Lee, P. A.. Université du Québec à Rimouski, Peter_Lee@uqar.uquebec.ca
de Mora, S. A.. Université du Québec à Rimouski, Stephen_deMora@uqar.uquebec.ca
Gosselin, M. Université du Québec à Rimouski, Michel_Gosselin@uqar.uquebec.ca
Levasseur, M. Institut Maurice-Lamontagne, LevasseurM@dfo-mpo.gc.ca
Nozais, C. Université du Québec à Rimouski, Christian_Nozais@uqar.uquebec.ca
Bouillon, R. C.. Université du Québec à Rimouski, Rene_Bouillon@uqar.uquebec.ca

 
DIMETHYLSULFOXIDE AND DIMETHYLSULFONIOPROPIONATE CONTENT OF ICE ALGAE IN THE NORTHWATER POLYNYA, BAFFIN BAY
 
Ice algae, collected during the 1998 International North Water Project in Baffin Bay, were analyzed for intracellular dimethylsulfoxide (DMSOp) and dimethylsulfoniopropionate (DMSPp). While the biosynthetic production of DMSP by ice algae is well known, this study represents the first time that DMSO has been measured in this type of planktonic community. Although DMSP is known to be synthesized by micro- and macro-algae for use as a cryoprotectant and osmotic regulator, the biological role of DMSO remains speculative. Based on its physico-chemical properties, DMSO could act as a cryoprotectant and as a specialist osmoregulator in extreme environments. This study examines the concentrations of DMSO and DMSP in ice algae and the relationship between them. Also investigated are correlations between these two compounds and chlorophyll-a. Similarly, comparisons are also made between the concentrations of the same compounds measured in samples taken from the seawater immediately in contact with the sea-ice.
 
Day: Thursday, Feb. 4
Time: Poster
Location: Sweeney Center
 
Code: SS37TH1472S