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中国蓼属叉分蓼组植物花粉形态的研究.pdf

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维普资讯 植 物 分 类 学 报 40 2【):110~124 (2002) ActaPhytotaxonoraicaSinlca 中国蓼属叉分蓼组植物花粉形态 的研究 周忠泽 陶汉林 班 勤 许‘仁鑫 李‘玉成 (安徽大学 命科学学院 台肥 230039) (中国科 学院植物研究所 北京 100093 Pollen morphology ofPolygonum section Aconogonon M eisn.in China ZHOUZhong.Ze TAOHan.Lin BANQin x‘uRen.Xin L‘IYu.Cheng (hodof£ Science,^ m £ y,He~e[230039) (1~tittaeofBotany.k China~e,tcademyofSc/e~ .Belting1~093) Abstract Pollen morpholo~-of20 species and threevarieties in Potygonum sect.Aconogonon Meisn.(PolygonaceaejinChinawasexaminedunderlightmicroscope(LM)andscnaningeleetmn microscope 【SEM) pollengrainsare3-eolpate,3-colporate,polyplicate,orpantocolpatein shape,20.4~44.0,um ×17.0—34.0 m ,mostlysphemid~ tosubprolate,rarelyoblate—spheroidal OFprolate( E =1o6~1.40j.Theornamentationofexineismicrospinol~se.trfi,- nenflyspinulose,coarselyreticulate,orrugulateunderSEM .Based o11theirfeaturesoftheaper· atresand theexinesculpturing,the pollen grainscanbe divided into 5tpy es,i.e.Aconogonon— type, Campanutatum— pe,Sibiricum—type,Po tachyum—type and Forrestii—type.A keyto the pollentypeswasprovided.111eAconogonon—typeischaracterizedhybeing3-zonocolpateandhaving aTIimperforaterectum with themiemspinulose—foveolateornamentation.Pollen grainsofthistype0c— curin 14speciesnadtwovarieties,ie.P.咖 ne脚 ,P.alpinam,P.an~gust tium,P cathayanum ,P .corlarium ,P divaricatum ,P .hooked,P .1iehiangense,P .tiraosum ,P . rrMle,P.motleviii.frocbc~O$lbtTt,P.molteva~.rude,P.ocreatum,P songaricum,P.ti— beticum ,P .tortttoslzm..
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