靈武長棗果實(shí)糖代謝生理機(jī)制的研究.pdf

1、獨(dú)創(chuàng)性聲明本人聲明所呈交的論文是我個(gè)人在導(dǎo)師指導(dǎo)下進(jìn)行的研究工作及取得的研究成果。盡我所知，除了文中特別加以標(biāo)注和致謝的地方外，論文中不包含其他人已經(jīng)發(fā)表或撰寫過的研究成果，也不包含為獲得寧夏大學(xué)或其它教育機(jī)構(gòu)的學(xué)位或證書而使用過的材料。與我一同工作的同志對(duì)本研究所做的任何貢獻(xiàn)均已在論文中作了明確的說明并表示了謝意。研究生簽名：雄心備時(shí)間：溯產(chǎn)年，月可日關(guān)于論文使用授權(quán)的說明本人完全了解寧夏大學(xué)有關(guān)保留、使用學(xué)位論文的規(guī)定，即：學(xué)校有權(quán)

2、保留送交論文的復(fù)印件和磁盤，允許論文被查閱和借閱，可以采用影印、縮印或掃描等復(fù)制手段保存、匯編學(xué)位論文。同意寧夏大學(xué)可以用不同方式在不同媒體上發(fā)表、傳播學(xué)位論文的全部或部分內(nèi)容。(保密的學(xué)位論文在解密后應(yīng)遵守此協(xié)議)時(shí)IBI：加肜年歲月彩日時(shí)間：≯叼≯年，月留日才許。疋鰳蘩後套印繇∥簽名生簽究師研導(dǎo)AbstractInthisstudyweusedZiziphusjujubaMillcv1ingwuchangzaoastestmater

3、ialsandfocusonsugaraccumulationandmetabolismtesearchthephotosyntheticcharacteristicsofleavesandfiuitsintheprocessoffruitdevelopment，thesugaraccumulationandsucrosemetabolizingenzymeactivitiesofleaves，carpopodiumandfruitin

4、differentstagesoffruitdevelopment，theeffectofshadingonpigmentcontent，sugarmetabolismandaccumulation，andthediscrepanciesamongdifferentstrainsofZiziphusjujubaMillcv1ingwuchangzaoinsugarmetabolismandaccumulationTheresultsho

5、wedthat：1)ThegrowthcurvesofZiziphusjujubaMillcv1ingwuchangzaofruitshoweddoubleSpaRern，therearetwapidgrowthphasesSucroseisthemainmodeofsugaraccumulation，theratioofsucrose／reducingsugarwasahout12atripestageIntheearlyoffrui

6、tdevelopment，acidinvertase(AI)，neutralinvertase(NI)andsucrosesynthase(SS)participateinsucrosecatabolism，inthelateoffruitdevelopment，sucrosesynthaseenzymesynthesisdirection(SSs)andsucrosephosphatesynthase(SPS)areimportant

7、enzymeswhichcatalyzethesynthesisofsucroseSucrosesynthaseenzymesynthesis(SS—S)playsamajorroleinregulatingthesugarmetabolismofZiziphusjujubaMillcv1ingwuchangzaofruit2)Bothleavesandfruitshavephotosyntheticcapacity，butmajori

8、nginleaves’photosynthesisPhotosyntheticefficiencyofleavesandfruitsareaffectedbytemperatureandlight，therebyaffectingthegrowthandtherelatedsugarcontentinfruitThenegativepeakofnetphotosyntheticrate(Pn)infruitistheresultofre

9、spirationandphotosynthesisInthisstudythepigmentcontentandnetphotosyntheticratewerenegativelycorrelatedFruitinfluenceonsinkstrengthbypassingahightranspirationrate(Tr)，stomatalconductance(Gs)andintercellularC02concentratio

10、n(Ci)toachievetheadjustmentofsourceleaves’photosynthesis3)LeavesandcarpopodiummainlyaccumulatedsucroseandstarchrespectivelySucroseinthestalkofthevascularbundlesformsacertainconcentrationgradientfromveintocarpopodium，whic

11、hensurethatthesugartransportfromthesourcetosinkIntheentireperiodoffruits’growthanddevelopment，thereisasimilarityofenzymeactivitiesonsucrosecleavagebetweenleavesandcarpopodiumActivityofenzymesonsucrosesynthesisincarpopodi

12、umarehigherthantheleavesSugarmetabolizingenzymesactivityinleavesandcarpopodiummainlymanifestascleavagedirection4)ShadingdoesnotchangevariationregulationofgrowthandsugaraccumulationinZiziphusjujubaMillcv1ingwuchangzaofrui

13、t，butthecorrespondingindexeshavedifferentdegreesdeclineInthelateoffruitdevelopment，thevolumeandaccumulationofsucroseareaffectedmostlycomparedwithcontorlgroup，thedecreasedpercentagesofvolume’Sandsucrose’Scontentatripestag