旌节花科及其相关类群花粉形态的研究(英文)  

Pollen Morphology of Stachyuraceae and Related Taxa*

作　　者：韦仲新[1] 金巧军[1] 王红[1] 田欣[1] 陈书坤[1] 

机构地区：[1]中国科学院昆明植物研究所生物地理学与生物多样性开放实验室,云南昆明650204

出　　处：《云南植物研究》2002年第4期483-496,共14页Acta Botanica Yunnanica

基　　金：中国科学院知识创新工程重要方向项目 (KSCXZ sw 10 1A);国家自然科学基金 ( 39870 0 88);云南省自然科学基金 ( 98C0 91M)~~

摘　　要：对旌节花科及其相关类群五桠果科、猕猴桃科、水东哥科、金莲木科、省沽油科和山茶科等 7科 19属 37种花粉进行了光镜 (LM)和扫描电镜 (SEM )的观察和比较。其中有些种类是第一次观察和报道。研究表明 ,上述各科花粉多为近球形至球形 ,少数近扁球形或近长球形。极面观三裂圆形或近三裂圆形。直径 2 0～ 30 (～ 35 ) μm ,但厚皮香亚科和省沽油科银鹊树属Tapiscia的花粉特别小 ,仅 12 5～ 2 0 μm。 3孔沟 ,罕有 3沟或 4孔沟。外萌发孔(沟 )相对地较长而宽 ,内孔多数较发达。花粉外壁纹饰变化大 ,从模糊而粗糙的细突起到皱波状纹饰 ,细孔状纹饰 ,蜂巢状～穴状纹饰 ,穴～网状纹饰 ,网状纹饰和颗粒状纹饰等。从形状、大小、萌发孔类型和外壁纹饰的比较看 ,虽然上述各科花粉均在不同程度上具有一定的相似性 ,但其中以旌节花科、省沽油科和山茶科中厚皮香亚科的花粉具有更多的相似性 ,尤其表现在外壁纹饰特征上。就孢粉学而言 ,也许旌节花科与省沽油科和山茶科中的厚皮香亚科的关系相对地较为密切。不过 ,其孢粉学特征所表现出的亲缘关系似乎不如在分子生物学中所表现出的明显。The pollen grains of 37 species belonging to 19 genera of 7 families, i e., Stachyuraceae, Dilleniaceae, Actinidiaceae, Saurauiaceae, Ochnaceae, Staphyleaceae and Theaceae were examined by light and scanning electron microscopes.Some species were examined by scanning electron microscope or reported for the first time. The result showed that most pollen grains are 3 lobed circular or sub 3 lobed circular in outline in polar view,the shape varies from suboblate to subprolate but most are subspheroidal to spheroidal.The pollen size ranges from 12 5-20?μm in Ternstroemoideae(Theaceae)and Tapiscia (Staphyleaceae) to 20-30(35)?μm in other taxa in diameter.Most pollen grains are 3 colporate,rarely 3 colpate or 4 colporate.Ectoapertures (colpi) are long and wide relatively;endoapertures (ora) are medium developed to well developed commonly.The exine surface can be divided into faintly scabrous,rugulate, punctate,foveolate,reticulate and granulate sculpture types etc.,and the sculpture types are valuable in the delimitation of the families. The comparison of pollen shape,size,aperture type and exine sculpture showed that Stachyuraceae,Staphyleaceae and Ternstroemoideae (Theaceae) are more similar,especially in exine sculpture,for example,the sculpture of Stachyuraceae and Ternstroemoideae (Theaceae ) is punctate to foveolate but that of Staphyleaceae is foveolate to finely reticulte.However, their relationships showed in palynology are not so obvious as showedin molecular biology as reported by Nandi et al .

关 键 词：旌节花科 相关类群 花粉形态 

分 类 号：Q944[生物学—植物学]