东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2006, Vol. 27 ›› Issue (10): 1161-1164.DOI: -

• 论著 • 上一篇    下一篇

紫花苜蓿对土壤中铜的富集效应及其生理响应

王文星;曹成有;崔振波;徐淑坤;   

  1. 东北大学理学院;东北大学理学院;东北大学理学院;东北大学理学院 辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004
  • 收稿日期:2013-06-23 修回日期:2013-06-23 出版日期:2006-10-15 发布日期:2013-06-23
  • 通讯作者: Wang, W.-X.
  • 作者简介:-
  • 基金资助:
    国家“十五”科技攻关项目(2005BA517A08);;

Copper enrichment from contaminated soil by alfalfa and its physiological response

Wang, Wen-Xing (1); Cao, Cheng-You (1); Cui, Zhen-Bo (1); Xu, Shu-Kun (1)   

  1. (1) School of Sciences, Northeastern University, Shenyang 110004, China
  • Received:2013-06-23 Revised:2013-06-23 Online:2006-10-15 Published:2013-06-23
  • Contact: Wang, W.-X.
  • About author:-
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摘要： 依据我国土壤环境质量标准设置10个铜污染指标(1~400mg.kg-1),采用盆栽试验研究了铜污染对紫花苜蓿的生物量、铜积累、叶绿素和游离脯氨酸含量等的影响,探讨叶绿素和游离脯氨酸含量与紫花苜蓿铜积累之间的相互关系.结果表明叶绿素和游离脯氨酸的含量变化分别与紫花苜蓿的生物量和铜积累量的变化趋势一致.随土壤中铜含量的增加,叶绿素含量先增加后减小.游离脯氨酸含量在外源添加铜含量高于10mg.kg-1时与对照组相比增加显著(P<0.05).紫花苜蓿根系的铜积累显著高于地上部分.铜含量为400mg.kg-1时紫花苜蓿铜的总积累量达每盆617μg,是对照组的12倍左右,表明紫花苜蓿对铜污染土壤具有潜在的...

关键词: 铜, 紫花苜蓿, 土壤, 生理响应, 富集, 植物修复

Abstract: Pot experiments were conducted to study how the Cu-contaminated soil affects the biomass, Cu accumulation, chlorophyll and free praline contents of alfalfa (Medicago sativa L.). Different Cu amounts were added into soil to form 10 Cu concentrations (l-400 mg·kg-1 soil) as contamination indices, according to the Chinese soil environment equality standard (CSEES). The relationship among chlorophyll, free praline and Cu enrichment in alfalfa was discussed. The results showed that the changes in chlorophyll contents and free proline contents are in line with that in biomass and Cu accumulation in alfalfa, respectively. Chlorophyll content increases with the increasing Cu concentration in soil and then decreases when Cu concentration is 30 mg·kg-1. The free praline content in alfalfa when the Cu addition is higher than 10 mg·kg-1 increases significantly in contrast with that in control tests(P &le 0.05). The Cu accumulation amount in alfalfa in the roots is significantly greater than that in its aboveground parts, and the total Cu enriched in alfalfa when Cu addition is 400 mg·kg-1 is up to 617 μg per pot, about 12 times as much as that in control tests. It reveals that alfalfa is indeed a potential plant for the phytoremediation of Cu-contaminated soil.

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