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首页> 外文期刊>Limnologica >Iron-stimulated growth and microcystin production of Microcystis novacekii UAM 250
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Iron-stimulated growth and microcystin production of Microcystis novacekii UAM 250

机译：铁刺激的微囊藻Uvac 250的生长和微囊藻毒素生产

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The impact of iron on growth and microcystin production was studied using the cyanobacterium Microcystis novacekii UAM 250. Four different iron concentrations, ranging from 0 to 5 mu M, were used, while other nutrients remained constant. Growth of the cyanobacterium and the production of intracellular microcystin were maximal at the highest iron concentration. Three types of microcystins were identified: MCYST-LR, -YR, and -RR. The concentrations of microcystins in the medium (extracellular microcystins) were lowest at the initial growth phase of the cyanobacterium and increased subsequently as the cells began to decay, releasing their microcystin content to the water phase. Most cyanobacteria blooms occur in eutrophic water bodies. In most sewage treatment plants more iron is used than is required for optimal phosphorus removal. However, iron is a particularly important micronutrient for cyanobacteria. This research is relevant to understanding the potential effects of excess iron discharge from sewage treatment plants on toxin production by cyanobacteria.
机译：使用蓝藻微囊藻Uvac 250研究了铁对生长和微囊藻毒素生产的影响。使用了4种不同的铁浓度，范围从0到5μM，而其他养分保持不变。在最高铁浓度下，蓝藻细菌的生长和胞内微囊藻毒素的产量最高。确定了三种类型的微囊藻毒素：MCYST-LR，-YR和-RR。培养基中微囊藻毒素的浓度（细胞外微囊藻毒素）在蓝藻的初始生长阶段最低，随后随着细胞开始腐烂而增加，从而将微囊藻毒素的含量释放到水相中。大多数蓝细菌水华发生在富营养化的水体中。在大多数污水处理厂中，铁的使用要比最佳除磷所需的铁更多。但是，铁是蓝细菌特别重要的微量营养元素。这项研究与了解污水处理厂排出的过量铁对蓝细菌产生毒素的潜在影响有关。

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