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中国农学通报 ›› 2014, Vol. 30 ›› Issue (5): 249-253.doi: 10.11924/j.issn.1000-6850.2013-1581

所属专题: 生物技术

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

黑藻(Hydrilla verticillata)对重金属Cd2+的积累及生理响应

焦轶男 朱宏   

  • 收稿日期:2013-06-06 修回日期:2013-07-22 出版日期:2014-02-15 发布日期:2014-02-15
  • 基金资助:
    黑龙江省研究生创新科研资金项目 “一种新发现的黑龙江地区重金属超富集植物” (YJSCX2012—162HLJ)。

Physiological Responses of Hydrilla verticillata to Cadmium and Cadmium Bioaccumulation

  • Received:2013-06-06 Revised:2013-07-22 Online:2014-02-15 Published:2014-02-15

摘要: 以黑藻(Hydrilla verticillata )为材料,研究不同浓度重金属Cd2+处理下,黑藻各部位对重金属的积累程度以及部分生理指标的变化趋势,以明确黑藻是否具有植物修复的潜力。采用原子吸收光谱法对植物各部位积累重金属程度进行检测,采用比色法对植物材料部分生理指标进行检测。结果表明,与茎相比,黑藻叶部对重金属有高浓度的积累;另外,随着重金处理浓度的增加保护酶体系中的过氧化氢酶(POD)、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)活性均呈先上升后下降的趋势;膜质过氧化物丙二醛(MDA)含量则呈先下降后平稳最后上升的趋势,分析可知保护酶系统的激活会对MDA起到一定抑制作用,从而保护重金属胁迫下植物的膜系统。以上结果表明,黑藻可以积累一定浓度的重金属,对适当浓度范围内的重金属Cd2+表现出明显的生理性适应,黑藻具有植物修复潜力。

关键词: 遗传, 遗传

Abstract: In order to evaluate the potential of phytoremediation application of Hydrilla verticillata, The accumulation of heavy metals and the changes of some physiological indexes for Hydrilla vericillata were investigated. The results showed that, compared with stems, leaves of Hydrilla accumulated higher concentrations of heavy metals. Moreover, the activities of SOD, POD and CAT first increased and then decreased as the Cd2+ concentration increased. The content of membranous peroxide MDA first decreased, and then remained stable and last increased. It concluded that activate the protective enzyme system could inhibit MDA formation. These results suggested that Hydrilla verticillata could accumulate a certain concentration of heavy metals, in a certain concentration range of heavy metals it exhibitted physiological adaptation. In summary, Hydrilla verticillata had the potential of phytoremediation.