A Phylogenetic Consideration on the Vascular Plants, Cotyledonary Node Including Hypocotyl Being Taken as the Ancestral Form : A Preliminary Note

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概要

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• 1. The phylogeny map is the 4th-dimensional extension of a protoplast in which the generations repeated continuously. One generation in the phylogeny is the three-dimensional extension of the protoplast in certain period which is limited by a resting stage accompanying the reproductive phase. 2. It is considered that the ancestor of the seed plants was a hygrophytic multinuclear thallus having the structure like the cotyledonary ring including the hypocotyl in the plants of the present age. 3. In the second stage of the development in the phylogeny the thallus became uninuclear multicellular one, and the water storage cells differentiated in the body which gave the aerophytic habit for the plant. 4. Aerophytic habit gave the great change to the plant not only morphologically but also in the physiological natures. The epidermis having stomata differentiated. The mesophyll became to serve for the photosynthesis instead of the epidermis. The arrest of the escape of the metabolites from the surface of the body, the accumulation of the photosynthetic products, and the evaporation of water from the body surface lead the differentiation of conductive tissues, the phloem and xylem. 5. The transfer of the nutrients and also the metabolites, especially such as the activator of the nuclear division, influenced to differentiate the secondary meristem. The growing point of the root and the primordium of the first node of the stem including the leaves and internode produced from the meristems. The embryo and bud formation are considered. 6. The appearance of the bud lead the formation of the complicated reproductive organ called the flower. The qualitative differences between the MiSI, and MaSI, and the migration of the SI were considered. 7. The ancestor of the Pteridophyte must be entirely different from that of the seed plants. It was a uninuclear multicellular plant having the growing point at the distal end of the body.

• お茶の水女子大学の論文

著者

• 保井 コノ

  Botanical Laboratory Faculty Of Science Ochanomizu University

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• A Phylogenetic Consideration on the Vascular Plants, Cotyledonary Node Including Hypocotyl Being Taken as the Ancestral Form : A Preliminary Note

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