绿萝对香烟烟雾的净化与生理响应

为了研究室内观赏植物绿萝(Epipremnum aureum)对香烟烟雾的净化能力及其生长生理响应，从而为香烟烟雾污染防控提供依据，本研究模拟人的吸烟方式，在长、宽、高均为60 cm，密闭或间隔通风的玻璃装置中注入2支香烟，放置绿萝。监测72 h内CO和PM2.5浓度变化，观察植物的表型变化，测定植物叶片生理指标变化。结果表明，绿萝可有效吸收或吸附香烟烟雾产生的CO和PM2.5，净化空气；香烟烟雾处理对植物生长产生了一定的影响，叶片出现水渍状斑块，随时间延长，整叶发黄；植物叶片活性氧（超氧阴离子和过氧化氢）水平显著增加，造成膜脂过氧化加剧，其产物丙二醛含量显著增加；植物启动抗氧化酶系统及时清除活性氧；随胁迫时间延长，抗性减弱。通风可有效加速空气流动，减轻香烟烟雾对植物的伤害。因此，建议在吸烟区摆放绿萝并时常通风，可有效降低香烟烟雾污染带来的风险。

Purification and Physiological Responses of Epipremnum aureum on Cigarette Smoke

To investigate the purification capacity of indoor ornamental plant Epipremnum aureum on cigarette smoke and its growth and physiological responses, and provide a basis for prevention and control of cigarette smoke pollution, cigarette smoking way of mankind was imitated in this study, two cigarettes were injected into a sealed or interval ventilated glass capsule with length, width and height all of 60 cm, and Epipremnum aureum was put into the capsule. CO and PM2.5 concentrations during 72 h were measured, changes of phenotypes were observed and the physiological indexes in leaves were determined. The results showed that: E. aureum could effectively absorb CO and PM2.5 produced by cigarette smoke and purify the air. Plant growth was affected by cigarette smoke treatments to some degree. Watery plaque spots were appeared in leaves and the whole leaves became yellow with the time prolonging. Levels of reactive oxygen species (including superoxide anion and hydrogen peroxide) in leaves were significantly increased, resulting in aggravation of membrane lipid peroxidation and the increase of malondialdehyde content. The plant triggered antioxidant enzymes system to eliminate reactive oxygen species in time; while, as the time went on, the resistance became weakened. Ventilation effectively accelerated air flow and alleviated the cigarette smoke toxicity to plants. Therefore, we suggest E. aureum should be put in smoking area and ventilating sometimes, thus it will decrease the risk caused by cigarette smoke pollution.