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ID:40794409
大小:11.88 MB
页数:77页
时间:2019-08-07
《高级植物生理学课件第七章植物的生殖生理》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、1PlantReproductionZichaoMao2Lifecycleofplant3TransitiontoreproductionFlowerorgandevelopmentGametogenesisandfertilizationPlantReproduction4TransitiontoreproductionVegetativephaseReproductivephase?InflorescenceFlower5Productionofflowersinvolvestwotransitionsin
2、ArabidopsisSC:stemcellP:organprimordiaSe:sepalConvertSAM(ShootApicalMeristem)toinflorescencemeristem(infinite,makinglateralorgans)2.Convertinflorescencemeristemtofloralmeristem(terminal,flowers)6FactorsregulatingthetransitionsVegetativemeristemInflorescencem
3、eristemFloralmeristemGenes(flowering-timegenesandfloralidentitygenes)Light(photoperiod)ThebiologicalclockTemperatureHormones7affectingthetransitionofvegetativegrowthtoreproductivegrowthWTemf2Flowering-timegenesemf1embryonicflower8affectingformationofinflores
4、cenceandfloralmeristemsFloralidentitygenesInflorescence(fromInflorescencemeristem)Flower(fromFloralmeristem)9terminalflower1(tfl1):Converttheinflorescencemeristemtotheflowermeristem.leafy(lfy):producemoreinflorescences,delayedfloweringMutationsinfloralidenti
5、tygenestfl1[FUNCTION]Controlsinflorescencemeristemidentityandisrequiredformaintenanceofaindeterminateinflorescence.Preventstheexpressionof'APETALA1'and'LEAFY'.Alsoplaysaroleintheregulationofthetimeoffloweringinthelong-dayfloweringpathway.Mayformcomplexeswith
6、phosphorylatedligandsbyinterferingwithkinasesandtheireffectors]Expressedbelowtheapicaldomeofinflorescenceandcoflorescencemeristems,andininflorescencestem.Weaklyexpressedinvegetativephasefromday2orday3.Increasedexpressionaftercommitmenttofloweringfromday7on.L
7、EAFY;LFY,FUNCTIONSIN:chromatinDNAbinding,transcriptionfactoractivity,sequence-specificDNAbinding;INVOLVEDIN:flowerdevelopment,maintenanceofinflorescencemeristemidentity,responsetogibberellinstimulus,gibberellicacidmediatedsignaling;LOCATEDIN:nucleus;EXPRESSE
8、DIN:shootapex,leafwhorl,embryo,flower,seed;EXPRESSEDDURING:7growthstages;12FactorsregulatingthetransitiontoreproductionVegetativemeristemInflorescencemeristemFloralmeristemEMFTF1LFY13GarnerandAl
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