高氧對香蕉采后呼吸代謝的影響.pdf

1、華南師范大學(xué)碩士學(xué)位論文高氧對香蕉采后呼吸代謝的影響姓名：劉海申請學(xué)位級別：碩士專業(yè)：植物學(xué)指導(dǎo)教師：林德球2003.6.1Theobjectiveofthisstudyistoinvestigatetheeffectofttl垂oxygenonstoragelife，physiologyandbiochemistryofposthharvestfruitTheresultsareasfollows1Effectsofhighoxyge

2、noncolorfirmnessrespiratoryrate，ethyleneproductionandrelativepermeabilityofbananafruitExposureofbananafruittohiglloxygenconcentrationsacceleratedchangesinskincolorresultedinpulpsofteningincreasedpermeabilityofcellmembran

3、eandshonenedpeaksofrespirationrateandethyleneproductionFurthermore，theeffectsweremoreobviousasoxygenconcentrationsincreased2EffectofhighoxygenonactiveoxygenmetabolismApplicationofhigh02concentrationsaccelerated02“。produc

4、tionandH202accumulation，stimulatedactivitiesofSOD，PODandCATattheearlystageofstorageDuetounbalancebetweenaccumulationofsuperoxideanionandhydrogenperoxideandthecapacityofantioxidantsystems，therewereenhancedlipidoxidationan

5、dahiighMDAlevelresultinginthesenescenceofthefruitMoreoverthesenencencebecamemoreobviouswithincreased02concentration。3Effectofhighoxygenonenergycharge100％02and60％02significantlyaccelerateddecreaseincontentsofATPandADPandl

6、evelofenergychargeoffruitpeelandfleshWhereasthecontentsofATPandADPandthelevelofenergychargeofbananafruitexposedto21％02wererelativelyhigh，withslightreductionatthelatestageofstorageThechangeinAMPcontentofbananafruitexposed

7、tofouroxygenconcentrationswascontrarytothatofATPcontentThepreliminarystudysuggestedthesenescenceofbananafruitcausedbyhi曲02treatmentsmayrelatetoacceleratedethyleneprodutction，enhancedrespiration，decreaseinthecapacityofaat

8、ioxidantsystemsandincreaseddamageofmembranestructure；thepossiblemechanismofhighoxygenwhichcausedthesenescenceofbananafruit，involvinginthelossofenergycharge，wasdiscussedKeywords：banana，highoxygen，storageeffect，respiratory