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塔玛亚历山大藻对海产双壳类生命活动的影响

, PP. 81-86

Keywords: 赤潮,塔玛亚历山大藻,双壳类,毒性作用,未知毒素

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Abstract:

通过一种重要有毒赤潮藻——产麻痹性贝毒毒素PSP的塔玛亚历山大藻对几种海产双壳类主要发育阶段:受精卵、D形幼虫、眼点幼虫、稚贝、仔贝和成贝生命活动的影响研究,发现该藻对双壳类孵化率、存活率、运动能力、滤食率和生长都有影响,毒性效应与藻密度有明显的相关关系.该藻对受精卵的抑制作用在100个/cm3的密度下最显著,36h后孵化率仅为对照组的30%.进一步的逐项毒性筛选实验表明此毒性来源于藻液、藻细胞和细胞碎片,而与去藻过滤液、藻细胞内容物、标准毒素STX无关,由此可以证实塔玛亚历山大藻确能产生一类非PSP毒素,并与细胞表面的未知毒素相关.

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