28770.五種榆科植物解剖結構與抗旱性相關研究

1、東北師范大學碩士學位論文五種榆科植物解剖結構與抗旱性相關研究姓名：佟健美申請學位級別：碩士專業(yè)：植物學指導教師：陸靜梅20090601AbstractParaffin—sectiontechniqueandxylotomyandopticsmicroscopywereadoptedtomakescientificresearchesonanatomicalstructurecomparisonanddroughtresistancefo

2、rthebranchwoodsandleavesoffivekindsofUlmaceaeplantsdevelopingondroughtyarea，thefivekindsofUlmaceaePlantswereUlmusjaponica(Rehd)SargVarsuberosa(Turcz)SDZhao，UlmusmacrocarpaVarmongolicaLiouetLi，UlmusmacrocarpaHance，Hemipte

3、leadavidii(Hance)PlancharidUlmuspumilaIannTheresultsshowthatUlmaceaePlantsusuallytakeonalotofcharacteristicsofdroughtresistanceunderdroughtycircumstances：thecuticlegetsthick，palisadeparenchymasturndeveloped，stomasarenume

4、rousanddistributeonnetherepidermis，someepidermiscellsdilateandcontainviscousnessetcStructuralevolvementofthesexerophilsputstheimportanceonfivekindsofUlmaceaePlantsequallymatchingwithdroughtyadversityAboveall，thepapersele

5、ctsthestructureswhichrelatetodroughtresistanceoffivekindsofUlmaceaeasparameterandcarriesthroughvarianceanalysisandmultiplecomparisoninordertomakeimpersonalityestimateonmagnitudeofdroughtresistanceoffivekindsofUlmaceaepla

6、ntsInanalysisoftherelationshipbetweenstructuralparameterofleafbladeanddroughtresistance，itchoseleafbladethickness，palisadeparenchymathickness，theratioofpalisadeparenchymathicknesstospongyparenchymathickness，upperandnethe

7、rcuticularlayerthicknessofepidermiscell，upperandnetherepidermiscellthicknessandradialdiameterofcostatevesselwhichamounttoeightstructuralparametersasdroughtresistanceguidelinetomakemeasure；inleafstalks，cuticularlayerthick

8、nessofepidermiscellandepidermiscellthicknessandradialdiameterofxylemvesselwerechosentobescaled；inbranch—woods，itselectedwoodfiberwallthickness，woodfiberinnerdiameterandvesselporeradialdiameterofearlywoodontransversesecti

9、onasdrought—resistanceguidelinetosurvey；byvarianceanalysis，theresultrevealsthatallkindsofstructuralparametershavemightydiscrepancyexceptcostatevesselradialdiameterthatisnotremarkabledifference，thenbymultiplecomparison，it

10、canbeknownthatstructuralparametersoftissueregardingasdroughtresistanceguidelines，theiracuityhavehigh—lowdifferenceThehighestacuityguidelinesofdroughtresistanceareleafbladethickness，palisadeparenchymathickness，cuticularla

11、yerthicknessofleafstalkepidermiscell，leafstalkepidermiscellthickness，andwoodfiberwallthickness；higheracuityguidelinesaretheratioofpalisadeparenchymathicknesstospongyparenchymathickness，cuticularlayerthicknessofupperandne