鎘對油菜的毒害效應以及施用外源激素對鎘毒害的調(diào)控作用.pdf

1、浙江大學碩士學位論文鎘對油菜的毒害效應以及施用外源激素對鎘毒害的調(diào)控作用姓名：孟華兵申請學位級別：碩士專業(yè)：作物學指導教師：蔣立希20070501浙江丈學硬士學位論文AbsaraetAbstractOilseedrape(Brassicanapus)isaspeciesbelongingtothefamilyCruciferaeIteonsist!ofthegenomeCfromBrassicaoleraceaandthegenomeA

2、fiomBrassicacampestris，ItisinterestedtobeappliedaspioneercropinremedyingtheamblefieldsthatcontaminatedbytheindustrywasteduemainlytoitsrelativelyhugebiomassAtthemeanwhile，itisalsoofparticularimportanceinthestudyonthemecha

3、nismofplanttolerancetoabiotic$tressdue協(xié)itsallopolyploidnatureInthisshld嗨weinvestigatedthetoxiceffectofcadmiumingerminationstageandtheroleofexternalplantgrowthregulatorsinalleviatingthetoxicityin57leavesplantletsof“Zheshu

4、ang72”alocalcultivarthathas‘doublelow“seedqualityOurexperimentalresultsindicatedthat(1)Lowcadmiumconcentrationslightlypromotedseedgerminationaswellasrootgrowth；whilsthighcadmiumconcentrationsignificantlyinhibitedseedgerm

5、inationandrootgrowth。(2)Theapplicationofcadmiumhadnegativeeffectontheactivitiesoftwoenzymes，namelytheisocitrateandlipasewhichplaykeyroleinseedgermination，(3)Thegerminatedseedsrespondedtoincreasingcadmiumconcentrationwith

6、higherconcentrationofsucrose，butlowerconcentrationoffructoseOntheotherhandtotalsacehafidecontentingerminatedseedsdecreasedgraduallyinrespondingtoincreasingcadmiumatfirstbutitincreasedwhenthecadmiumconcentrationreachedtoa

7、certainlevel(4)CadmiumaffectednegativelyollseedlingsofoilsaedrapeinteTmSofchlorophyllcontentweightofdriedbiomassThedegreeofcadmiumtoxicitycouldbereflectedbythealternationofactivitiesofascorbateporoxidase(APX)，catalase(CA

8、T)，peroxidase(POD)，superoxidedismutase(SOD)aswellasMDAcontenL(5)Theapplicationofoneofthefollowingplantregulators，namelyjasmonicacid，abscisicacidgibberellin，salicylicacidaffectedcadmiumtoxicityonrapeseedplantletsaReraIOda

9、ytreatmentJAandABAWereabletoalleviatethecadmiumtoxicityandtheirrolesinregulatingtheplanttolerancetocadmiumstresswerethemostobviousGAtookpartinthetolerancetocadmiumstresstoo，howeveritseffectwasnotcomparabletothoseofJAandA

10、BASAalsoplayedroleinregulatingthecadmiumtoxicityhoweverincomparisontoJA，ABAandGA，itdidnotalleviatethetoxicsymptom，butaggravatedthetoxicsymptominsteadKeywords：Cadmium，Rapeseed(Brasaicanapus)，Toxiceffects，Plantgrowthregula