Isolation and characterization of novel hydrocarbon-degrading euryhaline consortia from crude oil and mangrove sediments

Two novel and versatile bacterial consortia were developed for the biodegradation of hydrocarbons. They were isolated from crude oil from the Cormorant Field in the North Sea (MPD-7) and from sediment associated with mangrove roots (MPD-M). The bacterial consortia were able to degrade both aliphatic...

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Bibliographic Details
Published in:Marine biotechnology (New York, N.Y.) N.Y.), 2000-11, Vol.2 (6), p.522-532
Main Authors: Piedad Díaz, M, Grigson, S J, Peppiatt, C J, Burgess, J G
Format: Article
Language:English
Subjects:
Aliphatic compounds
Aromatic compounds
Aromatic hydrocarbons
Bacillus
Bacteria
bacterial consortia
Biodegradation
Brackish
Consortia
Crude oil
Degradation
Erwinia
Euryhalinity
Hydrocarbon-degrading bacteria
Hydrocarbons
Isolation
Mangroves
Marine
Marinobacter
Microbiological strains
Oil
Pristane
Ratios
Salinity
Salinity effects
Seabirds
Seawater
Sediment
Sediments
Sodium chloride
Strain
Wastes
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Summary:Two novel and versatile bacterial consortia were developed for the biodegradation of hydrocarbons. They were isolated from crude oil from the Cormorant Field in the North Sea (MPD-7) and from sediment associated with mangrove roots (MPD-M). The bacterial consortia were able to degrade both aliphatic and aromatic hydrocarbons in crude oils very effectively in seawater (35 g/L NaCl) and synthetic media containing 0 to 100 g/L NaCl (1.7 M). Salinities over twice that of normal seawater decreased the biodegradation rates. However, even at the highest salinity biodegradation was significant. Ratios of nC17 to pristane and nC18 to phytane were significantly lowered across the range of salinity. The lowest values were at 0 and 20 g/L (0.34 M). Phytane was degraded in preference to pristane. The degradation of these compounds was constant over the salinity range, with evidence of a slight increase for consortium MPD-M with increasing salinity. In general, the consortium isolated from mangrove root sediments was more efficient in metabolizing North Sea crude oil than the consortium isolated from Cormorant crude oil. The 5 strains that comprise MPD-M have been tentatively identified as species of the genera Marinobacter, Bacillus, and Erwinia. This is the first report of hydrocarbon-degrading consortia isolated from crude oil and mangrove sediments that are capable of treating oily wastes over such a wide range of salinity.
ISSN:1436-2228
1436-2236
DOI:10.1007/s101260000037