摘要
以小麦、蒲公英、车前草、绿豆和空心菜幼苗为研究对象采用营养液水培方式利用玻璃密封箱进行甲醛的植物叶面吸收实验,探讨了5种植物对空气中甲醛的吸收、传输作用、净化能力及其生理响应。研究结果表明(1)5种植物均能吸收空气中甲醛,净化能力依次为小麦>蒲公英>车前草>绿豆>空心菜,实验条件下小麦苗的净化效率可达(371.39±17.59)mg/(h·kg FW);(2)车前草、绿豆和蒲公英能够将空气中的甲醛传输至根际溶液中,4 h内3种植物的传输效率分别为(63.08±10.7)、(57.14±9.10)和(197.90±19.12)μg/(h·kg FW)。但小麦和空心菜对空气中甲醛的传输能力较弱,根际溶液中未检测出甲醛;(3)甲醛胁迫对5种植物叶的POD酶活性变化影响不同,但暴露24 h后植物叶中POD酶活性均不低于空白,表现出较高的甲醛耐受性。
Foliar uptake and downward transport of airborne formaldehyde by five plants including water convolvulus,wheat,dandelion,green beans and plantain were investigated to explore the absorption of formaldehyde in air by the plants,transport of formaldehyde in plants and the physiological response of plants by measuring the POD activities.The investigation indicated that（1） airborne formaldehyde could be taken up by plants leaves and could enter into solution of rhizosphere via downward transport;the purification capacity of airborne formaldehyde,which all the five plants owned followed the descending order：wheat dandelion plantain green beans water convolvulus,and purification efficiency of wheat seedlings could reach（371.39±17.59） mg/（h·kg FW）.（2） It was found that formaldehyde could be detected in rhizosphere solutions of plantain,green beans and dandelion after exposure to formaldehyde in air for short time,and within4 h exposure time,the transport efficiencies of formaldehyde by plantain,green beans and dandelion from air to the rhizospyhere solutions were（63.08±10.7） μg/（h·kg FW）,（57.14＋9.10） μg/（h·kg FW） and（197.90±19.12） μg/（h·kg FW）,respectively.（3） The influences of formaldehyde press on POD activities of leaves of the five plants were different;POD activities in five plant leaves after 24-hour exposure to formaldehyde in air were not lower than those of the control ones,indicating the strong tolerances that the five plants possessed to formaldehyde in air..
出处
《环境科学与技术》
CAS
CSCD
北大核心
2017年第1期70-74,共5页
Environmental Science & Technology
基金
中国博士后科学基金(2014M552520)
新疆维吾尔自治区教育厅项目(XJEDU2013I07)
关键词
植物
甲醛
吸收
传输
POD
plants
formaldehyde
foliar uptake
transport
POD
