Novosphingobium guangzhouense sp. nov., with the ability to degrade 1-methylphenanthrene
2017
A novel Gram-stain-negative, flagellated, rod-shaped, yellow-pigmented aerobic bacterium, strain SA925T, that is capable of degrading 1-methylphenanthrene was isolated from oil-polluted soil collected from a refinery located in Guangzhou, China. Phylogenetic analysis based on the 16S rRNA gene sequence demonstrated that strain SA925T belongs to the genus
Novosphingobium
and is evolutionarily close to the type strains of
Novosphingobium
gossypii (98.5 % similarity),
Novosphingobium
panipatense (98.2 %),
Novosphingobium
mathurense (98.0 %) and
Novosphingobium
pentaromativorans (96.5 %). The G+C content of the genomic DNA was 60.2 mol%. DNA–DNA hybridization experiments between strain SA925T and the closest strain,
Novosphingobium gossypii
JM-1396T, revealed a low level of relatedness (35.5 %). Strain SA925T grew at 10–35 °C, at pH 6.0–8.0 and in the presence of 0–4 % (w/v) NaCl. The major fatty acids were C18 : 1
ω7c, C16 : 0 and summed feature 3 (C16 : 1
ω7c and/or C16 : 1
ω6c). The polar lipid profiles mainly consisted of diphosphatidylglycerol, phosphatidylglycerol, phosphatidyldimethylethanolamine, phosphatidylethanolamine and sphingoglycolipid (the characteristic polar lipid). The predominant ubiquinone was Q-10. The major polyamine was spermidine. Based on the phylogenetic, phenotypic and physiological characteristics, strain SA925T was considered to represent a novel species of the genus
Novosphingobium
, for which the name Novosphingobium guangzhouense sp. nov. is proposed. The type strain is SA925T (=DSM 32207T=GDMCC 1.1110T).
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