Demethylation and cleavage of dimethylsulfoniopropionate in marine intertidal sediments
FEMS Microbiology Ecology
By: P.T. Visscher, R.P. Kiene, and B.F. Taylor
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Abstract
Demethylation and cleavage of dimethylsulfoniopropionate (DMSP) was measured in three different types of,intertidal marine sediments: a cyanobacterial mat, a diatom-covered tidal flat and a carbonate sediment. Consumption rates of added DMSP were highest in cyanobacterial mat slurries (59 ?? mol DMSP l-1 slurry h-1) and lower in slurries from a diatom mat and a carbonate tidal sediment (24 and 9 ??mol DMSP l-1 h-1, respectively). Dimethyl sulfide (DMS) and 3-mercaptopropionate (MPA) were produced simultaneously during DMSP consumption, indicating that cleavage and demethylation occurred at the same time. Viable counts of DMSP-utilizing bacteria revealed a population of 2 x 107 cells cm-3 sediment (90% of these cleaved DMSP to DMS, 10% demethylated DMSP to MPA) in the cyanobacterial mat, 7 x 105 cells cm-3 in the diatom mat (23% cleavers, 77% demethylators), and 9 x 104 cells cm-3 (20% cleavers and 80% demethylators) in the carbonate sediment. In slurries of the diatom mat, the rate of MPA production from added 3-methiolpropionate (MMPA) was 50% of the rate of MPA formation from DMSP. The presence of a large population of demethylating bacteria and the production of MPA from DMSP suggest that the demethylation pathway, in addition to cleavage, contributes significantly to DMSP consumption in coastal sediments.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Demethylation and cleavage of dimethylsulfoniopropionate in marine intertidal sediments |
| Series title | FEMS Microbiology Ecology |
| DOI | 10.1016/0168-6496(94)90095-7 |
| Volume | 14 |
| Issue | 2 |
| Year Published | 1994 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | FEMS Microbiology Ecology |
| First page | 179 |
| Last page | 189 |
| Google Analytic Metrics | Metrics page |