UV-B辐射和蒽共同作用对三叶浮萍的毒性效应

Joint Toxic Effects of UV-B Radiation and Anthracene on Lemna Minor

本实验采用常见的三叶浮萍作为实验材料,研究了多环芳烃(PAHs)蒽(Anthracene)与UV-B辐射单独胁迫和共同作用对浮萍(Lemna minor)的毒性效应.浮萍的初始个数为45个,蒽的质量浓度分别设为0、0.5、2.5、5、10、20 mg·L-1,设计三个个平行组,每组辐射剂量均是810 J·m-2.结果表明,蒽、紫外线单独胁迫都会对浮萍产生损害,使其生长量有下降趋势.当辐射剂量达到810 J·m-2时,叶绿素含量达到最大,随着辐射剂量的增加,叶绿素含量减少.且随着蒽浓度的不断增大,对浮萍生长的其抑制作用更加明显,存在着明显的剂量-效应关系.蒽和UV-B辐射共同作用对浮萍产生抑制作用,并且随着蒽浓度的增加,抑制作用逐渐增强.

In this paper,the growth responses of Lemna minor to UV-B radiation and anthracere treatment were studied by single-factor analysis of variance method.Before the experiment,the number of the Lemna minor was 45.The concentration of anthracene were designed at 0,0.5,2.5,5,10,20 mg·L-1.The radiation dose of UV-B were 810 J·m-2.The results show that the Lemna minor is injured by different concentrations of anthracene and UV-B radation.The mass growth declines.The common effect of UV-B radiation and anthracene on Lemna minor was inhibition.Follow with the increase of the concentration of anthracene,the inhibition is gradually strenghened.