楊樹葉片酚類物質(zhì)對秋季溫度驟降的響應(yīng).pdf

1、UniversityCode：10225RegisterCode：080475DissertationfortheDegreeofMasterResponsesofphenoliccompoundsinpoplarleavestothetemperaturestrikinglydroppedinautumnCandidate：Supervisor：AssociateSupervisor：AcademicDegreeAppfiedfor：

2、Speciafity：DateofOralExamination：University：GaoDandanProfYanXiufengProfWangYangMasterCellbiologyNortheastForestryUniversity東北林業(yè)大學(xué)碩士學(xué)位論文AbstractTheexperimentusedthreepoplarvariefies(PpsuedosimoniixPnigraxPnigraCL‘A5’，Ppsu

3、edo—simoniixPnigraxPnigraCL‘HeilinIII’，PdeltoidesxPcathangana)withdifferentfrozenresistanceaStesingmaterialsThemembranepermeabilityphenolscontent，polyphenoloxidaseactivityandsolublesugarcontentresponsetothetemperaturestr

4、ikinglydroppedindifferentfrozenresistancepoplarleaveswhichtreatedwithlowtemperaturewhenpoplarwon’tenterintodormancyphaseinautumnTheresultsWasshowed：Themembranepermeabilityofthreepoplarvarietiesleavesraisedwithtemperature

5、downThemembranepermeabili夠hasnosignificantchange謝t11slighttreatmentoftemperaturestrikinglydropped，butcome誦ms仃ongertreatmentoftemperaturestrikinglydropped，membranepermeabilityhassignificantchangedPdeltoidesxPcathanganahas

6、mostsignificantchanged，只psuedosimoniixPnigraxPnigraCL‘A5’hasalittlechangedThisshowthatmembraneofPpsuedosz’moniiPnigraPnigraCtoGA5’leaveshasthehighestresistancetochillinginjurythen只psuedosimoniiPnigraxpnigraCL‘HeilinⅢ’and

7、PdeltoidesxpcathanganaAftertreatmentoftemperaturestrikinglydropped，thereisnosignificantchangeinintotalphenol，lignin，flavonoidinleavesofthreepoplarvarieties，butourresearchalsofindthatthecontentoftotalphenolandligninin尸del

8、toidesxPcathanganaleavesislowthecontentofcondensedtannininleaveschanges、橢thdifferentfrozenresistanceofpoplarvarietiescondensedtannincontentinleavesofPdeltoidesxPcathanganaislowertheninPpsuedo—simoniixPnigraxPnigraCL‘A5’a

9、ndPpsuedosimoniixPnigraxPnigraCL‘HeilinⅢandthecontentofcondensedtartnininPdeltoidesxPcathanganaleaveshasnosignificantchangealllongAsthetemperaturewaslowoutside，polyphenoloxidaseactivityinPpsuedosimoniixPnigraxPnigraCL‘A5

10、’andPpsuedosimoniiPnigraPnigraCL‘HeilinⅢ’leavesraisedremarkablywithenhancingthedegreeoftemperaturestrikinglydropped，polyphenoloxidaseactivityin只deltoidesxPcathanganaalwayshasnosignificantchange，buttheactivityofpolyphenol

11、oxidasein只deltoidesxPcathanganaleavesishigherthanin戶psuedosimoniixPnigraxPnigraCL‘A5’andPpsuedosimoniixPnigraxPnigraCL‘HeilinIII’leavesThesolublesugarcontentinthreepoplarvarietiesleavesraisedwithtemperaturedown，Intwodays

12、whentemperaturedroppednaturally，PpsuedosimoniixPnigraxPnigraCL‘A5’leaveshashighestsolublesugarcontent，andPdeltoidesxPcathanganaleaveshaslowest，KeywordsPoplarleaves；Temperaturestrikinglydrop；Phenolics；Membranepermeability