| 藿香蓟(Ageratum conyzoides)对土壤铅胁迫的生理响应 |
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| 引用本文： | 刘碧英,潘远智,赵杨迪,蔡蕾,杨慧,侯艳,张建芳.藿香蓟(Ageratum conyzoides)对土壤铅胁迫的生理响应[J].应用与环境生物学报,2011(5):651-655. |
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| 作者姓名： | 刘碧英 潘远智 赵杨迪 蔡蕾 杨慧 侯艳 张建芳 |
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| 作者单位： | 四川农业大学风景园林学院; |
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| 基金项目： | 四川省重点公益性项目(No.2007NGY006); 四川省学术带头人培养基金(2007~2010)资助~~ |
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| 摘 要： | 为了解日益增加的城市土壤铅(Pb)胁迫对城市园林地被植物的影响,采用盆栽实验研究土壤Pb胁迫对藿香蓟(Ageratum conyzoides)叶片生理特性的影响.结果显示,Pb胁迫处理降低了藿香蓟叶片的叶绿素总量及叶绿素a和b含量,质膜透性增大,丙二醛(MDA)含量上升.随着Pb浓度增加,同一时期内藿香蓟叶片SOD、POD和CAT酶活性均上升,但土壤Pb浓度超过750 mg kg-1或1 000 mg kg-1后保护酶活性开始逐渐下降.随着胁迫处理时间的延长,SOD活性在d 20、d 40和d 60时都高于胁迫处理d 7时的活性,POD活性是在d 20时急剧下降,CAT活性则在胁迫处理d 60时急剧下降.研究表明,藿香蓟能在一定程度上适应土壤Pb胁迫,但Pb胁迫浓度超过750 mg kg-1后将影响其生理代谢过程.图4参20
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| 关 键 词： | 铅胁迫 藿香蓟 生理响应 SOD POD CAT |
Physiological Responses of Ageratum conyzoides to Lead Stress in Soil |
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| LIU Biying,PAN Yuanzhi,ZHAO Yangdi,CAI Lei,YANG Hui,HOU Yan & ZHANG Jianfang.Physiological Responses of Ageratum conyzoides to Lead Stress in Soil[J].Chinese Journal of Applied and Environmental Biology,2011(5):651-655. |
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| Authors: | LIU Biying PAN Yuanzhi ZHAO Yangdi CAI Lei YANG Hui HOU Yan & ZHANG Jianfang |
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| Institution: | LIU Biying,PAN Yuanzhi,ZHAO Yangdi,CAI Lei,YANG Hui,HOU Yan & ZHANG Jianfang(College of Landscape Architecture,Sichuan Agricultural University,Chengdu 611130,China) |
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| Abstract: | In order to understand the effects of increasing lead(Pb) contamination in soil on understory plant in urban forest,a pot experiment was conducted to study the physio-ecological effects of Pb stress in soil on the leaves of Ageratum conyzoides.All the treatments with different Pb concentrations decreased the concentrations of total chlorophyll and chlorophyll a and b,but increased the concentrations of cytomembrane permeability and malondialdehyde(MDA) in the leaves.The activities of superoxide dismutase(SO... |
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| Keywords: | lead stress Ageratum conyzoides physiological response SOD POD CAT |
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