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

The demand for material life and spiritual enjoyment has increased with the development of society.In the third pollution period,indoor chemical pollution period,how to remove indoor chemical pollution safely and effectively has become an urgent issue in current research.The ecological restoration technology of indoor plants chemical pollution has the advantages of safety,economy,beauty and sustainability,and the plant samples are simple and easy to obtain,and can eliminate indoor chemical pollution without any equipment,and not limited by any conditions such as time,location,climate,etc.On the other hand,the long-term and stable growth of the plant ensures long-term repair of chemical pollution indoors.It is an important way to repair the indoor living environment by studying the resistance mechanism of indoor overhanging plants to indoor chemical pollution and screening indoor hanging plants with strong resistance.Eight common indoor overhanging plants were selected as experimental materials.Three kinds of different concentration gradients of formaldehyde and benzene were used to study the pollution stress with artificial fumigation experiments.The membership function value method and variance analysis method were used to study the indoors.The changes of physiological and biochemical indexes of the overhanging plants after stress,and thus the comprehensive evaluation of resistance.Then,the mechanism of resistance to plants with strong resistance to formaldehyde and benzene was selected.The correlation analysis and principal component analysis were used to study the mechanism of resistance of indoor suspension plants to formaldehyde and benzene.The results of the study show that:1.Study on the resistance ability of indoor overhanging plants to compound pollution of formaldehyde and benzene?1?The changes of experimental plant species,the stress concentration and interaction between the two had significant effects on chlorophyll content,MDA content,production rate of·O₂^-,soluble sugar content,soluble protein content and POD activity.And the effect of stress concentration on is more significant.?2?The chlorophyll content and soluble sugar content decreased under the sterss of different concentration gradients of the formaldehyde,and benzene compound pollution,and MDA content,production rate of·O₂^-,soluble protein content and POD activity increased.?1?Under different concentrations of the compound pollution of formaldehyde and benzene,the rate of change of physiological and biochemical indexes of Hedera nepalensis was lower than that of other plants,showing the strongest resistance to the compound pollution of formaldehyde and benzene.And the resistance of Tradescantia zebrine and Chlorophytum comosum variegatum hort is relatively weakest.?2?Through the membership function value method,it can be concluded that the comprehensive order of the resistance of the 8 kinds of indoor overhanging plants to formaldehyde and benzene complex pollution from strong to weak is as list:Hedera nepalensis?X1?>Chlorophytum comosum var.Mediopictum?X5?>Chlorophytum comosum var.mediopictum hort?X8?>Chlorophytum capense var.Variegatum?X7?>Chlorophytum comosum?X6?>Scindapsus aureus?X3?>Chlorophytum comosum variegatum hort?X4?>Tradescantia zebrine?X2?.2.Study on resistance mechanism of indoor overhanging plants to compound pollution of formaldehyde and benzene?1?Correlation analysis of physiological and biochemical indexes ofcompound pollution of formaldehyde and benzene in indoor overhanging plants showed that the correlation between physiological and biochemical indicators was strong.There is a significant correlation between MDA and soluble protein content at the 0.05 level,and it is highly negatively correlated.MDA content is highly positively correlated with POD activity and moderately negatively correlated with soluble sugar content.There is a high positive correlation between chlorophyll content and POD activity and MDA content,and a high negative correlation with soluble protein content.Soluble sugar content is moderately positively correlated with soluble protein content,moderately negatively correlated with POD activity,and moderately negatively correlated with soluble protein content and POD activity.?2?Principal component analysis of the physiological and biochemical indexes of formaldehyde and benzene in the hanging plants showed that the chlorophyll content,MDA content,superoxide anion radical production rate and POD activity were all greater than 0.9under the corresponding principal components,which was indoor drape.The main stress resistance index of plants under the combined pollution stress of formaldehyde and benzene.?3?Study on the resistance mechanism of indoor overhangding plants to the compound pollution of formaldehyde and benzene?1?Under the combined pollution of formaldehyde and benzene,the stability of reactive oxygen species in plant cells is broken.The accumulation of superoxide anion radicals causes the membrane system in plants to be destroyed.Membrane peroxidation leads to MDA.The increase in content further aggravates the overall stability of cell membrane,cell membrane permeability and fluidity,and affects the normal physiological metabolism of plants.Chloroplasts affect the production of chlorophyll due to the destruction of the membrane system,the chlorophyll content in plants decreases,and photosynthesis is blocked.?2?The self-regulating system of the plant begins to function,and the POD activity is enhanced to remove excess accumulated reactive oxygen species and restore the normal physiological metabolism of the plant;the soluble protein content is increased to regulate the osmotic pressure,and the soluble sugar content is decreased.The synthesis of inverse-related proteins provides a carbon source and participates in intracellular signaling,improving plant resistance.