Abstract
Electron microscopy and stereological methods have been used to study the time course and mechanism of mitochondrial genesis in the adult fat body of Calpodes ethlius, (Lepidoptera, Hesperiidae). Most of the larval mitochondria are destroyed during a phase of autolysis shortly before pupation, so that pupal and early adult fat body cells have few mitochondria. The number of mitochondria per cell increases rapidly at the end of the 1st day after the adult emerges. Characteristic partitioned mitochondria appear during the period when the number is rapidly increasing. This evidence, coupled with the results of morphometric analyses of mitochondrial diameter, volume, and surface area, confirms the view that the genesis of adult mitochondria involves the growth and division of mitochondria surviving from the larva.
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Selected References
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