期刊
ARCHIVES OF MICROBIOLOGY
卷 201, 期 8, 页码 1129-1140出版社
SPRINGER
DOI: 10.1007/s00203-019-01687-z
关键词
Acinetobacter pittii strain ABC; Hydrocarbon biodegradation; Biosurfactant; Heavy metals; Crude oil
类别
资金
- DBT [BT/306/NE/TBP/2012]
- Department of Science and Technology [IF10272]
- CSIR/UGC-NET Fellowship from the University Grants Commission [201112-NETJRF-10217-100]
Acinetobacter pittii strain ABC was isolated from oily sludge sediments and characterized with regard to utilization/degradation of hydrocarbons and competitive persistence in hydrocarbon-amended media. The isolate grew in both aliphatic- and aromatic hydrocarbon-amended Bushnell-Haas medium (BHM). When incubated in 1% (v/v) Assam crude oil-amended BHM for 5 and 10 days, this strain was able to degrade 88% and 99.8% of the n-hexane extractable crude oil components, respectively. The isolate showed appreciable emulsification index (E-24 65.26 +/- 1.2%), hydrophobicity (60.88 +/- 3.5%) and produced lipopeptide biosurfactant (0.57 g L-1). The isolate was able to tolerate heavy metal salts at concentrations reported in crude oil-polluted sediments from Assam. A 16S rDNA DGGE-based screening showed the persistence of A. pittii strain ABC in hydrocarbon-amended microcosms co-inoculated with other hydrocarbonoclastic bacterial strains (Pseudomonas aeruginosa AKS1, Bacillus sp. AKS2, Arthrobacter sp. BC1, and Novosphingobium panipatense P5:ABC), each isolated from the same oily sludge sediment. These findings indicate A. pittii strain ABC as a potential agent for the bioremediation of crude oil-polluted environment.
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