喜旱莲子草对重金属元素的耐性试验研究

[目的]研究喜旱莲子草[Alternanthera philoxeroides（Mart.）Griseb.]对部分常见重金属污染的耐性。[方法]测定了在不同浓度重金属（Cu、Zn和Pb）处理条件下植株高度、根长、节数和新萌蘖芽数等形态学响应指标。[结果]3种重金属的不同浓度特别是较高浓度处理时,喜旱莲子草的各个指标均呈明显的下降趋势,即重金属在较高浓度的处理时对该植物的生长具有抑制作用;通过比较,发现该植物对Pb的耐性较强。[结论]喜旱莲子草能够在一定浓度的重金属污染环境中生存,可以作为一种重金属富集植物。

Study on Tolerance of Alternanthera philoxeroides to Heavy Metals

[Objective]The purpose was to study the tolerant ability of Alternanthera philoxeroides to heavy metals of the invasive plant. [Method] The morphological traits including the plant height,root length,number of nods and number of tillering of the host plant was invesigated and studied under the treatment of the different concentration of heavy metals. [ Result] All morphological traits of the host plant decreased significantly as the heavy metals concentraitions raised; compared with the other heavy metals,the torlearance of the host plant was stronger. [Conclusion]The results indicated that A. philoxeroides was able to survive in a certain concentration of heavy metals pollution of the environment and it was the accumulation heavy metal plant species.