Sulfur-containing amino acid methionine as the precursor of volatile organic sulfur compounds in algea-induced black bloom
Sulfur-containing amino acid methionine as the precursor of volatile organic sulfur compounds in algea-induced black bloom
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含硫氨基酸蛋氨酸作为藻类引起的黑华中挥发性有机硫化合物的前体
DOI：
10.1016/s1001-0742(12)60019-9
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发表时间：
2013-01-01
影响因子：
6.9
通讯作者：
Yin, Hongbin
中科院分区：
文献类型：
--
作者：
Lu, Xin;Fan, Chengxin;Yin, Hongbin
施用蛋氨酸后，甲硫醇(MESH)、二甲基硫(DMS)、二甲基二硫化物(DMDS)、二甲基三硫醚(DMTS)和二甲基四硫醚(DMTeS)等5种挥发性有机硫化合物(VOSCs)的含量呈进行性显著增加。即使在没有添加蛋氨酸的未经处理的对照中，蛋氨酸及其分解代谢产物(VOSCs，主要是DMDs)也被发现有相当多的含量，足以解释水的恶臭。然而，只有在两个蛋氨酸修正的处理中才会发生变黑。观察到VOSCs的产生先于黑色的形成，VOSCs总量达到峰值后往往是水变黑。葡萄糖的存在促进了蛋氨酸的降解，延缓了黑色的发生，抑制了VOSCs的产生。此外，。DMDS是单独添加蛋氨酸后产生的最丰富的化合物，DMTeS似乎是添加蛋氨酸+葡萄糖后产生的最重要的化合物。这些结果表明，蛋氨酸是遭受乙醇诱导的黑水华湖泊中VOSCs的重要前体。葡萄糖的存在可能会改变蛋氨酸转化为VOSCs的途径，形成更大分子量的化合物，如DMTs和DMTeS。
After the application of methionine, a progressive and significant increase occurred in five volatile organic sulfur compounds (VOSCs): methanethiol (MeSH), dimethyl sulfide (DMS), dimethyl disulfide (DMDS), dimethyl trisulfide (DMTS) and dimethyl tetrasulfide (DMTeS). Even in the untreated control without a methionine addition, methionine and its catabolites (VOSCs, mainly DMDS) were found in considerable amounts that were high enough to account for the water's offensive odor. However, blackening only occurred in two methionine-amended treatments. The VOSCs production was observed to precede black color development, and the reaching of a peak value for total VOSCs was often followed by water blackening. The presence of glucose stimulated the degradation of methionine while postponing the occurrence of the black color and inhibiting the production of VOSCs. In addition,. DMDS was found to be the most abundant species produced after the addition of methionine alone, and DMTeS appeared to be the most important compound produced after the addition of methionine+glucose. These results suggest that methionine acted as an important precursor of the VOSCs in lakes suffering from algea-induced black bloom. The existence of glucose may change the transformation pathway of methionine into VOSCs to form larger molecular weight compounds, such as DMTS and DMTeS.