ウニの胚発生中のリン酸化合物の量的関係

概要

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The quantitative relationship among various kinds of phosphorus compounds in embryos of the sea urchins, Pseudocentrotus depressus and Hemicentrotus pulcherrimus was observed during the course of development up to the early pluteus stage. When embryos were cultured without any extraneous supply of phosphorus, amounts of total phosphorus in embryos did not change practically in all the stages tested, representing a complete retention of endogenous phosphorus. From the morula to the end of the blastula stage, there occurred a marked decrease in the acid soluble phosphate which amounted, at the beginning of development, to about forty percent of the total phosphorus. Simultaneously, there also occurred a corresponding increase in the amount of total nucleic acid. Moreover, most of the decrease in acid soluble phosphates appears to be due to a reduction in the quantity of charcoal-adsorbable organic phosphates, a group which may be considered as nucleotide in nature. Lipid phosphorus and protein phosphorus showed no significant change during the entire course of development, although a slight decrease in the former occurs at the end of development. In sea urchin eggs, phosphoprotein phosphorus amounts only to less than ten percent of the total phosphorus and is considered not to be a main reservoir of phosphorus for embryogenesis.
社団法人日本動物学会の論文
1963-09-15