褐藻類オキナウチワの形態と胞子発生の研究

概要

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1. Morphological and embryonal studies in Padina japonica Yamada are dealt with in the present paper. 2. The plant of the species is classified into three parts according to its morphological characters, the fan-shaped part, the stem and the postrate rhizome; each part is explained in detail. 3. Existence of prostrate rhizome is a new record for the species. This species is included in the rhizomatous form. 4. Both O_<KAMURA>'s Dilophus radicans and B_<OERGESEN>'s Vaughaniella rupicola are nothing but the prostrate rhizome of P. japonica. 5. This species is dioecious. 6. Culture observations of the tetraspore mother-cells and the ovums have been made. 7. The tetraspores and the ovums are about the same in size, shape and germining manner. 8. This species has most of its tetraspores discharged as tetraspore mother-cells and then liberated into four spores. 9. The germlings of the tetraspore mother-cells are normal and smooth in growth more than those of the tetraspores or of the ovums, and are powerful against their environment. 10. The well-developed germlings of three spores are morphologically similar to the prostrate rhizomes of the parent plant. 11. We have considered that the germlings of this species may develop themselves into filamentous rhizomes, fan-shaped thalli being then produced from them.
日本植物分類学会の論文
1962-01-30