稀土鈰在草坪中的應用以及草坪植物抗旱生理生態(tài)響應.pdf

1、天津師范大學碩士學位論文稀土鈰在草坪中的應用以及草坪植物抗旱生理生態(tài)響應姓名：滕萌申請學位級別：碩士專業(yè)：植物學指導教師：多立安20070301天津師范大學研兜生學位論文Abska文InordertostudytheeffectsofFareearthelementceriumonthetwotypeofturfgraasLoliumperenneLandFestucaarundinaecakSolnekindsofinstrmne瞧t

2、s勰LICOR6400ICPAESeta1hadbeenused。andalsothemodernbiologicaltechnology11鏘seedvigorantioxidantenzymesphotosyntheticcharactertheabsorptionofmineralelements，andotherphysiological，ecologicalindexhadbeenmeasured曩結resultsshowed

3、that：(1)n幢seedgerminationandtheseedlinggrowthhadbeenimprovedwhentheseedsWeI“0soakedwiththeceriumfiquorTheoptimumconcentrationofceriumwasbet3Ⅳecn200mgU‘and300mgL1Underthisconcentrationextentthegerminationindexandtheseedvi

4、gorofLoliumperenneLandFestucaarundinaceaLWereallincreasedandthebiomasstherootgrowththechlorophyllcontentwe嘴alsobetterthanthecontr01國Whorladdtherareearthelementsceriumtothesoilmediumthegerminationandseedlinggrowthofturfgr

5、assLoliumperenneLandFestuca口，wHd婦加Ic∞LwereimprovedThebestconcentrationwas400mgK91，underthisconcentrationthegerminationandtheseedvigoroftheturfgrassWerebetterthanthecontl01Moreovertherootlengtgthenumberoffibreandtherootwe

6、ightWerealsobettorthanthecontr01《3)曩地rareearthelementc翹iumcouldenhancethedroughtresistanceoftorfgrassWhentheconcentrationwas500mgKg“‘，theactivitiesofSOD，PODCAT鉀瓣allenhanced，theprolinecontentwasincreased，theMDAcontentWasl

7、owerandthewaterpotenfialoftheturfgrasshadnonsignificantchangeMoreovertheceriolncouldenhancethephotosynthesisandthewaterutilizationandnx慨thehurtwhichcalKqcdbydroughtstressAstreatedwithrareearthdementcerinmtheratioott0shoo

8、tphotosyntheticratewaterutilizationefficiencystomatalconductanceandthechlorophyllcontenthadnosignificentdecreaseascomp缸edtothecontr01(4)mabsorptionofmineralelemcntswasincreasedintheturfgrasswhentheturfgrassWas&altwith裁l|

9、eearthelementceriUnLWhenthe300mgL1and600mgL“’ceriumaddedtotheleavestheabsorptionofkMgCaPandothermacroolementWasincreasedaswellasthemicrcelementMnandZnThecontentofmineralelementWasincreaseditcontributetotheosmoticadjustme

10、ntintheplantcellmaintain遨thecellwaterenhancingtheabilityofdroughtresistance(5)Underthedroughtstress，theFv／FmsFv’／Fm’，OPSII，ETRandotherchlorophyllfluorescenceparameteroftheturfgrassWasdecreasedaswel|asthephotochemistryque

11、nchingandtheNonphotochemistryquenchingweresomewhatdecreasedBuLthechlorophyllfluorescenceparameterWasincreasedwhentheturfgrassWastreatedwithrareearthdementceriumandithadalittledropunderthedroughtstressThe載lfeearthelementc