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Dimethylsulfide Release During Macroinvertebrate Grazing And Its Role As An Activated Chemical Defense, Kathryn L. Van Alstyne Dr., Letise T. Houser
Dimethylsulfide Release During Macroinvertebrate Grazing And Its Role As An Activated Chemical Defense, Kathryn L. Van Alstyne Dr., Letise T. Houser
Shannon Point Marine Center Faculty Publications
Almost half the biogenic sulfur emitted globally originates as dimethylsulfide (DMS) in marine algae. Yet, despite its importance to climate and the global sulfur cycle, the reasons why many diverse algal taxa produce DMS remain unclear. DMS is produced when dimethylsulfoniopropionate (DMSP) is cleaved by the enzyme DMSP lyase into DMS and acrylic acid. Because acrylic acid can deter feeding by some herbivores, the production of DMSP has been postulated to be part of an antiherbivore chemical defense system, with DMS being a by-product of the production of the defensive compound acrylic acid. However, we found that DMS plays a …
The Effects Of Salinity On Dimethylsulfoniopropionate Production In The Green Alga Ulva Fenestrata Postels Et Ruprecht (Chlorophyta), Kathryn L. Van Alstyne Dr., Karen N. Pelletreau, Karyna Rosario
The Effects Of Salinity On Dimethylsulfoniopropionate Production In The Green Alga Ulva Fenestrata Postels Et Ruprecht (Chlorophyta), Kathryn L. Van Alstyne Dr., Karen N. Pelletreau, Karyna Rosario
Shannon Point Marine Center Faculty Publications
Dimethylsulfoniopropionate (DMSP) in marine algae has been hypothesized to serve as a compatible solute which functions in osmotic acclimation or cryoprotection. However, many macroalgae that produce large quantities of DMSP live in habitats where they are unlikely to experience large fluctuations in salinities or freezing temperatures.We hypothesized that DMSP has other functions in these algae and that they should not show large changes in DMSP concentrations in response to salinity changes.We tested this hypothesis by placing 1.5 cm2 diameter disks of the chlorophyte Ulva fenestrata in artificial seawater (ASW) at salinities from 10% ASW to 300% ASW. Over the …