中文摘要
富营养化水体中微囊藻毒素的产生和存在对饮用水的水质安全构成了严重威胁。氮磷碳等生源要素从生理上促进了藻类生长，但生源要素的存在数量和具体形态与毒藻产毒特性及藻毒素结构/毒性之间的内在关系等藻毒素产生的深层机理尚不明确，这是制约富营养化水体毒藻及藻毒素治理的重要基础科学问题。本研究以富营养化水体中N、P、C等生源要素与毒藻产毒特性及藻毒素结构毒性之间的内在关系为核心，利用同位素示踪技术和室内批量培养方法，从生源要素在微囊藻毒素生物合成过程中的作用出发，研究"生源要素-藻细胞-藻毒素"之间的内在关系，探索生源要素种类、形态和数量等对毒藻生理特性及产毒特性的改变，以及对毒藻合成微囊藻毒素的分子结构和毒性的影响，探索了氮磷等生源要素在微囊藻毒素分子生化合成中作用，并利用光电协同技术探索了微囊藻毒素分子化学分解的主要途径，为富营养化水体中微囊藻毒素产生与降解提供了科学基础，有助于富营养化水体藻毒素污染控制以及湖泊水质的改善。
英文摘要
The security of water quality of eutrophication water bodies is gradually and severely threatened by the presence of microcystins. But little of the mechanism of production of microcystins is known. Although we know the growth of algae can be promoted by some nutritive factors such as N, P and C etc, the effects of nutritive factors on the production of the microcystins keeps unknown. However, the relationship between nutrition and the production of microcystins is an important scientific problem. The poor comprehension of this issue has beeen restricted the development of science and technology to control the presence of microcystins in entrophication waters.In this program, the isotopes tracer and batch culture are employed to research the relationship between nutrition and microcystins and to discovery the mechanism of the production of microcystins based on the relationship. The roles of the forms of nutritive factors are considered. The change of the toxin-producing characters of algal cells is observed. The structure and character of microcystin molecular are paid more attention. All the research goes around the clue of "nutritive factors-algal cells-algal toxin". The chemolysis of MC-LR is researched by the method of the photoelectrochemoical cytalytic oxidation.In short, this program is build up the scientific base for controlling poisonous algal bloom and algal toxins and for improving water quality of eutrophication water bodies.
结题摘要
富营养化水体中微囊藻毒素的产生和存在对饮用水的水质安全构成了严重威胁。氮磷碳等生源要素从生理上促进了藻类生长，但生源要素的存在数量和具体形态与毒藻产毒特性及藻毒素结构/毒性之间的内在关系等藻毒素产生的深层机理尚不明确，这是制约富营养化水体毒藻及藻毒素治理的重要基础科学问题。本研究以富营养化水体中N、P、C等生源要素与毒藻产毒特性及藻毒素结构毒性之间的内在关系为核心，利用同位素示踪技术和室内批量培养方法，从生源要素在微囊藻毒素生物合成过程中的作用出发，研究"生源要素-藻细胞-藻毒素"之间的内在关系，探索生源要素种类、形态和数量等对毒藻生理特性及产毒特性的改变，以及对毒藻合成微囊藻毒素的分子结构和毒性的影响，探索了氮磷等生源要素在微囊藻毒素分子生化合成中作用，并利用光电协同技术探索了微囊藻毒素分子化学分解的主要途径，为富营养化水体中微囊藻毒素产生与降解提供了科学基础，有助于富营养化水体藻毒素污染控制以及湖泊水质的改善。