土壤不同浓度铜对小飞蓬毒害及耐受性研究

应用生态学报 ›› 2005, Vol. 16 ›› Issue (4): 668-672.

土壤不同浓度铜对小飞蓬毒害及耐受性研究

丁佳红, 刘登义, 李征, 王广林

安徽师范大学生物多样性研究中心, 芜湖 241000

收稿日期:2004-04-12 修回日期:2004-10-04 出版日期:2005-04-15 发布日期:2005-04-15
通讯作者: 刘登义
基金资助:
安徽省自然科学基金项目(03043501)、安徽省教育厅自然科学基金重点项目(2000j1094zd)、安徽省教育厅自然科学基金(2002Kj156)和重要生物资源保护与利用研究安徽省重点实验专项基金资助项目.

Responses of Conyza canadensis to different concentrations of copper in soil

DING Jiahong, LIU Dengyi, LI Zheng, WANG Guanglin

Biodiversity Research Centre, Anhui Normal University, Wuhu 241000, China

Received:2004-04-12 Revised:2004-10-04 Online:2005-04-15 Published:2005-04-15

摘要/Abstract

摘要： 通过对高Cu污染区(Ⅰ)、低Cu污染区(Ⅱ)和非污染区(Ⅲ)小飞蓬盆栽实验及生理生化指标分析,结果表明,生态型Ⅰ、Ⅱ、Ⅲ电导率均随着Cu浓度增加而增大,并且两者之间呈极显著正相关;叶绿素(a+b)含量随着Cu浓度增加呈极显著负相关;生态型Ⅰ的蛋白质和脯氨酸含量随着Cu浓度增加均先有所升高,然后又降低,而生态型Ⅱ、Ⅲ则一直呈现降低趋势.3种生态型小飞蓬体内SOD、POD、CAT酶活性在Cu胁迫下均有所提高,与对照相比,当Cu浓度为1200mg·kg^-1时,生态型Ⅰ的SOD、POD、CAT活性分别为194.1%、206.2%、1186%;Ⅱ的SOD、POD、CAT活性分别为170.1%、182.9%、1113%;Ⅲ的SOD、POD、CAT的活性分别为115.1%、155.4%、10.73%.对3种生态型小飞蓬的生理生化指标及酶活性分析表明,高Cu污染区小飞蓬的耐受性要强于低Cu污染区,两者又均强于非污染区小飞蓬,这3种生态型小飞蓬的耐受性呈现出了明显的种间差异.

关键词: 小飞蓬, 耐受性, 重金属

Abstract: Through pot experiment and physiological-biochemical analysis,the study showed that the electric conductivities of Conyza canadensis collected from heavy Cu pollution (Ⅰ),light Cu pollution (Ⅱ) and control (Ⅲ) sites were enhanced,while the chlorophyll (a+b) contents were reduced with increasing Cu concentration.The protein and proline contents in Ⅰ were increased at first and then reduced,but those in Ⅱ and Ⅲ were reduced with increasing Cu concentration.The activities of SOD,POD and CAT were intensified under Cu stresses.When the Cu concentration was 1 200 mg·kg^-1,their activities in Ⅰ,Ⅱ and Ⅲ were increased 194.1%,206.2% and 118.6%,170.1%,182.9% and 111.3%,and 115.1%,155.4% and 107.3%,respectively,in comparing with the control,which illustrated that the tolerance of Conyza canadensis was in order of heavy Cu pollution site>light Cu pollution site >control site,and the three ecotypes showed distinct differences in tolerance.

Key words: Conyza canadensis, Tolerance, Heavy metal

中图分类号:

X171.5

丁佳红, 刘登义, 李征, 王广林. 土壤不同浓度铜对小飞蓬毒害及耐受性研究[J]. 应用生态学报, 2005, 16(4): 668-672.

DING Jiahong, LIU Dengyi, LI Zheng, WANG Guanglin . Responses of Conyza canadensis to different concentrations of copper in soil[J]. Chinese Journal of Applied Ecology, 2005, 16(4): 668-672.

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