鎘對油菜的毒害效應(yīng)以及施用外源激素對鎘毒害的調(diào)控作用.pdf

1、浙江大學(xué)碩士學(xué)位論文鎘對油菜的毒害效應(yīng)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(xué)位級別：碩士專業(yè)：作物學(xué)指導(dǎo)教師：蔣立希20070501浙江丈學(xué)硬士學(xué)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