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海洋科学  2005 

化学物质对硬壳蛤幼虫变态的诱导

, PP. 59-67

Keywords: 化学物质,硬壳蛤(Mercenaria,mercenaria,L.,),变态,诱导

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Abstract:

用KCl、肾上腺素(EPI)、去甲肾上腺素(NE)、L-DOPA和GABA(γ-氨基丁酸)进行了不同浓度不同处理时间对硬壳蛤(MercenariamercenariaL.)幼虫变态诱导实验。结果表明,KCl、肾上腺素、去甲肾上腺素和L-DOPA对硬壳蛤幼虫的变态均有诱导作用,而GABA的诱导作用不显著。KCl的最佳诱导浓度随处理时间不同而有所不同。处理时间为1~24,48,72h时KCl的最佳诱导浓度分别为33.56,20.13~26.85,13.42mmol/L。肾上腺素和去甲肾上腺素的诱导作用与浓度和处理时间均有关。肾上腺素的最佳处理浓度为100μmol/L,最佳处理时间均为8h,此时幼虫变态率提高最大,为36.97个百分点。当去甲肾上腺素的诱导浓度为100μmol/L,处理时间为8~16h时,幼虫变态率提高也较大,均大于18个百分点,死亡率增加,但均低于30个百分点,当去甲肾上腺素诱导浓度为500μmol/L时,虽然在8~16h的处理时间范围内,幼虫变态提高率也较大,均大于18个百分点,但当处理时间超过8h,在16~48h范围内,幼虫死亡率提高明显增大,均大于50个百分点。L-DOPA的适宜诱导浓度为10~50μmol/L,适宜处理时间为8~24h,此时幼虫变态率均提高30个百分点以上,最高可提高79.43个百分点。GABA的诱导作用较弱,最佳诱导浓度随处理时间的不同而有所不同,处理时间为24h和48h时,最佳诱导浓度为0.1μmol/L;处理时间为0.5~16h时,最佳诱导浓度为100μmol/L。

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