title: [Generation and release of Microcystin-lR by Microcystis aeruginosa under hydroquinone inhibition].
abstract: The generation and release of algal toxin Microcystin-LR (MCLR), as well as the intracellular organic chemicals were studied during the inhibition processes of Microcystis aeruginosa using hydroquinone as the inhibitor. According to the dose-effect relationship, the corresponding dosages of EC20, EC50, EC70, EC90, EC99 were added to the algae suspension. The TOC was determined by the total organic carbon analyzer, and the three-dimensional fluorescence spectrum was obtained by the fluorescence spectrophotometer. The results showed that the generation of MCLR was inhibited at EC20 and the total MCLR was 72.4%-83.0% of the control samples. Whereas the cells were stimulated to produce higher amount of MCLR, and the total MCLR was 1.77-3.13 times as high as that of the control samples at EC50-EC99. The intracellular MCLR was largely released to the water at EC70-EC99. The release of other intracellular organic chemicals mainly referred to humic-like and fulvic-like substances, which were unstable and had an obvious degradation and transformation after 6 days of cultivation.
authors.forename: Yuan-Chun
authors.initials: YC
authors.lastname: Zhang
authors.forename: Wen-Yan
authors.initials: WY
authors.lastname: Liang
authors.forename: Yuan
authors.initials: Y
authors.lastname: Zhao
authors.forename: Fei-Zhen
authors.initials: FZ
authors.lastname: Li
authors.forename: Jing-Can
authors.initials: JC
authors.lastname: Cao
authors.forename: Shao-Jie
authors.initials: SJ
authors.lastname: Hu
mesh_terms: D006873:Hydroquinones / Q000737:chemistry*; D008387:Marine Toxins; D052998:Microcystins / Q000378:metabolism*; D046931:Microcystis / Q000187:drug effects / Q000378:metabolism*; D009930:Organic Chemicals / Q000378:metabolism
chemical_list: D006873:Hydroquinones; D008387:Marine Toxins; D052998:Microcystins; D009930:Organic Chemicals; C057862:cyanoginosin LR; C031927:hydroquinone