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KMID : 0364219730160010043
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Korean Journal of Zoology
1973 Volume.16 No. 1 p.43 ~ p.53
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Electron Microscopical Study on Mitochondrial Changes of Flight Muscle with Aging in a Butterfly, Pieris rapae L.
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Kim Chang-Whan
Kim Woo-Kap
Lee Bong-Hee
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Abstract
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The flight muscles in Pieris rapae have been examined to study ultrastructural changes in mitochondria with aging. All the mitochondira of flight muscle from the butterfly are recognized as type A which has the simple folded cristae and light matrix, and type B which possesses the complex multicristae and dense matrix. In just newly emerged butterflies both A and B type mitochondria are almost equally present. About ten days after emergence the type A mitochondria rapidly decrease, compared with the type B. In ten-day-old butterflies the type B mitochondria vary in ultrastructure with age. Ultrastructural changes of these aged mitochondria are supposed to occur, in part, by reorganization of inner membranes into myelin-like structures which represent the phase of degeneration of the B type with age. Age-dependent increase in size and number of concentric rings in myelin-like whorl are also found. Glycogen particles penetrated from the cytoplasmic matrix of the muscle cell into the mitochondrial matrix to be in the center of their concentric rings.
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