薄荷醇胁迫对淡水蓝藻铜绿微囊藻 FACHB-905 生长和微囊藻毒素释放的影响。
Effects of d-menthol stress on the growth of and microcystin release by the freshwater cyanobacterium Microcystis aeruginosa FACHB-905.
机构信息
College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China.
College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China.
出版信息
Chemosphere. 2014 Oct;113:30-5. doi: 10.1016/j.chemosphere.2014.03.084. Epub 2014 May 8.
The effects of d-menthol on the growth of Microcystis aeruginosa FACHB-905 and microcystin (MCY) concentration were evaluated by batch culture experiments. The algal biomass and the intracellular and extracellular MCY concentrations were evaluated during 5d incubation. After the d-menthol exposure, the dry weight of the cells gradually decreased; the decrease in the dry weight after 5d exposure was 29, 12, and 2mgL(-1) when the initial cell densities were 1.4×10(7), 1.2×10(6), and 2.9×10(5)cellmL(-1), respectively. The results indicate that the d-menthol exposure inhibited the cellular growth, thus also inhibiting the increase of the total MCY concentration. In the presence of d-menthol, the intracellular MCY was gradually released into the medium after the cell lysis. The extracellular MCY concentration in the medium was significantly higher in the d-menthol-exposed samples than in the control samples, confirming that d-menthol cannot decompose the extracellular MCY.
采用批式培养实验，评估了 D-薄荷醇对铜绿微囊藻 FACHB-905 生长和微囊藻毒素（MCY）浓度的影响。在 5d 孵育期间评估藻细胞生物量以及细胞内和细胞外 MCY 浓度。暴露于 D-薄荷醇后，细胞的干重逐渐下降；当初始细胞密度分别为 1.4×10(7)、1.2×10(6)和 2.9×10(5)cellmL(-1)时，5d 暴露后的干重下降分别为 29、12 和 2mgL(-1)。结果表明，D-薄荷醇暴露抑制了细胞生长，从而也抑制了总 MCY 浓度的增加。在 D-薄荷醇存在下，细胞裂解后细胞内的 MCY 逐渐释放到培养基中。培养基中细胞外 MCY 浓度在 D-薄荷醇暴露样品中明显高于对照样品，证实 D-薄荷醇不能分解细胞外的 MCY。
Zotero 插件