外源酚酸對黃瓜自毒作用的生理生化機(jī)制研究.pdf

1、東北農(nóng)業(yè)大學(xué)博士學(xué)位論文外源酚酸對黃瓜自毒作用的生理生化機(jī)制研究姓名：吳鳳芝申請學(xué)位級別：博士專業(yè)：農(nóng)學(xué)指導(dǎo)教師：馬鳳鳴2002.11.1墨墾莖墨苧苧萋!!!!竺!!旦Studiesonphysiologicalandbiochemicalmechanismofexogenousphenohcacidsoncucumber’SautotoxiceffectAbstractWimthedevelopmentofsocialeconomya

2、ndtheincreaseofpeople’SlivingstandardsvegetablescultivatedundersUucturehavebecomeoneofthemostactiveagriculturalCucumber(CucumissatnnlsL)isthefavorablevegetableforChineseandhasbecomethemainvariebofgreenhousevegetablesHowe

3、verthecontradictionbetweenlimitedlandandmarketsupplyallyearlongresultedinthefactthatcontinuouscmppingobstaclesbecomecorrlmonandseriousmoreandmoreAutotoxiceffectisoneofthemOstimportantfactorsofcontinuouscroppingobstaclesT

4、hisstudb，choosetwokindsofexogenousphenolicacids(phydroxybenzoicacidandcinnamicaci小whichhavebeenverifiedtobenefitforcucumbersautoqoxiceffect，anddifferentlevelsofconcen刪onwereinvolvedtoanaloguetheeffectundersubslratecultur

5、eandsoilculture1nordertooffertheoreticbasesandwackindicatortoalleviateoreliminatecon婦uouscroppingobstacleswehaveresearchedsystematicallytheeffectsofphenolicacidsonphysiologicalandbiochemicalmechanismofcucumber’Sautotoxic

6、effectincludinggrowthandyieldofcucumberseedlings，sWactureandfunctionofcellularityul佻tructureofseedlingsandSOonThemainresultsareasfollows：1Exogenousphenolicacidscaninhibitedsignificantlygrowthanddevelopmentofcucumberunder

7、50uM150uMofsubstratecultureand50mg／kg200mg&gsoilculturewhiletheycanplayanoppositeroleunder25uMofsubsWatecultureand25mg／kgSoilculture2Forcucumberseed峪theintensityofautotoxiceffectofexogenousphenolicacidsundercontinuouscmp

8、pillgsoilarehigherffmnthatoffieldsoilunderthesameconcen姐fionItshowsthecloserelationshipbel、mncx)ntlltuouscmppingobstaclesandautotoxiceffect3throughdecreasingthe扯6V時ofprotectivedlzymesandreoxidationenzymes，e瑚罾∞aL]sphenoli

9、cacidsue婦flaeclearanceabilityofplantsdefencesystemdestroydynamichalancebetweenproductionandclearanceoffleeradicalunderthenonaalconditionmakelorsoffleeradicalremainhiplantandacceleratemembranelipidperoxidization；Meanwhile

10、，phenolicacidschangetheingredientandcontcntoffat村acidinmembranelipidinhibittheactivityofATPerlzymes，therebydeslroythestructureandfunctionofmenbranedecreaseitsfluid峨increaseitspermeationheightentherateofconductance，makenu