大豆鎘毒害耐性的基因型差異和鎘與鋁、鈉和鉀的互作效應(yīng).pdf

1、泖多哆Z乎博士掌位論文⑨大豆鎘毒害耐性的基因型差異和鎘與鋁、鈉和鉀的互作效應(yīng)TheGenotypieDifferenceinCadmiumToxicityToleranceandInteractionbetweenCadmiumandAluminum，SodiumandPotassiuminSoybean研究生姓名IreranHaiderShamsI學(xué)科、專業(yè)所在學(xué)院指導(dǎo)教師作物學(xué)農(nóng)業(yè)與生物技術(shù)學(xué)院張國平教授論文提交日期：二零零六年五月

2、目#SODandPODenzymesweresignificantlyincreasedwithCdtreatment，andtheincreasedifferedsignificantlybetweenQI73and$95l一3，beinghigherinQ17—3(3)Inthethirdexperiment，synergisticeffectsofAIandCdWaSstudiedusingtwosoybeanvarietiesv

3、izLiao一1andZhechun2，differinginAItoleranceThereweresixtreatmentspH65；pH4O；pH65I0grnolL“Cd；pH4010runolL“Cd；pH40150vmolL。AI；pH4010gmolL。Cd150gmolL～AIThelowpH(40)andAItreatmentscausedamarkedreductioninthegrowth，chlorophyllc

4、ontentandphotosyntheticrateSignificantlyhigherMDAcontenLSODandPODactivitiesweredetectedintheplantsexposedtObothA1andCdthaninthoseexposedtoAltreatmentaloneAdrasticenhancementofSODandPODactivityWaSobservedintheplantsexpose

5、dto150gmolL～AIrelativetothecontrolwithoutAIadditionAIsensitivecultivarZhechun2hadaconsiderablyhigheractivitythanAI—tolerantLiao1CadmiumadditionincreasedAIconcentrationintheplantsexposedtoAlstressandthetolerantcultivarhad

6、relativelylowerconcentrationCombinedapplicationofCdandAIenhancedtheiraccumulationinroots，butcausedareductioninshootsTheconcentrationsofallthe10nutrientsdetermined(P，K，CaMg，F(xiàn)e，Mn，Cu，ZnandB)，exceptMowerealsoincreasedwhenpl

7、antswereexposedtoIOWpHrelativetopH65Aladditioncausedareductionintheconcentrationofmostnutrientsinbothplantparts；butK，MnandZninrootswereincreasedA1sensitivegenotypeZhechun2hadIowernutrientconcentrationthanAI—tole(antgenot

8、ypeLiao1(4)Inthefourthexperiment，effectsofNaCI(50mmolLI1)andCd(19molLI)assoleandCombinedongrowth，chlorophyllcontentphotosynthesisandfluorescencechangesinleaveswerestudiedusingtwosoybeangenotypes，Huachunl8andNGBTheplanthe

9、ightwaslowestinbothgenotypesunder50mmolL～NaCltreatmentHuachun18sufferedamoreseriousdeclinethanNGBfornetphotosyntheticrate(Pn)undersalinityandcombinedstress(NaCICd)，suggestingHuachun18isrelativelyasaltsensitivegenotypeThe

10、reductionofPncausedbysaltstressinHuachunI8Wasmainlyduetothedecreaseoftotalchlorophyllcontentandphotosyntheticefficiency(F“Fm)，whereasthatinNGBwascausedbythemodificationofgsThecombinedstressesdidnotinduceafurthersuppressi

11、oninphotosynthesisandfluorescenceinbothgenotypesrelativetosaltorCdstressaloneHigherCdconcentrationwasfoundinbothseedsandpodswhentheplantswereexposedtosaltstressHigherchangesintheconcentrationofZn2，Ca2，M92，KandNaweredetec