THE TOXICITY OF ALUMINUM TO 2 ACIDO-TOLERANT GREEN-ALGAE
THE TOXICITY OF ALUMINUM TO 2 ACIDO-TOLERANT GREEN-ALGAE
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DOI：
10.1016/0043-1354(88)90144-3
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发表时间：
1988-08-01
期刊：
影响因子：
12.8
通讯作者：
TORNQVIST, L
中科院分区：
文献类型：
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作者：
CLAESSON, A;TORNQVIST, L
在pH值为5.0 ~ 6.0的范围内，以生态相关浓度的铝对两种绿藻——戴氏单胞藻（Monoraphidium dybowski）和衣球菌（Stichococcus sp.）进行了暴露。批培养试验表明，两种植物的耐受性反应存在一定差异。在0.10 mg Al -1时可检测到细胞分解，但在较高的Al浓度下更明显。当考虑EC50值时，单孢菌对铝的耐受性高于球菌。当暴露于1mg Al -1时，该藻类的生长速度降至对照的50%。对球菌的EC50值为0.52 mg Al -1。在测量最大细胞生物量减少50%后，两种藻类都注意到大约相同的值（0.4 mg Al -1）。对生长曲线下面积的计算给出了一个更完整的生长响应，导致两种藻类的值都处于中间水平，但stihococcus的值仍然是monooraphidium的一半。然而，铝的无有效浓度（NOEC）和最低浓度显著效应（LCSE）的值较低（约0.02 mg l-1），而对蜱虫（0.11 ~ 0.23 mg l-1），随着铝浓度的增加，反应更为显著。在生长实验中，细胞数量的增加受到越来越大的影响。然而，在暴露3天以上后，淋球菌细胞似乎在一定程度上适应，在中等铝浓度下再暴露几天后表现出更高的耐受性。
Two green algae, Monoraphidium dybowskii and Stichococcus sp. were exposed to aluminum at some ecologically relevant concentrations within a pH range of 5.0-6.0. Growth experiments in batch cultures showed some difference in tolerance response between the two species. Cell decomposition was detectable at 0.10 mg Al l-1 but was more pronounced at higher Al concentrations. Monoraphidium showed higher tolerance to aluminium than did Stichococcus when EC50 values were considered. The growth rate of this alga was reduced to 50% of the control when it was exposed to 1 mg Al l-1. The EC50 value for Stichococcus was 0.52 mg Al l-1. Upon measurement of the 50% reduction in maximum cell biomass, about the same values (0.4 mg Al l-1) were noted for both algae. Calculation of the area under the growth curve gave a more integrated growth response resulting in intermediate values for both algae but still half as high for Stichococcus as for Monoraphidium. However, no effective concentration (NOEC) and least concentration significant effect (LCSE) of aluminium, were signified by lower values (around 0.02 mg l-1) for Monoraphidium compared with those (0.11-0.23 mg l-1) for Stichococcus, which responded more dramatically when the Al concentrat ion was increased. The increase in cell number production was progressively more affected during the growth experiments. Cells of Stichococcus however, seemed to adapt to some extent after more than 3 days of exposure, showing higher tolerance at intermediate Al concentrations after some additional days of exposure.