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Concentrations of dimethylsulfoniopropionate and dimethyl sulfide are strain-specific in symbiotic dinoflagellates (symbiodinium sp., dinophyceae)

Steinke, M and Brading, P and Kerrison, P and Warner, ME and Suggett, DJ (2011) 'Concentrations of dimethylsulfoniopropionate and dimethyl sulfide are strain-specific in symbiotic dinoflagellates (symbiodinium sp., dinophyceae).' Journal of Phycology, 47 (4). 775 - 783. ISSN 0022-3646

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Abstract

Dimethyl sulfide (DMS) and dimethylsulfoniopropionate (DMSP) are sulfur compounds that may function as antioxidants in algae. Symbiotic dinoflagellates of the genus Symbiodinium show strain-specific differences in their susceptibility to temperature-induced oxidative stress and have been shown to contain high concentrations of DMSP. We investigated continuous cultures of four strains from distinct phylotypes (A1, A13, A2, and B1) that can be characterized by differential thermal tolerances. We hypothesized that strains with high thermal tolerance have higher concentrations of DMSP and DMS in comparison to strains with low thermal tolerance. DMSP concentrations were strain-specific with highest concentrations occurring in A1 (225±3.5mmol·L-1 cell volume [CV]) and lowest in A2 (158±3.8mmol· L-1CV). Both strains have high thermal tolerance. Strains with low thermal tolerance (A13 and B1) showed DMSP concentrations in between these extremes (194±19.0 and 160±6.1mmol·L-1 CV, respectively). DMS data further confirmed this general pattern with high DMS concentrations in A1 and A13 (4.1±1.22 and 2.1±0.37mmol·L-1CV, respectively) and low DMS concentrations in A2 and B1 (0.3±0.06 and 0.5±0.22mmol·L-1 CV, respectively). Hence, the strain-specific differences in DMSP and DMS concentrations did not match the different abilities of the four phylotypes to withstand thermal stress. Future work should quantify the possible dynamics in DMSP and DMS concentrations during periods of high oxidative stress in Symbiodinium sp. and address the role of these antioxidants in zooxanthellate cnidarians. © 2011 Phycological Society of America.

Item Type: Article
Subjects: Q Science > QH Natural history > QH301 Biology
Divisions: Faculty of Science and Health > Biological Sciences, School of
Depositing User: Admin
Date Deposited: 04 Aug 2011 15:07
Last Modified: 19 Jun 2019 10:15
URI: http://repository.essex.ac.uk/id/eprint/349

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