渐尖毛蕨和齿牙毛蕨的配子体发育研究

采用混合土培养渐尖毛蕨和齿牙毛蕨的孢子,显微镜下观察记录了它们的孢子萌发及配子体发育过程.结果表明:两者的孢子均为深褐色,极面观为椭圆形,赤道面观为半圆形,单裂缝;渐尖毛蕨的孢子萌发所需时间较渐尖毛蕨短,但两者萌发类型均为书带蕨型;丝状体阶段均发达;原叶体边缘均可产生少量毛状体;成熟原叶体均呈心脏形;由原叶体发育成幼孢...

Observation on the gametophyte development of Cyclosorus acuminatus and C.dentatus

The spores of Cyclosorus acuminatus and C.dentatus were cultured in the mixed soil.Their spore germination and gametophyte development were observed by microscope.The result shows that spores of both species are dark-brown,monolete,semicircle-shaped in equatorial view and elliptical in polar view.The spores of C.acuminatus germinate faster than those of C.dentatus.Germination of both species is of the Vittaria-type.Filamental stages of both species are developed.Few hairs can occur on margin of the prothalli of both species.The mature prothalli of both species are cordate.Gametophyte developing time from prothalli to sporophytes differs between both species.This paper accumulates detailed information for gametophyte development of Cyclosorus and provides conditions for systematic classification of pteridophyte.