香鳞毛蕨配子体发育的研究

The development of gametophytes of Dryopteris fragrans

研究了香鳞毛蕨（Dryopteris fragrans（L.）Schot）配子体的发育过程。结果发现孢子极面观为椭圆形，赤道面观为半圆形，单裂缝。孢子萌发为书带蕨型；丝状体2～9个细胞长，有明显顶端细胞，可形成多细胞的广阔板状片状体；片状体顶端分生组织继续分裂，发育为幼原叶体；原叶体发育为三叉蕨型；毛状体数量丰富，均为羊细胞；颈卵器和精子器几乎同时形成，较小；成熟原叶体倒卵状心脏形。该配子体表现为进化性状。

The development of gametophytes of Dryopteris fragrans （ L. ） Schott was studied. The results showed that the spores are monolete, elliotical in polar view and semicircle in equatoral view. The germi nation is of the Vittara-type, and the germ filament developes 2 ~ 9 cells long. The apical ceUs are obvious. Prothallial plate is multicellular plate. Apical meristem still divide and develop to young prothallus. The prothallus is of the Aspidium-type. Quantity of hair is large,and each is unicellular. The antheridia and archegonia are smaller, and seem to develop at the same time. The adult prothallus are cordate-thalloid. It appears that the gametophytes of Dryopterisfragrans （ L. ） Schott possess some evolving characteristics of the fern.