摘要
在室内培养条件下，详尽地比较观察了我国东北产的岩蕨科２属４种的配子体发育过程，了解该科在配子体发育上的特征，来说明建立岩蕨科的合理性和种属间的区别。
The deyelopment of gametophytes of Adiantum pedatum L. wassas studied. The spore is tetrahedral, 28.93×42.57u,trilete andobtuse triangular in polar view, semiorbicular in equatorialview,with variously large or small lamellar flat ornamentationsobserved by scanning electron microscope. The pattern of sporegermination is of centripetal type (Momose (1942). Generallythe germ filaments develop 2--5 cells long, uniseriate, some-timesto 7 cells long or multiseriate. The prothallial developmentis of the Adiantum type (Nayar 1971). The prothalli mature in 7--11 weeks after inoculum. Theyare naked and cordate, long obovate or broad obovata, lengthlonger than width, about 5.5×4mm. Thc plants are strictlydioecious. Thc antheridia are long rounded globular, 50.68-55.1u in diameter. They always occur on the margin or sur-face of young prothalli. Its operculum is single. Each antheri-dium contaius about 30--31 spermatozoids, 30--49 flagellated.The archegonia develop on the midrib of matured prothalli.Its neck of is 5--6 celled high and reaches a length of 101.36-131.57u. Vegetative propagation is common in this species. The present work and another paper (Kachroo & Nayar 1953)show that the spore of genus Adiantum is tetrahedral and ger-mination pattern is centripetral,and its sex organs of that arerather large. It implies that these are common primitive char-ateristics of the genus. But the opereulum of antheridium ofAdiantum pedatum is single, while the opcrculum of other speciesit divided (Kachroo & Nayar 1953). If single operculm isanudvanced charater, Adiantum pedatum might be higher evolutionarylevel in this genus.
出处
《植物研究》
CAS
CSCD
北大核心
1998年第4期407-413,共7页
Bulletin of Botanical Research
基金
国家和黑龙江省自然科学基金
关键词
蕨类
配子体
岩蕨科
中国东北
Gametophyte of fern
Woodisiaceae
Northeastern China
