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OALib Journal期刊
ISSN: 2333-9721
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水体阿特拉津残留对千屈菜的毒性效应
DOI: 10.3724/SP.J.1145.2011.00814, PP. 814-818
Keywords: 阿特拉津,千屈菜,挺水植物,生物量,pod,mda,植物毒性
Abstract:
为向水体污染的植物修复技术提供依据，采用营养液水培法研究5个阿特拉津浓度（1、2、4、8和16mgl-1）下千屈菜鲜重增量、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差异.结果表明，阿特拉津胁迫下，千屈菜在实验浓度范围内均可存活和生长；但鲜重增量、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.阿特拉津浓度越高，其对千屈菜的毒性越高.1mgl-1处理下，除pod活性外植物其他生长和生理指标均与空白对照无显著差异；但16mgl-1处理下，鲜重增量、mda含量和pod活性则显著低于正常水平.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.千屈菜对低浓度阿特拉津（≤1mgl-1）具有较高耐受性.图2表1参31
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