RESUMEN
Two strains, designated as SYSU M80004T and SYSU M80005T, were isolated from water sampled in the Pearl River Estuary, Guangzhou, Guangdong, PR China. The strains were Gram-stain-negative and aerobic. Strain SYSU M80004T could grow at pH 6.0-8.0 (optimum, pH 7.0), 22-30 °C (optimum, 28 °C) and in the presence of 0-1â% NaCl (w/v; optimum 0â%). Strain SYSU M80005T could grow at pH 6.0-8.0 (optimum, pH 7.0), 4-37 °C (optimum, 28 °C) and in the presence of 0-1â% NaCl (w/v; optimum 0%). Both strains contained MK-6 as the predominant menaquinone. C16â:â0 and iso-C15â:â0 were identified as the major fatty acids (>10â%) of strain SYSU M80004T while strain SYSU M80005T contained iso-C15â:â0 and iso-C17â:â0 3-OH as major fatty acids. Phosphatidylethanolamine was present as the major polar lipid in both strains. The average nucleotide identity and digital DNA-DNA hybridization values between these two strains and their closest relatives were 73.5-79.3â% and 19.6-23.2â%, respectively. Phylogenetic analysis based on the 16S rRNA gene and genomic sequences indicated they belonged to the genus Flavobacterium. Therefore, on the basis of phenotypic, physiological, chemotaxonomic and genomic evidence, two novel species, Flavobacterium adhaerens sp. nov. (type strain=SYSU M80004T=CDMCC 1.4522T=KCTC 102268T) and Flavobacterium maritimum sp. nov. (type strain=SYSU M80005T=CGMCC 1.4523T= KCTC 102269T) are proposed.
Asunto(s)
Técnicas de Tipificación Bacteriana , Composición de Base , ADN Bacteriano , Estuarios , Ácidos Grasos , Flavobacterium , Hibridación de Ácido Nucleico , Fosfatidiletanolaminas , Filogenia , ARN Ribosómico 16S , Ríos , Análisis de Secuencia de ADN , Vitamina K 2 , Flavobacterium/genética , Flavobacterium/aislamiento & purificación , Flavobacterium/clasificación , China , ARN Ribosómico 16S/genética , Vitamina K 2/análogos & derivados , Vitamina K 2/análisis , Ácidos Grasos/química , ADN Bacteriano/genética , Ríos/microbiología , Microbiología del AguaRESUMEN
One new phenylpropanoid schineolignin D (1), one new sesquiterpene (-)-(7S,10S)-3,11,12,13-tetrahydroxycalamenene (2), one new quinic acid 4-(E)-O-coumaroylquinic acid ethyl ester (3), and seven known compounds 4-10 were separated from the roots of Schisandra chinensis. The chemical structures of all compounds were characterized by NMR spectroscopic experiments. All compounds were assessed for their neuroprotective effects on PC12 cell lines induced by H2 O2 . Compounds 1, 3-4, and 7 showed statistically significant neuroprotective activities with the negative control group at 12.5â µM.