外源水楊酸對獼猴桃果實軟化衰老的影響及其機制研究.pdf

1、湖南農(nóng)業(yè)大學(xué)碩士學(xué)位論文外源水楊酸對獼猴桃果實軟化衰老的影響及其機制研究姓名：王晶瑩申請學(xué)位級別：碩士專業(yè)：果樹學(xué)指導(dǎo)教師：王仁才2003.6.1StudiesonEffectsofSalicylicAcidonFruitSofteningandSenescenceandItsMechanismofKiwifruit(Actinidia)AbstractKiwifruit∽ctinidia)isakindofberryfruitwith

2、specificrespiratoryclimacteric，whichCall’tundergolongtimestorageandtransportunderordinaryconditionsSothedevelopmentofkiwifruityieldingandimprovementofeconomicbenefitsarerestrictedWiththestudiesoneffectsofSalicylicAcid(SA

3、)onphysiologicalfunctionofplantdeveloping，itwasfoundthatSAhasthefunctionofscavengingthehydroxylradicalsandsuperoxideradicalAndSACanrestrainthebiosynthesisofethyleneThussomescientistspresumedthatSAmaybeusedtokeepfruitsand

4、vegetables丘eshThisisveryimportanttothestudyonthestorageandkeepingfreshofkiwifmitTherefore，nine—yearoldActinidiaChinensisCVFengyueandsix—yearoldActinidiadeliciosaCVMiliang1wereusedaSmaterialsPostharvestfruitsof‘Fengyue’we

5、resoakedinSAsolutionofdifferentconcentration(125，25，5mmol／L)Preharvesttreatmentof125mmol／LSAsprayingthefruitsandleavesandpostharvesttreatmentofimmersingfruitsinsolutionsof125，25，5andlOmmol／LSAwereappliedto‘MiliangI’kiwif

6、ruitWeaimatstudyingtheregulatingeffectsofSAonthesofteningandsenescenceofkiwifruitanditsmechanismTheresuitsshowedthat‘Fengyue’kiwifimit，treatedby5rnrnol／LS氣hadbetterstoragequalitythananyotheronesimmersedinSAsolutionsofoth

7、erconcentrationfruitflrnlnessofwhichWaSthehighest(O38MPa)，andsotleningfruitratioofwhichWaSthelowest(3333％)at101dayafterstorage(DFS)Thegoodfruitratioofpreharvest125mmol／LSAtreated‘MiliangI’kiwifruitsisthehighest(8056％)And

8、fruit儷innessofpostharvesttreatedones，SOakedjll10mmol／LSAWashiOaerfO59MPa)at10lDFSWealsofoundthatthereweresignificantdifferencesinthephysiobiochemicalchangesbetweenfiuitsofthetwocultivarsDuringcoldstorage，therespiratoryin

9、tensitypeakof‘Fengyue’kiwifruitdidn’tappeareduntiUabout81DFS；thepeal【ofLOXactivityoccurredataround22DFSTheAmylaseactivitydeclinedatthebeginningofthestorage22dlaterithadthetrendtoincreasewiththepeakappearingat61DFSThePGac