【摘要】 采用土培实验,研究了佳乐麝香(HHCB)和吐纳麝香(AHTN)对小麦种子发芽的生态毒性,测定了这2种人工合成麝香对小麦种子发芽率、根伸长抑制率和芽伸长抑制率的影响.结果表明,小麦种子的发芽率与这2种人工合成麝香浓度之间剂量-效应关系不明显,低剂量条件下(佳乐麝香≤150 mg.kg-1,吐纳麝香≤200 mg.kg-1),对小麦发芽具有一定的促进作用.在实验浓度范围内,佳乐麝香和吐纳麝香处理下小麦的发芽率分别为77.78%～95.56%和84.44%～97.78%.小麦的根伸长抑制率(或芽伸长抑制率)与2种人工合成麝香的浓度之间均存在良好的剂量-效应关系.利用线性模型计算得出的佳乐麝香和吐纳麝香对小麦芽长的EC50分别为155.84 mg.kg-1和290.58 mg.kg-1,对小麦根伸长的EC50分别为215.66 mg.kg-1和323.10 mg.kg-1.2种人工合成麝香对小麦敏感部位的EC50值表明佳乐麝香对小麦的毒性要强于吐纳麝香.更多还原

【Abstract】 With soil culture the ecotoxicological effects of galaxolide(HHCB) and tonalide(AHTN) on the germination of wheat(Triticum aestivum) seeds were investigated.And the influence of these two synthetical musks on the wheat germination rate,inhibition rate of root elongation and inhibition rate of shoot elongation were studied.The results showed that there were no obvious dose-effect relationship between wheat germination rate and concentrations of these two synthetical musks·Lower dose(HHCB≤150 mg.kg-1,AHTN≤200 mg.kg-1) could accelerate the germination of wheat.Under the test concentrations of synthetical musks,the wheat germination rates treated with HHCB and AHTN were 77.78%-95.56% and 84.44%-97.78%,respectively.There were good dose-effect relationship between inhibition rate of root elongation(or inhibition rate of shoot elongation) and synthetical musks concentrations.The EC50 of HHCB and AHTN based on shoot were 155.84 mg.kg-1 and 290.58 mg.kg-1,and were 215.66 mg.kg-1 and 323.10 mg.kg-1 based on root from linear model.The EC50 of wheat sensitive positions showed that the toxicity of HHCB was stronger than AHTN.更多还原