香根草对重金属铅离子的胁迫反应研究

应用生态学报 ›› 2005, Vol. 16 ›› Issue (11): 2178-2181.

香根草对重金属铅离子的胁迫反应研究

韩露, 张小平, 刘必融

安徽师范大学生命科学学院安徽省重要生物资源保护与利用研究重点实验室, 芜湖 241000

收稿日期:2005-03-07 修回日期:2005-06-20 出版日期:2005-11-15 发布日期:2005-11-15
通讯作者: 韩露,女,1979生,硕士研究生.主要从事植物生态学研究,发表论文3篇,Tel:13721039509;E-mail:hanluer04@163.com
基金资助:
国家自然科学基金项目(49871078)、安徽省教育厅自然科学基金项目(2003kj149)和安徽省重要生物资源保护与利用研究重点实验室基金资助项目.

Response of Vetiveria zizanioides to Pb²⁺ stress

HAN Lu, ZHANG Xiaoping, LIU Birong

Province Key Laboratory of Biological Resources Conservation and Utilization, College of Life Science, Anhui Normal University, Wuhu 241000, China

Received:2005-03-07 Revised:2005-06-20 Online:2005-11-15 Published:2005-11-15

摘要/Abstract

摘要： 研究了Pb2+对香根草生理生态指标的影响.结果表明,随水培液中Pb2+浓度的增加(0～8 mmol·L^-1),香根草苗的生长受到严重影响;叶片电导率增大;SOD活性先上升后下降,但均高于对照,其活性与pb²⁺浓度呈正相关;POD和CAT活性虽也是先上升后下降,但在高浓度(＞ mmol·L^-1)的pb²⁺处理下,酶活性均低于对照,其酶活性与pb²⁺浓度呈显著负相关.可以认为,酶活性升高是由于香根草苗对pb²⁺胁迫做出的应激反应,而高浓度Pb²⁺却对香根草苗的保护酶活性有抑制作用.

关键词: 香根草, 无菌苗, pb²⁺, 胁迫

Abstract: The study on the eco-physiological indices of V.zizanioides under Pb²⁺ stress showed that with the increase of Pb²⁺ concentration(0～8 mmol·L^-1) in water culture,the growth of V.zizanioides seedlings was badly influenced.Their leaves'conductivity increased,while SOD activity increased first and decreased then,but still higher than control.There was a positive correlation between SOD activity and Pb²⁺ concentration.POD and CAT activities were also increased first and decreased then,but when the Pb²⁺ concentration was>4 mmol·L^-1,these enzyme activities were lower than the control,and had a significantly negative correlation with Pb²⁺ concentration.It was considered that the increase of enzyme activities was resulted from the adaptability of V.zizanioides stressed by Pb²⁺,while high concentration Pb²⁺ had an inhibitory effect on enzyme activities.

Key words: Vetiveria zizanioides, Aseptic seedlings, Pb²⁺ stress

中图分类号:

Q945.78

韩露, 张小平, 刘必融. 香根草对重金属铅离子的胁迫反应研究[J]. 应用生态学报, 2005, 16(11): 2178-2181.

HAN Lu, ZHANG Xiaoping, LIU Birong . Response of Vetiveria zizanioides to Pb²⁺ stress[J]. Chinese Journal of Applied Ecology, 2005, 16(11): 2178-2181.

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