Comparative Study On Leaf Structure And Function Of Shrub In Sub-car With Road On The East University Road Of Nanning

Greening plants in urban traffic arteries are mainly used to separate traffic flow,prevent dust and reduce noise,beautify and improve urban environment.The east university road in Nanning city roads points seven garden shrubs planted on a vehicle as the research object,analyses the seven kinds of shrubs under local typical seasonal leaf structure,leaf function traits,leaf physiological,leaf dust 25 index differences,selecting related index analysis of seven kinds of shrubs on its response to plant environment,to understand the plants and the environment interaction accumulation of data,also provide the basis for road greening plant selection,reduce the plant maintenance and management cost,save the economic budget.The main conclusions of the experiment are as follows:?1?Eight leaf anatomical structure indicators showed significant differences among seven shrubs in summer and winter,while most of the indicators showed no significant differences among the same shrubs in summer and winter.Among the seven shrubs,only the Schefflera arboricola and Ficus microcarpa'Golden Leaves'have multiple epidermis structures,and the leaf structure shows that they are more favorable to cope with the relatively poor growth conditions such as the Sub-car with road.?2?Except for the non-significant differences of LPC among the seven shrubs in winter,the other five functional traits showed extremely significant differences in summer and winter.However,in the comparison of the same shrub in summer and winter,the SLA and LDMC indexes of the seven shrubs showed no significant differences.The Pittosporum pentandrum ability to obtain and preserve resources in seven kinds of shrubs was strong.?3?In nine leaf physiological indexes,seven kinds of shrubs in addition to no significant difference of SOD activity in summer and winter have significant relative water content,other indexes respectively in the summer and winter show is extremely significant difference,while the same shrub of the same physiological indexes in the summer,winter two season contrast,most have significant differences,different season has great influence to the physiological indexes.The ranking of the subordinate function found that among the seven shrubs,Hibiscus rosa-sinensis has the most advantageous leaf physiological characteristics,and the total amount of chlorophyll a,b and chlorophyll in the two seasons are the highest,which can make better use of light energy.?4?In leaf anatomical structure,functional properties and physiological characteristics of three types of index correlation analysis found that many have very significant or significant correlation between indicators,more focused on the negative relationship between the various indicators between leaf functional traits and blade structure,in the actual application according to the correlation of each section index targeted to provide a reference for forecast the change trend of related indicators;?6?The microstructure of leaf epidermis is closely related to the dust retention ability of plants.The analysis of three dust retention indexes of leaves shows that the morphology and density of epidermal fold bulking have a significant influence on dust retention ability.Among the seven shrubs,Duranta erecta'Golden Leaves'leaves have the most prominent retention ability of PM₁₀,PM_2.5.5 and dust.However,it is relatively low in the ranking of classification and membership function value of other indicators,so it should be considered in the maintenance situation while taking advantage of its advantages of dust retention.