1-甲基環(huán)丙烯延緩采后甜瓜果實(shí)衰老的研究.pdf

1、新疆農(nóng)業(yè)大學(xué)碩士學(xué)位論文1甲基環(huán)丙烯延緩采后甜瓜果實(shí)衰老的研究姓名：孫愛萍申請學(xué)位級(jí)別：碩士專業(yè)：食品科學(xué)指導(dǎo)教師：李學(xué)文20090601Studyonl—MethylcyclopropeneDelayPostharvestSenescenceofHamiMelonFruitAbstracthamimelon(CucumismeloU‘Zaohuangmi’wereusedtostudytheeffectofIMCPonpostharv

2、estphysiologyandqualitiesMelonfruitweretreatedwithO1川Lil山L～，5山Lq1MCPatroomtemperaturefor24hoursonthedayofharvest，thenstoredat25℃Treatmentwith1山L—and5山L‘1MCPinhibitedsignificantlyrespirationrateandethyleneproduction，delay

3、edorsuppressedtheoccurrenceofclimactericpeaksofrespirationrateandethyleneduringstorageThebothofincreasinginelectrolyteleakageofmesocarptissureandlossingoffimnessoffruitweresuppressedsofteningoffruitfleshWaSslowedeffectiv

4、elybyIMCPtreatmentNodifferenceatTAcontentoffruitamongtreatmentswereobservedthroughoutstorage1MCPtreatedwith1山L‘、5mL～fruitmaintainedSSC，reducedchlorophylldegradationoffruitepicarpat12drespetivelyafterharvestThepostharvest

5、fruitdiseaseWasinhibiteddramatically，decayrateandindexofmelonfruitwerereducedbyallIMCPtreatmentsincomparisontothecontr011MCPtreatedfruitsdelayedtheonsetoffruitdiseaseby6d、10dand12drespectivelycomparedtocontrolsThesametim

6、e，theothervariety‘Goldenqueen’wereusedthisexperimentTheresultsshowedthattreatmentwith1MCPbeforestoragesignificantlyinhibitedrespirationrateandethyleneproduction，Thebothofincreasinginelectrolyteleakageofmesocarptissueandl

7、ossingoffirmnessoffruitweresuppressedsofteningoffruitfleshWasslowedeffectivelyby1MCPtreatmentThepostharvestfruitdiseaseWasdramaticallyinhibiteddecayratewerereducedby1MCPtreatmentsincomparisontothecontr01hamimelon(Cucum／s

8、meloL)‘Zaohuangmifruit’treatedwithlidL『‘IMCPwereusedtostudythemechanismof1MCPindelayingpostharvestsenescenceofearlyharnimelonfruitTheresultsshowedthattreatmentwith1MCPinhibitedthedeclineofCATactivity，increasedSODactivity

9、atthebeginningofstorage，acceleratedtherisingofPODactivityandreacheditpeal(at4thday，depressedtheproductionrateofsuperoxideanionanddeclinedtheMDAcontentofmelonfruitFruittreatedwith1MCPmaintainedfinefirmnessduetoIMCPinhibit

10、edtheenzymesactivityofPG、PME、GAL、IglucosidaseinmelonfruitFurtherstudyshowedthatIMCPincreasedACCaccumulation，inhibitedACOactivity，delayedtheincreasingofACSactivityatthelatestageofstorageKeywords：I—MCP；Melon；Physiologicalc