NDLI: Enhanced haloarchaeal oil removal in hypersaline environments via organic nitrogen fertilization and illumination

Content Provider	Springer Nature Link
Author	Al Mailem, D. M. Eliyas, M. Radwan, S. S.
Copyright Year	2012
Abstract	Hypersaline soil and pond water samples were mixed with 3 % crude oil, some samples were autoclaved to serve as sterile controls; experimental samples were not sterilized. After 6-week incubation at 40 °C under light/dark cycles, the soil microflora consumed 66 %, and after 4 weeks the pond water microflora consumed 63 % of the crude oil. Soil samples treated with 3 % casaminoacids lost 89 % of their oil after 6 weeks and water samples lost 86 % after 4 weeks. Samples treated with casaminoacids and antibiotics that selectively inhibited bacteria, lost even more oil, up to 94 %. Soil–water mixtures incubated under continuous illumination lost double as much more oil than samples incubated in the dark. The soil–water mixture at time zero contained 1.3 × 104 CFU g−1 of hydrocarbon-utilizing microorganisms which were affiliated to Halomonas aquamarina, Exiguobacterium aurantiacum, Haloferax sp., Salinococcus sp., Marinococcus sp. and Halomonas sp. After 6-week incubation with oil, these numbers were 8.7 × 107 CFU g−1 and the Haloferax sp. proportion in the total microflora increased from 20 to 93 %. Experiments using the individual cultures and three other haloarchaea isolated earlier from the same site confirmed that casaminoacids and light enhanced their oil consumption potential in batch cultures.
Starting Page	751
Ending Page	758
Page Count	8
File Format	PDF
ISSN	14310651
Journal	Extremophiles
Volume Number	16
Issue Number	5
e-ISSN	14334909
Language	English
Publisher	Springer Japan
Publisher Date	2012-08-07
Publisher Place	Japan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bioremediation Crude oil Haloarchaea Hypersaline environments Light Nitrogen fertilization Biotechnology Ecology Microbiology
Content Type	Text
Resource Type	Article
Subject	Medicine Molecular Medicine Microbiology

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