6-BA預(yù)處理對(duì)低溫弱光脅迫下辣椒幼苗光合作用與生理生化特性的影響.pdf

1、甘肅農(nóng)業(yè)大學(xué)碩士學(xué)位論文6BA預(yù)處理對(duì)低溫弱光脅迫下辣椒幼苗光合作用與生理生化特性的影響姓名：楊芳芳申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：蔬菜學(xué)指導(dǎo)教師：郁繼華20090601甘肅農(nóng)業(yè)大學(xué)2009屆碩士學(xué)位論文SummaryXiangyanNO1andXiangyanNO16WaSselected笛materialinthisstudytesearchtheeffectsof6BApretreatmentonthephotosynthesandbio

2、chemicalcharacteristicsinpepperseedlingsunderlowtemperatureandweaklightstress(15“(2／5℃，100gmol‘m2s。1)Spraiedthepepperseedlingswiththe008mmolL。16一BAthatselectedbypreliminaryexperimentbefor3dayswhenthepepperseedlingswereun

3、derlowtemperatureandweaklightstressThepepperseedlingshadbeenspraiedby008mmol‘L叫6BAfor3daysThendeterminatedthegrowthindex，gasexchangeparameters，chlorophyllfluorescenceparameters，activitiesofantioxidantenzymatic，thecontent

4、ofosmoticregulatorymetabolitcsandendogenoushormonesofthepepperseedlingsunderlowtemperatureandweaklightThemainresultsareobtainedasfollows：Theheightgrowthrate，thestalkdiametesrateandthe舭shweightofthebothofpeppercultivarsse

5、edlingspretreatedby008mmolL16BAwerehigherthanthepepperseedlingswithout6BApretreatmentunderlowtemperatureandweaklight008mmolL16BApretreatmentalleviatedthedecreasesofthenetphotosyntheticrate，stomatalconductanceandTroration

6、rateinchilledpepperseedlingleavesunderweaklightFurthermore，008mmolL16BApretreatmentdecreasedtheincreaseoftheintercellularC02concentrationinchilledpepperseedlingleavesunderweaklight008mmolL一6BApretreatmentalsoraisedFv／Fm，

7、‘I)psfl，F(xiàn)v’／Fm’inthechilledpepperseedlingleavesunderweaklightAtthesametime，the6BApretreatmentraisedtheChlorophyllcontentinthechilledpepperseedlingleavesunderweaklight008mmolL。16BApretreatmentdecreasedthepermeabilityofcel

8、lmembraneandincreasedthemalondialdehyde(MDA)productioninchilledpepperseedlingleavesunderweaklight008mmolL_6BApretreatmentalsoenhancedtheactivitiesofantioxidantenzymaticincludingsuperoxidedismutase(SOD)，peroxidase(POD)，ca

9、talase(CAT)，ascorbateperoxidase(APX)inthechilledpepperseedlingleavesunderweaklightO08mmolL‘16BApretreatmentalleviatedtheincreasesofthecontentofprolineinchilledpepperseedlingleavesunderweaklightO08mmolL16BApretreatmentals

10、aisedthecontentofsolubleproteininthechilledpepperseedlingleavesunderweaklight008mmolL一6BApretreatmentalleviatedtheincreasesofthecontentofABAinchilledpepperseedlingleavesunderweaklightO08mmolLd6BApretreatmentalsaisedtheco