Nonomuraea species, the names proposed for these taxa are Nonomuraea deserti sp. nov., Nonomuraea diastatica sp. nov., Nonomuraea longispora sp. nov. and Nonomuraea mesophila sp. nov., with the type strains KC310^T (=CGMCC 4.7331^T =DSM 102919^T =KCTC 39774^T), KC712^T (=CGMCC 4.7334^T =DSM 102925^T =KCTC 39776), KC201^T (=CGMCC 4.7339^T =DSM 102917^T =KCTC 39781^T) and 6K102^T (=CGMCC 4.7541^T =JCM 32916), respectively.

Streptomyces oryziradicis sp. nov., a novel actinomycete isolated from rhizosphere soil of rice (Oryza sativa L.)

A novel actinobacterium, designated strain NEAU-C40^T, was isolated from the rhizosphere soil of rice (Oryza sativa L.) collected from Northeast Agricultural University in Harbin, Heilongjiang province, north-east PR China, and was characterized using a polyphasic approach. On the basis of results of 16S rRNA gene sequence analysis, strain NEAU-C40^T belongs to the genus Streptomyces, and shares highest sequence similarities with Streptomyces polygonati CGMCC 4.7237^T (97.9%) and Streptomyces abietis DSM 42080^T (97.9%). Morphological and chemotaxonomic characteristics of the strain also supported its assignment to the genus Streptomyces. Cell walls contained ll-diaminopimelic acid and the whole-cell hydrolysates were glucose, rhamnose and ribose. The major menaquinones were identified as MK-9(H₈) and MK-9(H₆). The major fatty acids were iso-C_16:0, anteiso-C_15:0, C_16:0 and anteiso-C_17:0. The polar lipids were diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylinositol mannoside and an unidentified lipid. The genomic DNA G+C content of strain NEAU-C40^T was 71.8 mol%. Moreover, multilocus sequence analysis based on five other housekeeping genes (atp D, gyr B, rpo B, rec A and trp B) and the low level of DNA-DNA relatedness allowed the isolate to be differentiated from its most closely related strains. On the basis of phenotypic, genotypic and phylogenetic data, strain NEAU-C40^T can be characterized to represent a novel species of the genus Streptomyces, for which the name Streptomyces oryziradicis sp. nov. is proposed. The type strain is NEAU-C40^T (=DSM 107943^T=CCTCC AA 2018038^T).