| 英文摘要 |
The organography and anatomy of the sporeling of Ceratopteris (C. thalictroides and C. pteridoides) are described. Unlike the adult sporophyte which has a greatly reduced stem known as the leafy stem, the sporeling of this fern has an elongated, more or less erect stem with nodes and internodes. It is snggested that light is an important factor affecting the internode elongation. The major parts of the plant body in the sporeling are; primary root, adventitious root, node, internode, hypocotyl, epicotyl, cotyledon, leaf, and terminal bud. The vascular system is extremely simple; only a single strand of vascular tissnes runs through the whole plant body except in the laminum where the bundle forms a network. |
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