両生類の卵形成過程の研究 : VII.イモリ幼若卵母細胞のミトコンドリア形成

概要

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Details are given of the formation of mitochondria which occurs during early stages of oocyte growth in the newt, Triturus pyrrhogaster. Electronmicroscopy of young oocytes of 100-350μ in diameter reveals numerous stacks of flattened cisternae of rough surfaced endoplasmic reticulum in addition to numerous vesicular endoplasmic reticula distributed randomly throughout the ooplasm. As the oocyte grows in size beyond the diameter of 400μ, stacks of the cisternae become less and less to be encountered. The stacked cisternae become filled with intracisternal dense material which seems to have been synthesized under the influence of ribosomes locating on the cisternal membrane. Mitochondria or mitochondrion-like bodies are found to be closely associated with the membrane of flattened cisternae in young oocytes. They show various features: Some with very abortive from containing granular material in their lumen enclosed by single or double membranes and others with the typical form bearing some cristae characteristic of the organelle. As the abortive mitochondria continue to grow, the intracisternal dense material become less and less to be observed. These findings seem to suggest that the synthesis of proteins necessary for the transition from the endoplasmic reticulum to the mitochondrion may occur on the cisternal membrane presumably under the influence of messenger RNA's from the nucleus.
社団法人日本動物学会の論文
1969-06-15