植物生态学报 ›› 2011, Vol. 35 ›› Issue (2): 223-231.DOI: 10.3724/SP.J.1258.2011.00223

• 研究论文 • 上一篇    下一篇

水体阿特拉津残留对水葱生物量及生理特性的影响

王庆海1,*(), 张威1,2, 却晓娥3, 武菊英1, 张国安2, 肖波1   

  1. 1北京市农林科学院北京草业与环境研究发展中心, 北京 100097
    2华中农业大学植物科学技术学院, 武汉 430070
    3中国林业科学研究院荒漠化研究所, 北京 100091
  • 收稿日期:2010-03-22 接受日期:2010-11-16 出版日期:2011-03-22 发布日期:2011-01-21
  • 作者简介:王庆海, E-mail: qinghaiw@sina.com

Effects of atrazine residue in water on biomass and physiological characteristics of Scirpus tabernaemontani

WANG Qing-Hai1,*(), ZHANG Wei1,2, QUE Xiao-E3, WU Ju-Ying1, ZHANG Guo-An2, XIAO Bo1   

  1. 1Beijing Research and Development Center for Grass and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
    2College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
    3Institute of Desertification Studies of Chinese Academy of Forestry, Beijing 100091, China
  • Received:2010-03-22 Accepted:2010-11-16 Online:2011-03-22 Published:2011-01-21

摘要:

利用营养液水培法, 研究了5个阿特拉津(atrazine)浓度(1、2、4、8和16 mg·L-1)下水葱(Scirpus tabernaemontani)鲜重、叶片相对含水量(RWC)、丙二醛(MDA)含量、过氧化物酶(POD)活性、根系活力和叶绿素含量等的变化。结果表明, 水葱在阿特拉津胁迫下, 鲜重、RWC、叶绿素含量均有不同程度的下降, 根系活力和POD活性降低, 同时MDA含量上升, 膜脂过氧化程度加剧。由于阿特拉津的降解, 这种不良影响随处理时间的延长而减弱。但其对叶绿素含量的影响具持久性; 培养60天内, 叶绿素含量仍显著低于正常水平。阿特拉津浓度越高, 对水葱的植物毒性越高, 当浓度高于8 mg·L-1时, 水葱的生长和生理活动受到显著影响(p < 0.05); 低于1 mg·L-1时, 与对照无显著差异。

关键词: 阿特拉津, 生物量, 生理特性, 水葱

Abstract:

Aims Our objective was to assess the phytotoxicity of atrazine residue in water on the emergent aquatic plant Scirpus tabernaemontani.
Methods We conducted hydroponics experiments to study the effects of atrazine stress on peroxidase (POD) and root activities, malonaldehyde (MDA) and chlorophyll contents, relative water content (RWC) of leaf and fresh weight of S. tabernaemontani. The original dosages of atrazine in the culture solution based on Hoagland solution were 1, 2, 4, 8 and 16 mg·L-1. Plant samples were collected 15, 30, 45 and 60 days after the onset of the experiment.
Important findings POD and root activities, chlorophyll content, RWC and fresh weight of S. tabernaemontani decreased, and MDA contents increased. All results indicated that elevated concentration of atrazine (>8 mg·L-1) has significant effects on biomass and physiological characteristics of S. tabernaemontani. With the exception of chlorophyll contents, the harmful effects weakened with prolonged treatment exposure due to degradation of atrazine. There were no significant differences in investigated variables between the 1 mg·L -1 atrazine treatment and the control during the growing season.

Key words: atrazine, biomass, physiological characteristic, Scirpus tabernaemontani