H_2S对三种空气净化植物保护酶活性的影响

The Influence of H_2S on the Activities of Protective Enzyme of Three Air Purification Plants

以绿萝(Scindapsus aureun)、常春藤(Hedera nepalensis K,Koch var.sin ensis)、吊兰(Chlorophytum)三种植物种为材料,通过密闭箱静态熏气方法,H2S处理浓度为0μmol.L-1、10μmol.L-1、20μmol.L-1、30μmol.L-1、40μmol.L-1,胁迫3d后,测定其叶绿素含量,丙二醛(MDA)含量,超氧化物歧化酶(SOD)活性,过氧化物酶(POD)活性。结果表明:在H2S的胁迫下,三种植物的叶绿素相对含量均下降,但丙二醛呈上升的趋势;绿萝的SOD活性在30μmol﹒L-1时开始下降,常春藤和吊兰的SOD活性均呈上升的趋势;POD的活性都呈先上升再下降的趋势,而且均在30μmol.L-1时达到阈值。综合分析,3种植物的抗H2S胁迫以吊兰最强,绿萝次之,常春藤最差。

In this experiment, Bunting, Ivy and Chlorophytum comosum were used as materials, which was put into different concentrations of H2 S （ 0μmoL/L, 10μmoL/L, 20μmoL/L, 30μmol/L and 40μmol/L ） in a closed culture for three days. Then, some samples were chosen to determine the content of chlorophyll and MDA as well as the activities of SOD and POD. The results showed that the relative contents of chlorophyll in three plants decreased with the increase of concentration of H2 S, while the contents of MDA increased, and the SOD activity of Bunting increased first, then decreased, and had the maximum value at 30μmoL/L. The SOD activity of Ivy and Chlorophytum comosum showed an increasing tendency. The POD activity of all plants increased first, then decreased, and had the maximum value at 30μmol/L. According to the results. It can be concluded that H2S stress resistance of three plants was decreased in the order of braeketplant, Bunting and Ivy.