摘要
以果灰藓和丛本藓为材料,采用室内模拟培养、生理生化测定等实验手段,研究了铜胁迫对这两种苔藓植物生理生化特性的影响。结果表明,在Cu2+的作用下,果灰藓和丛本藓体内与逆境密切相关的物质和保护酶发生一系列的变化,且表现出明显的剂量效应关系和时间效应关系。随着处理浓度的加大和处理时间的延长,叶绿素含量和过氧化物酶活性呈现先上升后下降的趋势;游离脯氨酸含量和丙二醛含量呈现逐渐升高的趋势。对比两种苔藓植物发现,果灰藓体内生理指标的变化较丛本藓的明显,说明果灰藓对铜胁迫反应较敏感,有利于监测重金属铜污染。
Experiment was carried out on influence of copper stress on physiological and biochemical characteristics of Hypnum fertile and Anoectangium aestivum by indoor simulated culture. The results indicated that under the stress of copper, protective enzymes and elements closely related to the adversity of H. fertile and An. aestivum changed with evident relation of dosage/efficiency and duration/efficiency. Chlorophyll content and the activity of peroxidase （POD） increased first then decreased with the increase of concentration and duration of stress, while proline（Pro） content and malondialdehyde （MDA） content increased continually. Changes of physiological indexes of H. fertile were more evident under stress of copper compared with that of An. Aestivum, meaning that H. fertile was more sensitive to copper stress, and could be indicator for copper pollution.
出处
《浙江林业科技》
北大核心
2008年第6期24-27,共4页
Journal of Zhejiang Forestry Science and Technology
关键词
铜胁迫
苔藓植物
生理生化指标
copper stress
bryophyte
physiological and biochemical indexes
