凤仙花属总状花序组的种皮微形态观察研究  

Observation Research of the Seedcoat Micromorphology of Impatiens sect. Racemosae

作　　者：张林静[1] 郭慧[1,2] 李晓花[3] 梁同军[3] 张梅[2] 于胜祥[2] 

机构地区：[1]山西师范大学生命科学学院,山西临汾041004 [2]中国科学院植物研究所,系统与进化植物学国家重点实验室,北京100093 [3]江西省·中国科学院庐山植物园,江西九江332900

出　　处：《园艺学报》2016年第8期1545-1554,共10页Acta Horticulturae Sinica

基　　金：国家自然科学基金项目(31170177);国家自然科学基金委重大国际合作项目(31110103911);中国科学院知识创新工程重要方向性项目(KSCX2-EW-Z-1)

摘　　要：应用扫描电镜技术对凤仙花属（Impatiens）总状花序组（sect.Racemosae Hook.f.et Thomson）23种植物的种子进行了观察研究。结果表明：总状花序组植物的种子为椭圆体形、倒卵形和狭卵形;长宽比多在1.4~2.3;种皮表面具网状纹饰和指状隆起两种类型,指状隆起又可分为排列疏松和紧密两类。该组的种皮微形态与宏观形态性状相关性较小,但网眼内是否有颗粒物、指状隆起的排列密度、隆起物上是否有颗粒状附属物或凹陷小孔等特征具有种水平上的稳定性和特异性,对该组植物的种间界定具有重要的意义。In order to study the seedcoat characters and discuss their taxonomic significance,23 species from sect.Racemosae were sampled and investigated under SEM（Scanning Electron Microscope）in this study.The observation results indicated that the seeds of sect.Racemosae were ellipsoid,obovate,and oblong-ovate.The ratios of length to width are mostly between 1.4- 2.3.Two types of micromorphogical character of seed surface were recognized：reticulate ornamentation and digitiform protrusive,and the later could be loosely or tightly digitiform protrusive.The seedcoat micromorphology characters of sect.Racemosae showed limited of correlation with the gross morphological characters.However,seedcoat micromorphological characters,such as granules present or not in the lumina,granules or pits emerge or not on the protrusive,the density of digitiform protrusive,and so on,are consensus within species and have taxonomical value in circumscription of species within sect.Racemosae.

关 键 词：凤仙花属 总状花序组 种皮 微形态 分类学 

分 类 号：S681[农业科学—观赏园艺]