3种观叶植物对SO_2抗性能力的研究

Research on the SO_2 Resistance in Three Kinds of Foliage Plants

为研究不同种类植物对室内污染气体SO2的净化作用，以绿萝、常春藤、吊兰3种观叶植物为供试材料，采用人工熏气法研究了不同浓度SO2（0～80mg／m3）助迫条件下（3天），3种室内观叶植物丙二醛含量（MDA）、超氧化物歧化酶含量（SOD）、过氧化物酶（POD）和叶绿素含量（Chl）的变化情况。结果表明：随着SO2浓度的升高，3种观叶植物的叶片抗氧化酶活性及生理指标发生了不同程度的变化：绿萝、常春藤和吊兰MDA含量显著增加，其中常春藤上升幅度最大，吊兰次之，绿萝最小；常春藤和吊兰的SOD活性呈先上升后下降的趋势，绿萝的SOD活性显著下降；绿萝、常春藤和吊兰的POD活性呈先显著上升后下降趋势，在SO2浓度为60mg／m^3时分别达最大值1．58△OD47d（min·mg）、2．34△0D470／（min·mg）和0．07A034，d（min·mg），其中吊兰增加幅度最小，常春藤增加的幅度最大；绿萝、常春藤和吊兰Chl含量显著下降，常春藤下降幅度最大，其次是吊兰，绿萝最小。

The purification effect of 3 important landscaping plants, green dill, ivy and chlorophytum, on contaminant gas SO2 was studied. The contents of malondialdehyde （MDA）, superoxide dismutase （SOD）, peroxidase （POD） and chlorophyll （Chl） in these plants under fumigation with SO2 of different concentration were analyzed. The results showed that the activity of these antioxidase and physiological indices changed differently with an increasing in concentration of SO2. The MDA in these plants increased significantly, with ivy the highest and green dill the lowest. The SOD in ivy and chlorophytum exhibited an increase followed by a decrease, while the SOD in green dill decreased significantly. The POD in all plants increased and then decreased significantly; the maximum concentrations of POD under a SO2 gas 60 mg/m3 was 1.58, 2.34 and 0.07 △ OD470/（min · mg） for green dill, ivy and chlorophytum, respectively. Content of Chl decreased significantly with ivy showing the largest effect and green dill showing the smallest effect.