瀕危植物矮沙冬青生殖生物學(xué)研究.pdf

1、塔里木大學(xué)碩士學(xué)位論文瀕危植物矮沙冬青生殖生物學(xué)研究姓名：焦培培申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：果樹學(xué)指導(dǎo)教師：李志軍20070601AbstractWiththeaidoffieldobservation，paraffintechniques，madseedPropagation，thereproductivebiologyofAmmopiptanthusnQnu$Chengfincludingthebiologicalcharacters，

2、floweringphenologysexualreproduction，pollinationbiologyandseedgerminationcharacterwellstudied，themainresultsinthispaperwereasfollows：(I)Ammopiptanthus㈣Chengfisamonoelinousplankduringbloomingthestigmaisalwayshigherthanant

3、hertoavoidselfpollinatingitsroot，stem，leafflower’fruit，andseedhavesomemorphologicalcharacteroranatomiccharactertoadapttoexistingandreproduction(2)Themeanfloweringlongevityofsinglefloweris674I23d，Themeanfloweringlongevity

4、ofsingleinflorescenceis833263dthemeanfloweringlongevityofindividualis188d_263dd，thefloweringlongevityofwholepopulationaddupto24dItflowersoverlongperiodsandwithalowfloweringsynchronismTheflowersmainlydistributedinupperpar

5、tofbranchingsprays(3)Ammopiptanthusnanu$Chengfpropagatethemselvesmainlybyseed，withoutvegetativereproductioninfieldobservation，shouldbeatypeofobligatesexualreproductionThestigmaandantherallspaceseparated，thesingleflowerha

6、sgreatcapacityofpollenwhichis1847x105perflowerHomogamouselementaryjudgeditsbreedingsystemisoutcrussWithalowrelativereproductivesuccess，andalowsettingpercentageinnaturalconditions，ithasthephenomenonofgreatmanyflowersbutli

7、ttlefruitsThematurefruitsandseedsdistributedmainlybygravitation，andalsocallbedistributedbyexternalforceanddistributedagain(4)Thepollencankeepitsvigorforalongtime，evenstoreatroomtemperaturefor10d，italsohaveavigorpollenper

8、centageofnear50‰thestigmacarlbefertilizedin08dafterflowerThepeal(ofanthersendingitspollenisfrom14：00to18：00insunnydaywhilefrom12：00to15：00andfrom16：00t019：00incloudydayPollinatedbyinsectsandCallbedispersedforalongdistanc

9、e，wiaddispersodisslightlyitshortofvisitinginsectthepeakofthevisitationofthemainpollinatorsisfrom13：00tel6：00insunnydaywhileincloudydayithasnoobviouslypeakThemainpollinatorsarebees(5)TheseedofAmmopiptanthasPlanu$ChengCiso

10、rthodoxseed，withahigllpercentageofhardseeds，ithasaimposeddormancybecauseofseedcoatrestrainingitcallbestoreatrOOmtemperatureforalongtime，StOreatlowtemperaturein5“CCankeeptheseedvigocDuringtheseedgermination，ithascertainab

11、ilityofsalt—toleranLthecriticaIconcentrationofNaClsalttolerantiS03mol，Landlethalconcentrationis06mol／LYoungsproutgrowingslowandwithalowconversionfromseedtoyoungsproutKeywords：AmmopiptanthusnaTnl$Chengf，breedingsystem，pol