酚酸類物質對鹽分脅迫條件下黃瓜幼苗生理特性的影響.pdf

1、東北農業(yè)大學碩士學位論文酚酸類物質對鹽分脅迫條件下黃瓜幼苗生理特性的影響姓名：王華申請學位級別：碩士專業(yè)：蔬菜學指導教師：吳鳳芝20051213東北農業(yè)大學農學預jj學位論文AbstractThisstudytookcucumber(ShandongMICllaStheresearchmaterial，added200mmol／LNaCLsolutiontothenutritionbowlonthefirsteuphyllatimean

2、dthefourtheuphyllatimerespectivelyandfromtheflrsteuphyllatimetothefortheuphyllatimechoosetwokindsofexogenousphenolicacids(PhydroxybenzoicandCinnamicacid)wjchdiffbrentconcentration(25umol／L，50umol／L，100umol／L)，inordertost

3、udytheeriectsofsaltstressonthegrowthofcucumberseedlingsandtheeffectsofexogenousphydroxybenzoicandCinnamicacidonDhysiologicalcharacteristicofcucumberseedlingsunderthesaltstressThetestfirstlystudiedthecatabaticeffectsofsal

4、icylicramificationCinnamicacidoncucumberseedlingsundersaltstress；andascertainedthebestconcentrationandthebesttime，Thestudyprovidedthetheorybasisforresolvedthesoilsalinizationjntheestablishmentplantingitishi曲erappliedvalu

5、eTheresultsofthestudyareasfoIlows：1TwokindsofexogenousphenolicacidsincreasedtheactivitvofSODandPODundersaltstressthetreatmentwhichthetreatmentconcentra“onis50umol／Landthetreatmenttimeisonthesecondeuphyllatimeisbestthanot

6、hers，thedifferencereachedtothebestsignificant，buttheactivityofSODandPODwithtreatmentof100umol／LphenolicacidsconcentrationisnotsignificanttheactivityislowerthanCKl，theeffectisnotgood2Phenoliccompounddecreasedtherelativeco

7、nductanceandMDAcontentofcucumberseedlingsundersaltstress，andthetreatmentwhichthetreatmentconcentrationis50umol／Landthetreatmenttimeisonthesecondcuphyllatimeisbestthanothers，thedifferencereachedtothebestsignificant3Thecat

8、abaticeffectofCinnamicacidisbetcerthanthatofphydroxybenzoicweanalyzedtheresultsofSOD，POD，MDAandREC，althoughthecatabaticeffectofCinnamicacidandphydroxybenzoicisobvious，theeriectofCinnamicacidisbeneL4Comparedtheeffectsoftr

9、eatmentswithsaltsolutionfirstlyandlastlythedifierencesofthecontainingwaterquantityandthechlorophyllcontentarenotobvious，throughtheanalysisofresultsofSOD，POD，MDAandREC，wecanfoundthattheearliersaltharmsymptomoftreatmentsof

10、saltsolutionaddedlastlyisobvious，thedifferencewitt；treatmentsofsaltsolutionaddedfirstlyjsobvious，butatthedeterminingmidandanaphase。thedifferencejsnotobviousandwi也thetreatmenttimeprolonged，tilecatabaticeffectisobvious5Thr

11、oughtheanalysisofresultsofSOD，POD，MDAandRECatthefourtheuphyllatime，thecontainingwaterquantityandthechlorophyllcontentofA22andB22arehigherthanCKl，PhenoliccompoundimprovedtheactivityofSODandPOD、atsametimedecreasedtheMDAcon