Orestovia and the origin of vascular plants
Orestovia and the origin of vascular plants
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DOI：
10.1111/j.1502-3931.1981.tb01693.x
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发表时间：
1981-10
期刊：
影响因子：
1.5
通讯作者：
V. Krassilov
中科院分区：
文献类型：
--
作者：
V. Krassilov
产于西伯利亚下泥盆统的神秘的Orestovia具有螺旋状和环状管胞的维管圆柱体，皮层中的外部和内部角质层，以及气孔。在皮层表皮之间偶尔保存有丰富的孢子。“网状结构”是半球形纲真菌的分枝。几种类型的孢子被发现粘附在角质层上。Orestovia可以被认为是藻类状的Protosalvinia和有孢子囊的维管植物之间的过渡形式。讨论了陆生植物的起源。
The enigmatic Orestovia from the Lower Devonian of Siberia has a vascular cylinder of spiral and annular tracheids, external and internal cuticles in the cortex, and stomata. Abundant spores are occasionally preserved between the cortex cuticles. The ‘reticulate structures’ are thyriothecia of a hemisphaeriacean fungus. Spores of several types are found sticking to the cuticle. Orestovia can be conceived as a transitional form between the alga-like Protosalvinia and the sporangiate vascular plants. The origin of land plants is discussed.