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Phytochelatin production in marine algae. 2. Induction by various metals

机译:海洋藻类中植物螯合素的生产。 2.各种金属的感应

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Phytochelatin has been quantified in Thalassiosira weissflogii, a marine diatom after exposure to a series of trace metals (Cd, Pb, Ni, Cu, Zn, Co, Ag, and Hg) at concentrations similar to those in the marine environment. Within the range of concentrations relevant to natural waters, Cd, and to a lesser extent Cu and Zn, are the most effective inducers of phytochelatins. The generality of this result was confirmed by short-term experiments with two other phytoplankton species. Quantification of intracellular Cd, Ni, and Zn shows that phytochelatin production does not follow a simple stoichiometric relationship to the metal quotas. The rapid formation of phytochelatin in T. weissflogii after Cd exposure and the fast elimination when metal exposure is alleviated reveal a dynamic pool of phytochelatin which is tightly regulated by the cell.
机译:在暴露于一系列痕量金属(Cd,Pb,Ni,Cu,Zn,Co,Ag和Hg)的浓度类似于海洋环境中的海洋硅藻中,已经在海洋硅藻Thalassiosira weissflogii中对植物螯合素进行了定量。在与天然水有关的浓度范围内,镉和较小量的铜和锌是最有效的植物螯合素诱导剂。该结果的普遍性已通过其他两种浮游植物物种的短期实验得以证实。胞内Cd,Ni和Zn的定量显示,植物螯合素的产生并不与金属定额简单的化学计量关系。镉暴露后,魏斯木霉中植物螯合素的快速形成以及缓解金属暴露后的快速消除表明,细胞中紧密结合了植物螯合素的动态库。

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