水分脅迫下不同馬鈴薯品種的耐旱生理研究.pdf

1、水分脅迫下不同馬鈴薯品種的耐旱生理研究Droughtresistancephysicalstudyofdifferentpotatoesspeciesinresponsetowaterdroughtstress申請人：薩如拉學位名稱：農業(yè)推廣碩士領域：農業(yè)資源利用指導教師：史樹德副教授論文提交日期：二○一二年四月分類號Q94UDC581學校代碼10129學號2010202064Droughtresistancephysicalstudy

2、ofdifferentpotatoesspeciesinresponsetowaterdroughtstressAbstractThisexperimentwascarriedoutinthegreenhouseofthefarminInnerMongoliaAgricultureUniversitywithpotting.FivedifferentvarietiesofpotatoeswerechosewhichwereG1(Root

3、optimalNO.1)theG2(RootoptimalNO.2)G3(RootoptimalNO.3)G4(RootoptimalNO.4)F1(Favitevariety).Comparingthedroughtresistantphysiologyrelatedphysiologicalactersofpotatoanalysistheindexeswhicharecloselyrelatedwithwateruseeffici

4、encytoexpletheeffectofwateruseefficiencyonpotatophysiologicalacterproduction.Theindexesaremphologicalindexesphotosyntheticphysiologicalindexes(photosyntheticratetranspirationratechlophyllcontent)osmoticregulationsubstanc

5、es(prolinerelativepermeabilitybetweencytoplasmcellmembraneMDA)membraneprotectionsystem(peroxidasesuperoxidedismutase(SOD)catalase).Themainresultswereasfollows:1.Throughtheresearchofmphologicalindexofdifferentpotatoesvari

6、etiesindicatedthattherootlengthofpotatoeshadsignificantpositivecrelationwithrootfreshweightfreshweightofabovegroundbiomassplantheighttheyieldperplanthadobviouscrelationwithplantheight.Itreflectedthatexuberantrootsystemab

7、ovegroundbiomassofpotatoeswerenotonlyusedtoimprovetheabilityofabsbingwaternutrientbutalsoproduction.TherootsystemofgenyouserieswasmeexuberantthanGermanvarietysoitissingleplantyieldwasrelativelyhigher.2.Thestudyofphotosyn

8、theticphysiologicalindexesofleavesindicatedthattranspirationstrengthstomatalconductancephotosyntheticrateofdifferentpotatovarietieshadsignificantdifferences.Leafwateruseefficiencyhadsignificantpositivecrelationwithphotos

9、yntheticratethespeciesofgenyouserieshadstrongerabilityofrootgrowthmoistureabsptionbladegrowthdevelopmentosmoticregulationhigherwateruseefficiency.Therefethewateruseefficiencyofsimpleleafwasinfluencedbyphotosyntheticratet