基于小麦种子发芽和根伸长的麝香酮污染毒性效应

Toxic effect of musk ketone based on the determinations of wheat (Triticum aestivum) seed germination and root elongation.

研究了新型污染物麝香酮对小麦种子发芽及幼苗生长的影响.结果表明,土壤麝香酮(10mg·kg-1)污染对小麦发芽率抑制作用达到显著水平(P<0.05),对小麦根长和芽长的抑制作用达极显著水平(P<0.01),并且芽长、根长与土壤中麝香酮浓度之间存在极显著(P<0.01)的剂量-效应关系.表明小麦根和芽伸长可以指示土壤麝香酮的污染程度.在土壤麝香酮污染条件下,小麦幼苗的根长和芽长之间呈极显著(P<0.01)的正相关性,发芽率和生物量之间呈极显著(P<0.01)的负相关性.有机污染物的毒性除了与它在水中的溶解度有关外,还与其化学性质及对靶标生物的毒性机制有关.

Through the determinations of wheat （Triticum aestivum） seed germination and seedling growth, the toxic effect of emerging pollutant musk ketone was investigated. The results showed that 10 mg · kg^-1 of musk ketone could significantly inhibit the seed germination rate （P 〈0. 05） and the seedling＇ s root- and shoot elongation of wheat （ P 〈 0. 01 ）, and there existed a significant （ P 〈 0. 01 ） dose-effect relationship between musk ketone and root- and shoot elongation, suggesting that the seedling ＇ s root- and shoot elongation of wheat could indicate the pollution extent of musk ketone in soil. The correlation analysis revealed that under soil musk ketone pollution, there was a significant （P 〈0. O1 ） positive correlation between root- and shoot elongation, and a significant （P 〈 0. 01 ） negative correlation between seed germination and biomass. Besides the solubility in water, the toxicity of organic pollutant was related to its chemical characters, and its action mechanisms to the target organism.