Department of Microbiology, University of Groningen, Kerklaan 30, 9751 NN Haren, The Netherlands.
Appl Environ Microbiol. 1991 Nov;57(11):3237-42. doi: 10.1128/aem.57.11.3237-3242.1991.
The fate of dimethylsulfoniopropionate (DMSP), a major sulfonium compound in marine ecosystems, was examined in Microcoleus chthonoplastes-dominated microbial mats. Chemical decomposition of DMSP was observed under laboratory conditions at pH values higher than 10.0. pH profiles measured in situ showed that these highly alkaline conditions occurred in microbial mats. Axenic cultures of M. chthonoplastes contained 37.3 mumol of DMSP g of protein, which was partially liberated when the cells were subjected to an osmotic shock. DMSP-amended mat slurries showed a rapid turnover of this compound. The addition of glutaraldehyde blocked DMSP decrease, indicating biological consumption. Populations of potential dimethyl sulfide consumers were found in the top 10 mm of the mat.
研究了海洋生态系统中主要的硫鎓化合物二甲基巯基丙酸酯（DMSP）在微鞘藻主导的微生物垫中的命运。在实验室条件下，在 pH 值高于 10.0 的情况下观察到 DMSP 的化学分解。原位测量的 pH 曲线表明，这些高碱性条件发生在微生物垫中。微鞘藻的无菌培养物含有 37.3 µm ol 的 DMSP g 蛋白，当细胞受到渗透冲击时，部分 DMSP 被释放出来。添加 DMSP 的垫泥浆显示出该化合物的快速转化。戊二醛的添加阻止了 DMSP 的减少，表明其被生物消耗。在微生物垫的前 10 毫米处发现了潜在的二甲硫醚消费者种群。
