摘要
采用光镜和扫描电镜对山东分布的蹄盖蕨科2属(蹄盖蕨属和假蹄盖蕨属)7种植物的根、根茎、叶柄、叶轴、叶表皮、表皮毛和孢子囊进行了形态解剖学的系统研究.结果表明,在形态解剖学方面2属植物的共同特征为:根均为无髓中柱;叶柄基部的双柱型维管束向上渐靠近联合形成1个周韧型维管束;叶上下表皮垂周壁均呈波状;气孔主要为胞环型、周胞型或极附型.2属植物的不同特征是:蹄盖蕨属植物体无毛;而假蹄盖蕨属植物叶片和叶轴上均生有腺毛;蹄盖蕨属植物根皮层外侧为薄壁细胞,假蹄盖蕨属则为棕色厚壁细胞环.研究结果表明蹄盖蕨科为一个自然分类群,并支持假蹄盖蕨属的成立.
Light microscopy and scanning electron microscopy were adopted to systematically examine of the morphologies and anatomies of the roots rhizomes, stipe, rachis, leaf epidermis, trichomes, and sporangia of seven species of two Athyriaceae genera （Athyrium Roth. and Athyriopsis Ching）. The results showed that the common features of the plants of the genera are that they have pithless steles in their roots,the U- or V-shaped vascular bundles in their stipe ich gradually combine into amphicribral vascular bundles upwards, the upper and lower epidermises with wavy anticlinal wall in the upper and lower epidermises of their leaves,and actinocytic,anomocytic and polocytic stomata in their leaves. The plants of the two genera differ in that Athyrium plants do not have trichomes and Athyriopsis plants have glandular hairs on their leaves and rachises;Athyrium plants have parenchyma in outer cortex of their roots and Athyriopsis plants have brown scelerenchyma. So these indicate athyriacea is a natural group and support that Athyriopsis is an independent genus.
出处
《西北植物学报》
CAS
CSCD
北大核心
2006年第8期1569-1574,共6页
Acta Botanica Boreali-Occidentalia Sinica
基金
山东省自然科学基金项目(Y95C1335)
关键词
蹄盖蕨属
假蹄盖蕨属
形态解剖学
分类
山东
Athyrium Roth.
Athyriopsis Ching
morphology and anatomy
taxonomy
Shandong
