摘要
本文通过光学显微镜和扫描电子显微镜，对东北蒿属植物莳萝组（Ｓｅｃｔ．ＡｂｓｉｕｔｈｉｕｍＤＣ．），艾蒿组（Ｓｅｃｔ．ＡｂｒｏｔａｎｕｍＢｅｓ．），艾组（Ｓｅｃｔ．Ａｒｔｅｍｉｓｉａ），龙蒿组（Ｓｅｃｔ．ＤｒａｕｎｃｕｌｕｓＢｅｓ），牡蒿组（Ｓｅｃｔ．Ａｒｔｍｉｓｉａ）３５种代表植物种皮的形态特征进行了观察。其中瘦果形状多为倒卵形、长圆形及其它变形，但立体构形多有变化。瘦果表皮细胞均有次生加厚：之一是表皮细胞垂周壁和平周壁极度加厚，凸起相互联接构成网状结构；之二是果皮细胞壁次生加厚也比较强烈，在果实的表面形成密集的纵棱轻微的纵向隆起，领细胞的层数和直径也有一些变化。这些微形态学特征在组间存在着某些差异，具有一定的分类学和生态学意义。
The morphology of seed coat from 35 representative species in groups of Sect. Absiuthium DC., Sect. Abrotanum Bess., Sect. Artemisia, Sect. Dracunculus Bess and Sect. Iatilobus Y. R. Ling from Artemisia were observed using both optical microscope and scanning electron microscope. The shape of most achenes was inversely-ovate, lengthened-round or in other variable forms. However, the stereoscopic configuration varied to certain extent. All the epidermal cells of achenes had secondary thickening. First of all, the vertical and the horizontal perines of epidermal cells thickened extremely and they protruded so as to interconnect as netted structure. Secondly, the relatively intensive secondary thickening took place in the cell wall of the seed coat so that the concentrated longitudinal ridges formed on the surface of seed. Certain variations oceurred interms of the diameter and the layer number of the collar cells. The difference in these microstructure characters among groups may be of importance in plant taxonomy and ecology.
出处
《植物研究》
CAS
CSCD
北大核心
1999年第1期111-120,共10页
Bulletin of Botanical Research
基金
哈尔滨师范大学校科研基金
蔡火石生物科学发展基金
关键词
蒿属
种皮形态
种皮微形态
扫描电镜
Artemisia
Morphology and microstructure of seed coat, Scanning electron microscope (SEM)
