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ID:39144285
大小:2.93 MB
页数:62页
时间:2019-06-25
《珠芽蓼的开花结实与胎生繁殖》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、ABSTRACTPolygonumviviparumL.istheviviparousplantwidespreadontheplateau,andalsoisthemainfodderplantofhostinsectforCor@c印ssinensis(Berk.)Sacc.Studyonfloralorgan,morphousoffruit,seedandbulbil,processofflowering,fructificationandseedsetting,bulbilbreedingofP.viviparumbyfieldobservation,
2、paraffinsectionandcultivationinlaboratoryisforexploringthemechanismofviviparity,screeningthesuitableconditionforbulbilbreeding,consummatingthebioresearchofviviparousplant,supportingthedevelopmentandforthputtingofP.viviparum.1.FlowerandfloweringofP.viviparum(1)Typesontheinflorescence
3、ofP.viviparumbythenumberofflowersandbulbilsareallbulbils,fewflowers-muchbulbilsandhalfflowers-halfbulbils.Typesonflowersandbulbilsinthesamebractaletwoflowers,onebulbilandoneflower-onebulbil.Typesonsimpleflowerbythecolorofpefianthareredflowers,lightredflowersandwhiteflowers.(2)Theflo
4、werseasonofPviviparumisfromtheendofMaytotheendofAugust.Twotypesofflowersonsingleirdlorescencebloomintandem,timeinterval17days.Floweringtimeofthefirststagefloweris51-73days.Floweringtimeofthesecondstagefloweris60--79days.Theaveragevalueofpollenvitalityare69.57%and43.73%tothefirststag
5、eflowerandthesecondstageflower.Twotypesflowersbothhavestigmareceptivity.2.FructificationandseedsettingofP.viviparumThecypselaofP.viviparumdevelopfromthree·carpelovary.Theshapeandstructureofthefruitsontwostageflowersarethesame.Therateofseedsettingare43%and29%tothefirststageandtheseco
6、ndstageflower.Seedsettingrateisrelativelylow.3.BulbilandviviparityofP.viviparum(1)Typesonbulbilbycolorandsizearebigpurpleredbulbils,smallpurpleredbulbilsandgreenbulbils.(2)ThebulbildevelopmentseasonofP.viviparumisfromtheendofMaytotheendofAugust.Developmenttimeofbulbilsonsingleinflor
7、escencelast58~72days.I¨Developmenttimeofsinglebulbillast41-53days.AbscissiontimeofbulbilsisfromJulytoAugust.(3)Inthewholewildcoloniaof尸.viviparum,thenumberofbulbilsislargerthannumberofflowers.Thelengthofbulbilsectionis1/2-3/4ofthewholeinflorescence,9/10atmost.Thenumberofbulbilsonsin
8、gleinflorescenceis3
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