Abstract:
:Halophenols such as 2,4-dibromophenol (DBP) occur naturally in some marine sediments, as a consequence of various animal and algal activities. In an earlier study, DBP was observed in the burrow microenvironment of the hemichordate Saccoglossus kowalewskii. At the concentrations found in the burrow lining, aerobic respiration appeared to be inhibited significantly relative to anaerobic catabolism. This effect, as well as factors contributing to the degradation of DBP, has been documented further here. Results from the addition of radiolabeled DBP to oxic and anoxic sediment slurries and growth experiments with aerobic and anaerobic enrichments suggested that aerobes did not significantly metabolize DBP and that concentrations likely to be encountered on the inner surfaces of the burrow wall were inhibitory. In contrast, only minimal inhibition of growth occurred for anaerobes exposed to 1 mM DBP; in addition, DBP was substantially degraded in both enrichments and sediments under anaerobic conditions. Dehalogenation with the consequent production of phenol appeared to initiate anaerobic degradation. Sulfate-reducing bacteria did not dehalogenate DBP but appeared to degrade phenol. Decreased bacterial numbers and marked differences in the concentration and chemical speciation of iron in sediments from S. kowalewskii burrows may be attributed to toxic effects of DBP on aerobic bacteria.
journal_name
Appl Environ Microbioljournal_title
Applied and environmental microbiologyauthors
King GMdoi
10.1128/AEM.54.12.3079-3085.1988subject
Has Abstractpub_date
1988-12-01 00:00:00pages
3079-85issue
12eissn
0099-2240issn
1098-5336journal_volume
54pub_type
杂志文章abstract::In this study, food samples were intentionally contaminated with Escherichia coli O157:H7, and then DNA was isolated by using four commercial kits. The isolated DNA samples were compared by using real-time PCR detection of the Shiga toxin genes. The four kits tested worked similarly. ...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/aem.69.3.1844-1846.2003
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doi:10.1128/AEM.56.6.1799-1805.1990
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doi:10.1128/AEM.31.5.784-786.1976
更新日期:1976-05-01 00:00:00
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journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.55.9.2308-2314.1989
更新日期:1989-09-01 00:00:00
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pub_type: 杂志文章
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更新日期:1999-10-01 00:00:00
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doi:10.1128/AEM.40.5.959-963.1980
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journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.54.7.1689-1693.1988
更新日期:1988-07-01 00:00:00
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更新日期:1982-05-01 00:00:00
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journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.59.11.3534-3544.1993
更新日期:1993-11-01 00:00:00
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更新日期:1997-10-01 00:00:00
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journal_title:Applied and environmental microbiology
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doi:10.1128/AEM.50.5.1308-1310.1985
更新日期:1985-11-01 00:00:00
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doi:10.1128/AEM.41.4.912-914.1981
更新日期:1981-04-01 00:00:00
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journal_title:Applied and environmental microbiology
pub_type: 杂志文章
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更新日期:2003-12-01 00:00:00
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pub_type: 杂志文章
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