7种观赏植物对甲醛的净化效果及生理响应

为净化室内甲醛污染筛选出净化能力强的植物种类，以7种常见室内观赏植物为试材，采用气体密封舱熏气法，进行甲醛熏气处理，以净吸收率及单位叶面积甲醛减少量来比较植物吸收甲醛能力的大小，同时测定了熏气前后植物叶片的相对电导率、丙二醛含量及POD活性等指标。结果显示，被测植物在一定程度上均可以有效吸收甲醛，单位面积吸收量从大到小依次为椒草、吉祥草、一叶兰、燕子掌、紫背竹芋、锦巢凤梨、一品红。不同植物在甲醛熏气后表现出不同程度的受害反应和生理生化指标的变化，综合分析结果表明椒草、吉祥草、一叶兰、燕子掌、紫背竹芋、锦巢凤梨等对甲醛的综合净化能力和抗性较好。

The Capacity on Purifying Indoor Formaldehyde Pollution and Physiology Response of 7 Ornamental Plants

To select suitable plants for use in purified indoor formaldehyde pollution, Seven species of ornamental plants were evaluated for their effectiveness in reducing formaldehyde concentrations in a simulated fumigating box environment, and the absorption capacities were compared and ranked according to the net ratio of absorption and the reduction of formaldehyde in the unit leaf area. Meanwhile, the leaf plasma membrane permeability, MDA content and POD activity were measured to assess those plants’ physiological responses to formaldehyde stress. The results indicated that the capacities of different plants in removing formaldehyde were different, and the order of the plants according to the absorption efficiency amount per unit of leaf area was Peperomia tetraphylla > Reineckea carnea > Aspidistra elatior > Crassula portulacea > Stromanthe sanguinea > Nidularium fulgens . The leaf relative conductivity, MDA content and POD activity of all the seven species changed after formaldehyde treatment and the resistances of different species to formaldehyde stress were different. According to formaldehyde removal capacity and the resistance measured in the experiment, 6 ornamental plants (including Peperomia tetraphylla、Reineckea carnea、Aspidistra elatior、Crassula portulacea、Stromanthe sanguine、Nidularium fulgens)had both higher removal capacities and higher resistance that were suitable to be used in indoor decoration.