Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University, Lessingstr. 8, 07743 Jena (D), Germany.
Mar Environ Res. 2012 Feb;73:62-9. doi: 10.1016/j.marenvres.2011.11.002. Epub 2011 Nov 12.
The sulfur metabolite dimethylsulfoniopropionate (DMSP) is the most important precursor of the climate relevant metabolite dimethylsulfide (DMS). It has thus gained interest in the context of climate change and several studies investigated the influence of elevated temperature and/or CO(2) on DMSP in complex plankton communities. However, only little information about changes in response to these factors in single species is available. Therefore, we analyzed DMSP in different phytoplankton cultures (Thalassiosira pseudonana, Phaeodactylum tricornutum, Emiliania huxleyi) under the influence of increased temperature by 6 °C and elevated CO(2) to 790 ppmv. In addition, we addressed glycine betaine (GBT) that fulfills a similar function as osmolyte like DMSP. In all cultures GBT concentrations increased at higher temperature and decreased at elevated CO(2). In contrast, diatoms and prymnesiophytes revealed opposite trends for DMSP. In diatoms increased CO(2) and temperature led to decreased DMSP concentrations, while rather elevated levels of this metabolite under the influence of these parameters were observed for E. huxleyi.
硫代谢物二甲基巯基丙酸酯（DMSP）是气候相关代谢物二甲基硫（DMS）的最重要前体。因此，它在气候变化的背景下引起了人们的兴趣，许多研究调查了高温和/或 CO（2）对复杂浮游生物群落中 DMSP 的影响。然而，关于这些因素对单一物种的响应变化的信息很少。因此，我们分析了不同浮游植物培养物（假交替单胞藻、三角褐指藻、埃氏藻）在温度升高 6°C 和 CO（2）升高至 790 ppmv 条件下 DMSP 的变化。此外，我们还研究了甘氨酸甜菜碱（GBT），它作为一种类似于 DMSP 的渗透调节剂发挥作用。在所有培养物中，GBT 浓度随温度升高而增加，随 CO（2）升高而降低。相比之下，硅藻和甲藻的 DMSP 趋势相反。在硅藻中，增加的 CO（2）和温度导致 DMSP 浓度降低，而埃氏藻在这些参数的影响下，这种代谢物的水平相当高。
