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采用水培方法,研究不同浓度镉(Cd)(0、0.5、2.5、5、10和25mg·L-1)胁迫下金银花的生长特征,分析低浓度Cd对金银花产生的毒物刺激效应.结果表明:低浓度Cd处理(≤5mg·L-1)对金银花最大根长、植株干质量以及叶绿素a、叶绿素b和类胡萝卜素含量均产生显著刺激效应,分别比对照增加13.6%、11.7%、14.0%、10.8%和54.5%;低浓度Cd(≤5mg·L-1)对叶片含水量表现出一定程度的促进作用,但影响不显著;当Cd浓度≥10mg·L-1,对金银花的生长表现出显著的抑制作用.当Cd浓度为25mg·L-1时,金银花地上部Cd含量达到622.93mg·kg-1,表明金银花对Cd具有较强的超富集能力.Cd对金银花产生毒物刺激效应的剂量范围为0.5～5mg·L-1.
The growth characteristics of honeysuckle under different concentrations of Cd (0, 0.5, 2.5, 5, 10, and 25 mg · L-1) were studied by hydroponics, and the toxic effects of low concentrations of Cd on honeysuckle were analyzed.The results showed (P <0.05). The effects of low concentration Cd treatment (≤5mg · L-1) on the maximum root length, plant dry weight, chlorophyll a, chlorophyll b and carotenoid content were significantly increased by 13.6%, 11.7% and 14.0 %, 10.8% and 54.5%, respectively. Cd at low concentration (≤5mg · L-1) had some effects on the leaf water content, but had no significant effect. Showed a significant inhibition.When Cd concentration was 25mg · L-1, the Cd content in shoots reached 622.93mg · kg-1, indicating that Honeysuckle has a strong ability to super-enrich Cd.Cd toxic effects on honeysuckle Effect of the dose range of 0.5 ~ 5mg · L-1.