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鼠尾藻提取物对亚历山大藻的化感效应

DOI: 10.3724/SP.J.1145.2011.00694, PP. 694-699

Keywords: 大型海藻,鼠尾藻,化感效应,赤潮微藻,亚历山大藻

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Abstract:

研究不同浓度的鼠尾藻组织蒸馏水及4种不同极性有机溶剂(甲醇、丙酮、乙醚、氯仿)提取物对亚历山大藻的生长抑制作用.结果表明:鼠尾藻组织甲醇提取物对亚历山大藻的生长抑制活性最强,大于3×10-8mgkg-1浓度作用下亚历山大藻在1d内完全死亡;鼠尾藻组织蒸馏水抽提物与对照组相比在各个浓度时均能显著抑制亚历山大藻的生长,但即使在最高浓度1.6×10-6mgkg-1下亦对其无致死效应;其他3种有机溶剂提取物对亚历山大藻的生长无明显影响.表明鼠尾藻组织中含有的对亚历山大藻具有抑制作用的活性物质具有较高的极性.对鼠尾藻甲醇提取物进行液液萃取,将其分离为石油醚相、乙酸乙酯相、正丁醇相和蒸馏水相,并对亚历山大藻进行生物活性检测.结果发现,石油醚相和乙酸乙酯相具有较强的杀藻活性,表明脂肪酸可能是鼠尾藻组织内抑制亚历山大藻生长的克生物质的重要组成成分之一.图3参36

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