摘要
本文在经典分类基础上,就秦岭地区常见的7种耳蕨属(Polystichum)植物,采用光学显微镜和扫描电子显微镜,对其孢子形态进行了系统的观察。在扫描电镜下,从形态和周壁纹饰上可将孢子分为两种类型:一种是周壁具明显的褶皱,其表面分布稀疏或较密集的小瘤状或小疣状突起,无穿孔;另一种周壁较薄,褶皱具明显穿孔,穿孔大小及形状不一致,周壁表面有颗粒状或小刺状突起。研究表明,孢子形态、周壁纹饰在种间具有明显差异,从而可为本属种间分类提供孢粉学依据。
This paper reports the spore morphology of seven species of Polystichum from the Qinling Range. They were observed by light microscope and scanning electron microscope. The spores show bilateral symmetry and are elliptic in polar view and bean-shaped persemicircular in equatorial view. The polar axis measures 27.37μm, and the equatorial axis 40.98 μm. All the spores fall into the monolete type. Laesurae is 1/2—3/4 of the spore length.According to the morphology and ornamentation of the perine, they can be divided into two groups: one has folded perine forming regulate processes and longer or shorter ridges without perforation, as in P.craspedosorum, P.Platychlomys, P.tsussimense ; the other has folded perine with perforations as in P.neolobatum, P.sinense, P.ezimium and P.shensiense. Surfaces are of scabrate, granulate, tuberculate-verrucate, or spinate ornamentation.It has been found that there exist striking species-to-species differences in terms of spore shape, size and perine ornamentation, thus palynological evidence for classification of this genus is provided.
出处
《西北植物学报》
CAS
CSCD
北大核心
1993年第1期52-56,共5页
Acta Botanica Boreali-Occidentalia Sinica
基金
陕西师范大学校长分析测试基金
关键词
耳蕨属
孢粉形态
孢子
形态
Polystichum, spore morphology, perine ornamentation.
