基于多種群尺度三種獨尾草屬植物繁育系統(tǒng)的比較.pdf

1、石河子大學(xué)碩士學(xué)位論文基于多種群尺度三種獨尾草屬植物繁育系統(tǒng)的比較姓名：范俊峰申請學(xué)位級別：碩士專業(yè)：植物學(xué)指導(dǎo)教師：馬淼20080601AbstractInthispaperweobservedthefloweringphonologycharacteristicsofbreedingsystem，flowermorphologycharacteristics，pollinationecologyandthedifferenceofs

2、eedsofthreespeciesofEremurusbasedonscaleoftheirpopulationsThemainrusultswereasfollows：1ThedifferenceoffloweringphenologyamongdifferentpopulationsandinterspecficTheearlyfloweringstageofEanisopterusandEinderiensisamongdiff

3、erentpopulationsweredelayed23daysfromwesttoeastThewholefloweringperiodofinterspecficofEanisopterusandEinder&nsiswerenosignificant，whichwasabout20daysThefloweringperiodofEaltaicusamongdifferentpopulationswereverysignifica

4、nt，Theearlyfloweringstageoftheloweraltitudepopulationwasveryearlierandthewholefloweringperiodlastedveryshorter；Theearlyflowermgstageofthehigheraltitudepopulationwasdelayedabout30days，andthewholefloweringperiodwasmorethan

5、9dayswiththeloweraltitudepopulation，whichindicatesthatitadaptedhighlytodifferenthabitats2PollenvitalityofE。anisopterusandEinderiensisamongdifferentpopulationswereupto95％onaverage，whichwasthelowerintheenvironmentofpolluti

6、onThedifferentpopulationspollenvitalityofEaltaicuswereabout85％inhighaltitude，lowtemperatureAccordingtoCrudensP／Ojudegment，theP／OofthreespeeiesofEremurusisobligatexenogamybutartificialisolationexperimentcouldalsoproducese

7、ed，whichindicatesthattheyareselfcompatibleThemixedbreedingsystemofthreespeeiesofEmmumsisakindofcompromisedmechanismwhichadaptstotheenvironmentalconditionandplantthemselves3Therewerehighlysignificantwiththesingleflowerflo

8、raldisplayofinterspecficThe6tepalsofEanisopterusaxeoutspreadthoroughlyThelower3tepalsarejustlikeaplatformforvisitors，the6anthersstarttodisperseonebyone，thestigmastyle(upwardscurveatanteriorpart)increasesthechancethatitac

9、ceptspollensfromtheantherinthesameflowerandfromthebodyofinsectsInthedesertwithhighdailytemperatures，theumbrellaformedbytheupper3tepalsformasocalledawningforvisitorsWhilethe6tepalsofEinderiensisarenotoutspread，andthe6anth

10、erscomeoutthetepalonebyone，andthenthestigmastylecomeoutthetepalThestigmastyleofEalta&usisupwardatfirst(upward1ststage)，whenthe6tepalscompletelywrappovarythestigmastyleisdownward(downwardstage)，andtheantherstartIodisperse

11、onebyoneWhenthesixanthersarebarethestigmastyleisupwardagain(upward2ndstage)4HeterotypicalmaturationofstaminaofthreespeciesofEremurussignificantlyprolongedthepollen‘dispersionperiodofasingleflowerThedurationofpollendisper

12、sionamongdifferentpopulationsarenosignificant。butinterspecflcaxeverysignificantThesingleantherpollen—dispersionperiodofEanisopteruswasabout40rainComparedwithEanisopterus。Pollen—dispersionperiodofEinderiensisandEaltaicusr