Studies And On Several Physiological Indexes Of The Drought-resistance Of Nine Species Of Gardening Trees And Comprehensive Evaluation

Select nine species of Gardening Trees ,Fraxinus chinensisRoxb.、Ligustrum×vicaryi、Berberis thunbergii‘atropurpurea’、Euonymus japonicus、Platanus×acerifolia、Acer elegantulum、Koelreuteria paniculata、Firmiana simplex and Buxus microphyllasubsp. Sinica.Determination of natural environment on the growthof these 9 kinds of gardening trees in 6 physiological indexes forDrought-resistance. Finally, use the fuzzy subordinate functionanalysis method to give the Comprehensive evaluation. The mainresults are follow:In nature conditions, nine kinds of garden trees leaf relativewater content due toprecipitation changes show the correspondingtrend. Sort by tissue water content: Ligustrum×vicaryi＞Berberisthunbergii‘atropurpurea’＞Euonymus japonicus＞Buxus microphyllasubsp. sinica＞Platanus×acerifolia＞Koelreuteria paniculata＞Firmiana simplex＞Fraxinus chinensis Roxb.＞Acer elegantulum.Sort by changes in tissue water content range: Acer elegantulum＞Koelreuteria paniculata＞Fraxinus chinensis Roxb.＞Firmianasimplex＞Platanus×acerifolia＞Buxus microphylla subsp. sinica＞Berberis thunbergii‘atropurpurea’＞Ligustrum×vicaryi＞Euonymusjaponicus.Changes in amplitude of which Acer elegantulum is the largest,Euonymus japonicus change is the smallest.Nine kinds ofgarden plants in leaf water saturation deficit showing a gradualchange,sort by changes in amplitude of the water saturation deficit:Platanus×acerifolia＞Koelreuteria paniculata＞Firmiana simplex＞Acer elegantulum＞Buxus microphylla subsp. sinica＞Ligustrum×vicaryi＞Berberis thunbergii‘atropurpurea’＞Fraxinus chinensisRoxb.＞Euonymus japonicus.In natural conditions,the cell membrane permeability changes inrange of nine kinds of garden trees.Sort by cell membranepermeability: Fraxinus chinensis Roxb.＞Acer elegantulum＞Ligustrum×vicaryi＞Euonymus japonicus＞Firmiana simplex＞Buxus microphylla subsp. sinica＞Berberis thunbergii‘atropurpurea’＞Platanus×acerifolia＞Koelreuteria paniculata. Sort by cellmembrane permeability changes inamplitude: Fraxinus chinensisRoxb.＞Buxus microphylla subsp. sinica＞Acer elegantulum＞Berberis thunbergii‘atropurpurea’＞Platanus×acerifolia＞Euonymus japonicus＞Firmiana simplex＞Ligustrum×vicaryi＞Koelreuteria paniculata.The conductivity change is Fraxinuschinensis Roxb.,Followed by Acer elegantulum.This indicator in theconductivity,no significant difference between garden shrubs andgarden arbor.In natural conditions, four samples measured total chlorophyllcontent apart from Buxus microphylla subsp. sinica , the other eightkinds of garden trees showed increased and then decreased thechanges, garden shrubs in chlorophyll content measured slightlylower than the trees. Sort by chlorophyll content: Buxus microphyllasubsp. sinica＞Platanus×acerifolia＞Firmiana simplex＞Koelreuteria paniculata＞Euonymus japonicus＞Fraxinus chinensis Roxb.＞Acerelegantulum＞Ligustrum×vicaryi＞Berberis thunbergii‘atropurpurea’.Sort by changes in rate of chlorophyll content:Euonymus japonicus＞Firmiana simplex＞Platanus×acerifolia＞Koelreuteria paniculata＞Buxus microphylla subsp. sinica＞Berberisthunbergii‘atropurpurea’＞Acer elegantulum＞Ligustrum×vicaryi＞Fraxinus chinensis Roxb..In natural conditions,Determination of free proline content of thenine kinds of garden trees, sort by free proline content: Berberisthunbergii‘atropurpurea’＞Buxus microphylla subsp. sinica＞Koelreuteria paniculata＞Platanus×acerifolia＞Acer elegantulum＞Ligustrum×vicaryi＞Fraxinus chinensis Roxb.＞Euonymus japonicus＞Firmiana simplex. Sort by changes in amplitude of free prolinecontent: Ligustrum×vicaryi＞Fraxinus chinensis Roxb.＞Firmianasimplex＞Euonymus japonicus＞Berberis thunbergii‘atropurpurea’＞Acer elegantulum＞Platanus×acerifolia＞Koelreuteria paniculata＞Buxus microphylla subsp. sinica.In natural conditions, Koelreuteria paniculata and Buxusmicrophylla subsp. sinica in the four samples taken in the process,accumulated the least malondialdehyde. Performed better droughttolerance, Acer elegantulum and Ligustrum×vicaryi accumulatedmost of malondialdehyde. Sort by malondialdehyde content: Acerelegantulum＞Ligustrum×vicaryi＞Fraxinus chinensis Roxb.＞Firmiana simplex＞Berberis thunbergii‘atropurpurea’＞Euonymusjaponicus＞Platanus×acerifolia＞Koelreuteria paniculata＞Buxusmicrophylla subsp. sinica. Magnitude sort by malondialdehydecontent changes: Koelreuteria paniculata＞Buxus microphylla subsp. sinica＞Acer elegantulum＞Fraxinus chinensis Roxb.＞Firmianasimplex＞Ligustrum×vicaryi＞Berberis thunbergii‘atropurpurea’＞Platanus×acerifolia＞Euonymus japonicus.Under natural environmental conditions during the samplingdetermination, with the precipitation changes, Euonymus japonicushave a great changes in SOD activity,and Platanus×acerifoliachange tinny. Ligustrum×vicaryi former poor in sort of severalindicators, showed a strong SOD activity indicators . Sort by SODactivity: Ligustrum×vicaryi＞Koelreuteria paniculata＞Firmianasimplex＞Berberis thunbergii‘atropurpurea’＞Acer elegantulum＞Platanus×acerifolia＞Buxus microphylla subsp. sinica＞Fraxinuschinensis Roxb.＞Euonymus japonicus. Sort by SOD activity changemagnitude: Euonymus japonicus＞Berberis thunbergii‘atropurpurea’＞Acer elegantulum＞Ligustrum×vicaryi＞Fraxinus chinensis Roxb.＞Buxus microphylla subsp. sinica＞Firmiana simplex＞Koelreuteriapaniculata＞Platanus×acerifolia.Use the gray relational grade analysis calculate the correlationof each index. Indicators corresponding to the weight is: relativewater content 0.157 ,water saturation deficit 0.152, cell membranepermeability 0.13,the chlorophyll content0.15, free proline content0.138, malondialdehyde content 0.145, superoxide dismutase (SOD)0.127.Selected the six drought physiological indexes on behalf of thegarden trees and drought assessment requirements.By the principal components and the membership functionanalysis method, results show that the drought resistance of ninekinds of garden plants from strongest to the weakest wer as follows:Koelreuteria paniculata＞Berberis thunbergii‘atropurpurea’＞ Euonymus japonicus＞Ligustrum×vicaryi＞Acer elegantulum＞Fraxinus chinensis Roxb..