45366.克隆植物對異質(zhì)性環(huán)境的生態(tài)適應(yīng)對策

1、中國科學(xué)院植物研究所博士學(xué)位論文克隆植物對異質(zhì)性環(huán)境的生態(tài)適應(yīng)對策姓名：于飛海申請學(xué)位級別：博士專業(yè)：植物生態(tài)學(xué)指導(dǎo)教師：董鳴2002.5.1AbstractFeihaiYUDirectedbyProfMingDONGHeterogeneityinspaceandintimeistheubiquitousfeatureofhabitatsAlmostallplantscompletetheirlifehistoriesintempora

2、llyandspatiallyheterogeneousenvironmentsatcertainscalesIntheevolutionaryprocess，plantsmayhaveconstitutedv耐ousadaptivestrategiestocopewithenvironmentalheterogeneityInprinciple，clonalgrowthcontributesmarkedlytotheabilityof

3、clonalplantstomakeuseofenvironmentalheterogeneityInthisthesis，thestrategiesofguerilla—typeclonalplantstoadaptthemselvestoheterogeneousenvironmentsareaddressedusingbothfieldandgreenhouseexperimentsIninlanddunehabitatslike

4、MaowususandlandinnortheasternChinasandburialisacommonepisodeencounteredbyplantsDuetotheunevennessofburialinhorizontalspace，genetorclonalfragmentofclonalplantsoftenincurspartialsandburialInonegreenhouseandtwofieldexperime

5、nts，e脆ctsofclonalintegrationonsurvivalandgrowthoftherametsofthestoloniferousherbPotentillaanserinaandtherhizomatousgrassPsammochloavillosainresponsetosandburialwereinvestigatedTheresultsshowthatclonalintegrationgreatlyen

6、hancedthesurvivorshipoftheburiedrametsofbothspeciesCostbenefitanalysisshowsthattherametsofPanserinawhichsurvivedsandburialbenefitedsignificantlyfromclonalintegration，whiletheirconnectedunburiedrametsdidnotincuranycost，SO

7、thatthegrowthofthewholeclonalfragmentsofPanserinawasenormouslyenhancedItis，therefore，concludedthatckonalintegrationisoneoftheadaptivestrategiesfoTclonalplainstomanagelocalstresscausedbysandburialinsanddunehabitatsTwogree

8、nhouseexperimentswereconductedtostudyclonalplasticityofthestoloniferousclonalherbHalerpestesruthenicainresponsetolightintensitynutrientavailabilityandsalinityLightintensitynutrientavailabilityandsalinityallhavesignifican