贺兰山特有植物花粉形态特征研究

采用扫描电子显微镜并辅之以光学显微镜 ,分别对 11种贺兰山特有植物的花粉形态进行了观察 ,描述了其大小、形态、表面纹饰、萌发器官类型等特征。根据相关文献资料和野外原始记录 ,记载了这些植物的花期、生境、分布和产地等 。

同一植物群落中基于光学显微镜荧光和亮场成像的花粉形态鉴定:以一个横断山脉高山草甸为例

花粉形态具有物种特异性,是花粉识别的关键属性。花粉的精确识别可为植物分类、物种演化、花粉传递网络等研究提供基础信息。本研究采集了滇西北香格里拉区域高山草甸群落36科92属135个植物物种的花粉,归纳总结了花粉的提取、测量和特征描述方法。首次利用光学显微镜荧光和亮场成像描述花粉的形态特征,并绘制了完备的花粉图像库。本研究使用多重因子分析对花粉形态特征进行了贡献值排序,建立了定距式花粉检索表。本文为区域群落传粉生态学等研究中基础花粉库的建立提供了参考。

苹果属植物苹果组及山荆子组花粉形态及其演化研究

苹果属中苹果组和山荆子组的植物花粉为圆球形，近长球形和长球形，花粉Ｐ／Ｅ值在１．０２６０～１．５２７０之间。三购，极轴走向，沟中央较宽，向两极渐细。萌发孔３个，环列于三沟中央，孔沟属Ｎ＿３Ｐ＿４Ｃ５型。花粉中等大小，长轴在２５μ～３０μ左右。外壁为条网纹、条穴纹及条纹饰，无一定规律。但两组条脊间距、宽度和密度有差异。本研究支持ＬａｎｇｅｎｆｅｌｄｓＶ．将原苹果系Ｓｅｒ．ＰｕｍｉｌａｅＲｅｈｄ．与山荆子系Ｓｅｒ，ＢａｃｃａｔａｅＲｅｈｄ．上升为两个组，但在名称上用苹果组Ｓｅｃｔ．ＭａｌｕｓＬａｎｇｅｎｆ．与山荆子组Ｓｅｃｔ．ＢａｃｃａｔｕｓＪｉａｎｇ（不用脱萼组Ｓｅｃｔ．ＧｙｍｎｏｍｅｌｅｓＫｏｅｈｎｅ）。山荆子组花粉的Ｐ／Ｅ值较苹果组大，因此后者较前者进化。

Pollen Morphology and Ecological Significance of Nine Hygrophyte Species at Sevenstar Lake Area in the Bashang Area of Hebei Province

ObjectiveThis study aimed to investigate the morphological characteristics of pollen from nine hygrophyte species at Sevenstar Lake area in the Bashang Area （the southern edge of Inner Mongolian Plateau） of Hebei Province, as well as their ecological significance. MethodThe pollen morphology of nine hygrophyte species distributed at Seven Star Lake area was observed and studied by using an optical microscope, and morphological characteristics like size, shape, surface ornamentation were recorded. ResultsPollen grains were globose, subglobose prolate spheroidal; germination aperture had five types, namely, 3-groove, 6-groove, 3 （4）-groove, 3-colporate, 3 （4）-colporate; ektexine possessed four kinds of ornamentation： reticulate, striped, spiny, granular. Meanwhile, the environmental indication significance of these nine hygrophyte species was also discussed according to their habitats, origin and distribution. ConclusionThe study provides the basis of modern palynology for the study of ancient environment, ancient vegetation and paleoclimate.