face条件下o3浓度增高对小麦叶片衰老特性的影响

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1、优秀毕业论文高春艳：FACE条件下03浓度增高对小麦叶片衰老特性的影响3一EffectsofFreeAirOzoneConcentrationEnrichmentonSenescenceCharacteristicsinWheatLeavesPostgraduate：GaoChmlyaIlSupervisor：Prof．GuoWenshanCo-Supervisor：Prof．FengChaonianA．Prof．ZhUXinkaiDr．LiChunyan(YangZhouUniversity，Yangzhou，22500

2、9)AbstractFreeairozoneconcentrationenrichmentsystemwithambientlevel(A-03)and50％higherthanambientlevel(E·03)wasestablishedinXiaojiTown，JiangduCounty,JiangsuProvince，China(1190420’E，320355，N)from2007to2009．Ineachplot，fivetypicalvarieties：Yangmai16，Yangmail5，Yangfuma

3、i2，Yannon919andJiaxin9002wereplanted．Themainresultswereasfollows：1．Wheatgrainyieldsignificantlydecreasedunder03concentrationenrichmenttreatment，thedifferenceofgrainyieldamonggenotypesandtheinteractionbetween03concentrationandgenotypeswereverysignificant．Theeffecto

4、f03concentrationonearnumberwasinsignificant(2008)orsignificant(2009)，andtheeffectongrainnumberperspikeWassignificant(2008)orinsignificant(2009)．Theeffectof03concentrationongrainweightWasinsignificant(2008)orverysignificant(2009)，whilethedifferencebetweengenotypesw

5、asnotsignificantandtheinteractionbetween03concentrationandgenotypesWasverysignificant．精品参考文献资料优秀毕业论文4扬州大学硕士学位论文一2．03stressacceleratedtheagingprocessafteranthesis．In03concentrationenrichmenttreatments，wheatleavesbecameyellowearly．03enrichmentfastenedthedeclineofthe

6、groupsofLAIfrombootingstagewhenmaximumleafareaindexappeared，mainlybecause03stresscausedphotosynthetictissueofwheatflagleavesbedamaged，chloroplastanditsgranalamellaeinleafcellsweredisorganized，thedecreasingspeedofchlorophyllcontent、carotenoidcontentandnetphotosynth

7、eticrateofflagleavesWasfaster．thelastingperiodofphysiologicalfunctionofflagleavesshortened．Thecontentsofsolublesugarandsucroseinflagleavesdecreased，andthedrymatteraccumulationamountafteranthesiswassignificantlylowerthanthatinA一03treatment．3．03stresscausedSOD，POD，C

8、ATactivitiesinflagleavesdeclinefasterduringgrainfillingperiod．TheactivitiesbecamesignificantlydifferentbetweenE一03treatmentandA-03treatmentafterthe21std