ADVANCES IN POLAR SCIENCE ›› 1992, Vol. 4 ›› Issue (2): 36-43.

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PRIMARY PRODUCTIVITY OF ACRYLIC ACID AND DIMETHYL SULFIDE DURING A SUMMER BLOOM OF PHAEOCYSTIS POUCHETII IN ANTARCTIC COASTAL WATER

  

  • Online:1992-06-30 Published:1992-06-30

Abstract:

Samples were collected,over P.Pouchetii bloom period beginning in Novermber 1988,from 15m water column 10km off shore from Davis Station,Vestfold Hill,Antarctica.The concentration of toxin compounds,acrylic acid and dimethylsulfide(DMS) in water were determined by HPLC and GC.The results showed that the concentrations change of acrylic acid was 0.001~0.510μmol/L and DMS was 0.003~0.588μmol/L during P.Pouchetii bloom.The concentrations of both were increased from later December and the highest peak of concentrations appeared in early January 1989,then gradually decreased to lower level from mid January to February.This variation in concentrations of acrylic acid and DMS corresponded with the observed variation in cells number of the unicelluar algae P.Pouchetii.The correlation coefficient of relative(R) for acrylic acid against P.Pouchetii and DMS against P.Pouchetii were all 0.998.It is undoubted that P.Pouchetii produced acrylic acid and DMS.The major acrylic acid and DMS pathway of P.Pouchetii showed that dimethylsulfonlum propionate (DMSP) is produced from amino acids(such as methinoine) by successive s methylation,de amination and decarboxylation.DMSP is cleavaged to produce acrylic acid and DMS on one to one basis.The highest primary productivity of acrylic acid and DMS were 9.76×10 -8 μmol/cell and 13.09×10 -8 μmol/cell during a summer bloom of P.Pouchetii in Antarctic coastal water.