Ultrastructure of intracytoplasmic membranes of Methanomonas margaritae cells grown under different conditions |
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Authors: | Kiyoshi Takeda Kenji Tanaka |
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Affiliation: | (1) Fermentation Research Institute, 305, 1-1-3 Yatabe-machi, Ibaraki, Japan;(2) The Institute of Applied Microbiology, University of Tokyo, 1-1-1 Bunkyoku, Tokyo, Japan;(3) Present address: Institute of Medical Mycology, Nagoya University, School of Medicine, Tsuruma 65, Nagoya, Japan |
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Abstract: | The development of intracytoplasmic membranes of Methanomonas margaritae cells grown under different culture conditions was studied. Growth on methane was strongly accelerated by the addition of copper ions. Acceleration by copper, however, was not observed in the case of growth on methanol. Cells grown on methane with copper possessed intracytoplasmic membranes along the cell periphery. When the organism was grown in a medium lacking copper, intracytoplasmic membranes appeared as large vesicles surrounded by a unit membrane at the periphery of the cell. The vesicles originated from paired membranes due to the absence of copper in the medium. Cells grown on methanol with or without copper possessed a number of vesicles of different sizes arranged in a chain along the cell periphery. The possible relationship between membrane arrangement and methane oxidation is discussed. |
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