Study On The Resistance Mechanism Of Indoor Plants To The Compound Pollution Of Benzene And Formaldehyde

The problem of indoor air environment is becoming more and more prominent today.There are many kinds of indoor air pollutants.The chemical pollution mainly combined with benzene and formaldehyde is seriously harmful to human health.It is called indoor "invisible killer".Indoor plants have a continuous,stable and efficient effect on purifying combined pollution of benzene and formaldehyde.At the same time,it has some advantages such as environmental,economical and so on,and plays an important role in indoor chemical pollution treatment.Sansevieriatrifasciata and Spathiphyllum",the common indoor plants,are selected in this studywhich has the strong resistant ability to benzene or formaldehyde pollution,with artificial fumigation experiments for analysis of indoor plant physiological and biochemical index changes before and after the stress,through variance analysis and subordinate function value method and other analysis methods,study the resistance ability of indoor plants under different modes of benzene and formaldehyde stress;The plants that have strong resistance to benzene and formaldehyde pollution stress were selected,and the resistance mechanism of indoor plants to compound pollution of benzene and formaldehyde was revealed and analyzed from physiological level by principal component analysis and correlation analysis of physiological and biochemical indexes.The results of the study show that:1.Comparative study on resistance ability of indoor plants to benzene and formaldehyde pollution(1)Under different ways and different concentrations of benzene and formaldehyde pollution stress,the contents of MDA and soluble protein,the production rate of O2-,the activity of POD and APX of experimental plants were increased;the contents of Chl and soluble sugar were decreased;The changes of Chl,MDA,APX activity,production rate of O2.-,and the content of soluble protein of Sansevieria trifasciata are less than Spathiphyllum’s;The changes of POD activity of Sansevieria trifasciata under the single benzene pollution is less than the Spathiphyllum’s,The changes of POD activity of Sansevieria trifasciata under the compound pollution(except F6)is less than the Spathiphyllurm’s,The changes of POD activity and the content of soluble sugar of Sansevieria trifasciata under and the single formaldehyde pollution is more than the Spathiphyllum’s.(2)According on the result of the resistance ability of the experimental plants to benzene and formaldehyde pollution evaluate by the subordinate function value method,the resistance of Sansevieria trifasciata to benzene and formaldehyde pollution is stronger than spathiphyllum’s in any situation.2.Study on resistance mechanism of indoor plants to the compound pollution of benzene and formaldehyde(1)According to the principal component analysis and correlation analysis’s result of the experimental plant’s physiological and biochemical indexes under the compound pollution of benzene and formaldehyde,the content of soluble sugar,MDA,the activity of APX,the content of soluble protein and the production rate of O2-are the main resistance index to reflect resistant mechanism of the experimental plant to the compound pollution of benzene and formaldehyde,the content of soluble sugar is the most important resistance index;the content of soluble sugar,MDA,the activity of APX,the content of soluble protein and the production rate of O2-have the significant correlation at 0.01 level.(2)The result of the principal component analysis and correlation analysis shows that:indoor plants under combined pollution of benzene and formaldehyde,O2-generation rate increased,breaking the plant active oxygen free radicals and eliminate the balance,resulting in plant active oxygen free radicals cause irreversible excessive accumulation of persecution on the plant cell membrane system,plant metabolism and normal life activities have been seriously affected.Indoor plants of benzene and formaldehyde compound pollution resistant mechanism to open,increasing APX on antioxidant enzyme activity of excessive accumulation of active oxygen free radical cleaning;increase the content of soluble protein and other biological macromolecules,repair of cell permeability regulation and cell membrane system,promote plant life activities and enhanced resistance ability to the stress.(3)When the resistance mechanism of indoor plants to compound pollution of benzene and formaldehyde is working,the soluble sugar content is significantly reduced,on one hand the soluble sugar to provide energy and materials for resistant physiological activities,on the other hand,soluble sugar is likely to act as a signal substances in the indoor plant’s resistant mechanism to compound pollution of benzene and formaldehyde,is involved in the regulation of metabolism and activities of plants intracellular signal to enhance the resistance ability of plants to the stress.The role of soluble sugar in plant resistance mechanism needs further study.