甲醛胁迫对3种室内观赏植物的生理生化影响

Effects of formaldehyde stress on physiology and biochemistry of three ornamental plants

采用盆栽试验研究了甲醛胁迫后黄常山、短梗大参和袖珍椰子3种室内观赏植物叶片的生理生化指标变化,结果表明:甲醛胁迫后3种植物的生理生化指标与对照相比均有不同程度的变化。当甲醛浓度达到最高值288mg/m3时,与对照相比,黄常山叶片质膜相对透性升高64%,MDA含量升高178%,叶绿素含量降低51%,SOD与POD活性分别降低26%和55%;短梗大参叶片质膜相对透性升高10%,MDA含量升高19%,叶绿素含量降低43%,SOD与POD活性分别降低24%和25%;袖珍椰子叶片质膜相对透性升高9%,MDA含量降低24%,叶绿素含量降低30%,SOD与POD活性分别增加41%和36%。以生理生化指标的变化为基础,采用隶属函数法对3种植物的甲醛抗性进行综合评判,其抗性由强至弱为:袖珍椰子>短梗大参>黄常山。

The physiological and biochemical changes in leaves of 3 species of ornamental plants from Dichroa febrifuga,Macropanax rosthornii and Chamaedorea elegans under formaldehyde stress were studied in a pot experiment.The results indicated that,the physiological and biochemical indices of three ornamental plants showed different levels of changes compared with the control after formaldehyde stress.When the formaldehyde concentration reached a maximum value 288 mg/m3,the relative permeability of membrane increased by 64%,MDA content increased by 178%,but chlorophyll content decreased by 51%,and the activities of SOD and POD decreased by 26% and 55% respectively compared with that of control treatment in Dichroa febrifuga leaves;The relative permeability of membrane increased by 10%,MDA content increased by 19%,but chlorophyll content decreased by 43%,and the activities of SOD and POD decreased by 24% and 25% respectively in Macropanax rosthornii leaves;The relative permeability of membrane increased by 9%,the activities of SOD and POD increased by 41% and 36% respectively,but MDA content decreased by 24% and chlorophyll content decreased by 30% in Chamaedorea elegans leaves.By means of subordinate function method,the formaldehyde tolerance ability of three plants was arranged from strong to weak as Chamaedorea elegans,Macropanax rosthornii,Dichroa febrifuga.