银杏叶生胚珠的发现及其系统意义

马丰山, 李建秀

Ma Feng-Shan, Li Jian-Xiu

Received:1900-01-01 Revised:1900-01-01 Online:1991-03-10 Published:1991-03-10
Contact: Ma Feng-Shan

摘要：

本文报道银杏的短枝叶缘着生胚珠的返祖现象，井结合银杏目的发展史对其系统意义进行了讨论，认为银杏胚珠的叶生性支持了”胚珠由边缘位置(种子蕨亚纲)到次生性顶生位置(银杏目等)转变”的说法。并指出，银杏的”营养叶”具有”孢子叶”的性质；同时支持了顶枝学说。

关键词: 银杏, 叶生胚珠

Abstract:

This paper reports the occurrence of the ovuliferous leaves on a Maidenhair tree

(Ginkgo biloba)growing in Longdong, Yiyuan County, Shandong Province. This phenome-

non is discussed in connection with the history of Ginkgoales. It is believed that this discovery

serves as an illustration of the hypothesis that the secondary apical position of ovules

(Ginkgoales) is a modification of the marginal position (Pteridospermidae). Again, it proba-

bly leads to the assumption that, in Ginkgo, “the foliage leaves” bear some features of “the

sporophylls” and they are derived from telomes.

Key words: Ginkgo biloba, ovuliferous leaf

马丰山, 李建秀. 银杏叶生胚珠的发现及其系统意义[J]. 中国科学院大学学报.

Ma Feng-Shan, Li Jian-Xiu. Ginkgo biloba: The Ovuliferous Leaf and Its Phylogenetic Implication[J]. .

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