珠芽蓼的开花结实与胎生繁殖

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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