稀土鈰在草坪中的應(yīng)用以及草坪植物抗旱生理生態(tài)響應(yīng).pdf

1、天津師范大學(xué)碩士學(xué)位論文稀土鈰在草坪中的應(yīng)用以及草坪植物抗旱生理生態(tài)響應(yīng)姓名：滕萌申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：植物學(xué)指導(dǎo)教師：多立安20070301天津師范大學(xué)研兜生學(xué)位論文Abska文InordertostudytheeffectsofFareearthelementceriumonthetwotypeofturfgraasLoliumperenneLandFestucaarundinaecakSolnekindsofinstrmne瞧t

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

3、that：(1)n幢seedgerminationandtheseedlinggrowthhadbeenimprovedwhentheseedsWeI“0soakedwiththeceriumfiquorTheoptimumconcentrationofceriumwasbet3Ⅳecn200mgU‘a(chǎn)nd300mgL1Underthisconcentrationextentthegerminationindexandtheseedvi

4、gorofLoliumperenneLandFestucaarundinaceaLWereallincreasedandthebiomasstherootgrowththechlorophyllcontentwe嘴alsobetterthanthecontr01國(guó)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