匍茎翦股颖对Cu2+、Zn2+、Cd2+与Pb2+
胁迫的生长响应与阈限浓度

赵树兰; 多立安<sup>*</sup>

引用本文:	赵树兰, 多立安.匍茎翦股颖对Cu²⁺、Zn²⁺、Cd²⁺与Pb²⁺ 胁迫的生长响应与阈限浓度[J].广西植物,2008,(1):100-106.[点击复制]
	ZHAO Shu-Lan, DUO Li-An.Growth response and threshold concentration of Agrostis stolonifera to Cu²⁺,Zn²⁺,Cd²⁺or Pb²⁺ stress[J].Guihaia,2008,(1):100-106.[点击复制]

【打印本页】【下载PDF全文】【查看/发表评论】【下载PDF阅读器】【关闭】

←前一篇|后一篇→

过刊浏览高级检索

本文已被：浏览 5545次下载 2006次	码上扫一扫！
分享到：微信更多字体:加大+\|默认\|缩小-
匍茎翦股颖对Cu²⁺、Zn²⁺、Cd²⁺与Pb²⁺ 胁迫的生长响应与阈限浓度
赵树兰, 多立安^*
天津师范大学化学与生命科学学院, 天津 300387

摘要:

采用砂培法,研究了匍茎翦股颖对Cu²⁺、Zn²⁺、Cd²⁺与Pb²⁺胁迫的生长响应及阈限浓度,结果表明:种子萌发率随着4种重金属浓度的增加而下降。对株高的影响是当重金属浓度小于100 mg/L时会促进株高生长,高于100 mg/L则产生抑制作用。Cu²⁺显著抑制根系生长,并随浓度的增加抑制效应愈加显著; 在Cu²⁺浓度为600 mg/L时匍茎翦股颖的根长比对照下降了93.75%。Cu²⁺、Zn²⁺、Pb²⁺浓度小于200 mg/L时会促进地上生物量的增加,但高于200 mg/L时,地上生物量会随着3种重金属的增加而减少。Cu²⁺、Zn²⁺浓度小于100 mg/L或Cd²⁺、Pb²⁺浓度小于200 mg/L会增加叶绿素的含量,高浓度会降低叶绿素的含量; Cd²⁺在浓度为600 mg/L时显著降低叶绿素含量,与对照相比,下降了43.55%。匍茎翦股颖生长的综合效应分析表明,匍茎翦股颖对Cu²⁺胁迫最敏感,具有较低的阈限浓度,而Zn²⁺胁迫对匍茎翦股颖的生长影响最小,阈限浓度相对较高。

关键词: 重金属胁迫匍茎翦股颖生长响应阈限浓度

DOI：

分类号:Q948.116

基金项目:

Growth response and threshold concentration of Agrostis stolonifera to Cu²⁺,Zn²⁺,Cd²⁺or Pb²⁺ stress

ZHAO Shu-Lan, DUO Li-An^*

College of Chemistry and Life Sciences, Tianjin Normal University, Tianjin 300387, China College of Chemistry and Life Sciences, Tianjin Normal University, Tianjin 300387, China

Abstract:

By sand cultural method,the experiment was conducted to investigate growth response and threshold concentration of Agrostis stolonifera to Cu²⁺,Zn²⁺,Cd²⁺ or Pb²⁺ stress. It was found that rate of seed germination decreased with increasing supply of Cu²⁺,Zn²⁺,Cd²⁺ or Pb²⁺. Heavy metal supply at concentration ≤100 mg/L increased plant height of A.stolonifera,whereas Cu²⁺,Zn²⁺,Cd²⁺or Pb²⁺supply higher than 100 mg/L decreased plant height. Cu²⁺ inhibited root growth significantly,and root length decreased with increasing Cu²⁺ supply. Compared with the control,root length of A.stolonifera was lowered by 93.75% at Cu²⁺ concentration of 600 mg/L. Aboveground biomass increased at Cu²⁺,Zn²⁺ or Pb²⁺ concentration ≤200 mg/L,but decreased with increasing concentrations when their concentrations were higher than 200 mg/L. Chlorophyll content increased at Cu²⁺,Zn²⁺ concentration ≤100 mg/L or Cd²⁺,Pb²⁺ concentration ≤200 mg/L,but tended to decrease at Cu²⁺,Zn²⁺ concentration ≥100 mg/L or Cd²⁺,Pb²⁺ concentration ≥200 mg/L. Only Cd²⁺ significantly lowered chlorophyll content of A.stolonifera by 43.55% at concentration of 600 mg/L. Synthetical effect of heavy metal on A.stolonifera growth indicated that A.stolonifera was most sensitive to Cu²⁺ stress with low threshold,but the effect of Zn²⁺ stress on A.stolonifera growth was the least.

Key words: heavy metal stress Agrostis stolonifera growth response threshold concentration