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Journal of Electron Microscopy 25(4): 261-269 (1976)
© 1976 Oxford University Press

Electron Microscope Studies of the Vegetative Cellular Life Cycle of Chlamydomonas reinhardi Dangeard in Synchronous Culture IV. Mitochondria in Dividing Cells

Tetsuaki OSAFUNE1,2, Sayoko MIHARA2, Eiji HASE2 and Isamu OHKURO1

1Department of Microbiology, Tokyo Medical College Shinjuku-ku, Tokyo, 160 Japan
2Institute of Applied Microbiology, University of Tokyo Bunkyo-ku, Tokyo, 113 Japan

Construction of three-dimensional models of mitochondria in dividing cells of Chlamydomonas reinhardi Dangeard from consecutive sections revealed their complex structures and a characteristic mode of separation of larger mitochondria into smaller and simpler forms. The larger mitochondria seemed to be composed of rod-shaped bodies connected with bands or plates which gave dumbbell-shaped profiles on sections. These rods were separated from each other by fracture of the connecting material and subsequently cut into smaller pieces. It was suggested that during tbe cytokinesis total volume of mitochondria per mother cell remains nearly constant, while the number of mitochondria increases significantly. It was also suggested that mitochondria are apportioned in equal volume among daughter protoplasts.

Received     11 August 1976,
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T Ehara, T Osafune, and E Hase
Behavior of mitochondria in synchronized cells of Chlamydomonas reinhardtii (Chlorophyta)
J. Cell Sci., January 2, 1995; 108(2): 499 - 507.
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