Overview of the morphology, anatomy, and ontogeny of Adiantum capillus-veneris： An experimental system to study the development of ferns  

作　　者：Xia LI Yu-Han FANG ji YANG Shu-Nong BAI Guang-Yuan RAO 

机构地区：[1]College of Life Sciences, Peking University, Beijing 100871, China [2]Centre for Evolutionary-Biology and School of Life Sciences, Fudan University, Shanghai 200433, China

出　　处：《Journal of Systematics and Evolution》2013年第5期499-510,共12页植物分类学报（英文版）

基　　金：Acknowledgements This work was supported by the National Natural Science Foundation of China （NSFC, Grant No. 91231105） and the National Key Laboratory of Protein Engineering and Plant Genetic Engineering at Peking University.

摘　　要：Adiantum capillus-veneris L., commonly regarded as a good experimental plant for the study of fern development, is investigated, and its life cycle under laboratory conditions is described. In our study, the life cycle of A. capillus-veneris was completed in lO0 days. Features of spore germination, antheridium and archegonium ontogeny and development, and embryogenesis are investigated. Exosporic gametophytes ofA. capillus-veneris came from spores, and ended with the cordate prothallia. Antheridia and archegonia were generally situated toward the posterior end and the notch of the prothallia, respectively. Sporophyte was also studied with emphasis on leaf morphology and the vascular system. There were vascular bundles ofdictyostele without secondary vascular tissues. Sporogenesis was scrutinized from sporangial initial of a single surface cell to the annulus shedding spores explosively. Our findings provide insight into the life cycle of the leptosporangiate ferns under experimental conditions, and make it possible for A. capillus-veneris to be an underlying model plant for the study of evolutionary and developmental biology.Adiantum capillus-veneris L., commonly regarded as a good experimental plant for the study of fern development, is investigated, and its life cycle under laboratory conditions is described. In our study, the life cycle of A. capillus-veneris was completed in lO0 days. Features of spore germination, antheridium and archegonium ontogeny and development, and embryogenesis are investigated. Exosporic gametophytes ofA. capillus-veneris came from spores, and ended with the cordate prothallia. Antheridia and archegonia were generally situated toward the posterior end and the notch of the prothallia, respectively. Sporophyte was also studied with emphasis on leaf morphology and the vascular system. There were vascular bundles ofdictyostele without secondary vascular tissues. Sporogenesis was scrutinized from sporangial initial of a single surface cell to the annulus shedding spores explosively. Our findings provide insight into the life cycle of the leptosporangiate ferns under experimental conditions, and make it possible for A. capillus-veneris to be an underlying model plant for the study of evolutionary and developmental biology.

关 键 词：Adiantum capillus-veneris ANATOMY FERNS life cycle morphology. 

分 类 号：Q949.36[生物学—植物学] TP273[自动化与计算机技术—检测技术与自动化装置]