中国蕨类植物孢子形态的研究Ⅺ.石杉科  

Spore Morphology of Pteridophytes from China Ⅺ. Huperziaceae

作　　者：徐颖[1] 戴锡玲[1] 曹建国[1] 王全喜[1] 

机构地区：[1]上海师范大学生命与环境科学学院,上海200234

出　　处：《西北植物学报》2012年第6期1140-1147,共8页Acta Botanica Boreali-Occidentalia Sinica

基　　金：上海市教育委员会科研创新基金(10YZ73);上海市教育委员会重点学科建设项目(J50401);上海师范大学校理科科研基金(SK201231)

摘　　要：利用扫描电镜对中国产石杉科2属22种植物孢子形态进行了观察,为石杉科分类和系统演化研究提供依据。结果显示:石杉科植物孢子为三裂缝,四面体形,辐射对称;极面观为钝三角形、圆三角形或近圆形;赤道面观为扇形或近椭圆形;石杉属孢子三边向内凹,马尾杉属孢子三边外凸;极轴长为16～26μm,赤道轴长为22～36μm;孢子具外壁,不具周壁,由外壁形成表面穴状纹饰的轮廓,穴为大小、深浅和密度不等的点状近圆形或不规则条状的凹陷。从孢子形态和纹饰类型看,石杉属和马尾杉属属间差异明显,属内差异不明显。The morphology of spores of 2 genera, 22 species of Huperziaceae from China was examined using scanning electron microscope （SEM）. The present investigation provides scientific basis for Huperziaceae classification and system evolution. The results show that the spores, with a trilete, are radially symmetrical and tetrahedron. The spores are often obtuse triangle,rounded triangular or suborbicular in polar view, and fanshaped or nearly elliptic in equatorial view. The three margins of the trilateral spore depress inwards in Huperzia or protrude outwards in Phlegmariurus. The length of polar axis is about 16-26μm. Spore length of equatorial axis is about 22-36μm. The spores possess exospores, but no perispore formation. The exospores form profile of {ossulate ornamentations, which are factually elliptic or irregular pits, with different size, depth and electronic density. From spore morphology and ornamentation types, it is concluded that the discrepancies between the two genera, Huperzia and Phlegmariurus are evident. However, the discrepancies of ornamentations inner each genus are less distinct.

关 键 词：石杉科 孢子形态 蕨类植物 

分 类 号：Q949.36[生物学—植物学]