苯污染胁迫下室内植物POD活性与MDA含量变化分析研究

摘要

当今环境污染问题愈加严峻,现代社会正处在以“室内化学污染”为标志的第三污染期.室内植物对室内苯污染具有吸收净化作用,对苯胁迫的抗性能力是决定植物是否能够长期在污染环境中正常生长发育并持续、有效发挥吸污能力的前提和基础.过氧化物酶(POD)活性和丙二醛(MDA)含量指标能够有效反映植物对室内苯污染胁迫抗性能力强弱.文章采用人工熏气实验,研究9种常见室内植物在不同浓度苯胁迫下的POD活性和MDA含量变化,评定不同植物在苯胁迫下的抗性能力.综合评定得出:9种常见室内耐阴观叶植物中,金边虎尾兰对苯污染胁迫的抗性能力最强,其次为鸟巢蕨,对苯污染胁迫抗性能力最弱的为皱叶薄荷.%Nowadays,the problem of environmental pollution is becoming more and more serious.Modem society is in the third pollution period marked by "indoor chemical pollution".Indoor plants have an effect on the absorption and purification of indoor benzene pollution,and the resistance of benzene stress is basis and premise of whether plants can keep long-term normal growth and development and play the continuous and effective role in absorbing pollution in polluted environment.Peroxidase (POD) activity and malondialdehyde (MDA) content can effectively reflect the resistance ability of plants to indoor benzene pollution stress.In this paper,the changes of peroxidase (POD) activity and malondialdehyde content of 9 common indoor shade tolerant plants under different concentrations of benzene stress are studied by artificial fumigation method.The physiological indexes of Sansevieriatrifasciatavar.laurentii has the strongest resistance to benzene pollution,followed by Neottopteris antique,and the weakest is Melissa officinalis.