Changes in cytochrome contents and respiratory activity of Bacillus cereus Strain T during germination, vegetative growth and sporulation
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概要
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Vegetative cells of Bacillus cereus Strain T contain cytochrome b-562, a minor b-type component, in addition to kuown components, cytochrome a +a_3, cytochrome b-557 and cytochrome c-551. Also, the spores contain low but definite amounts of cytochromes b-562 and c-551, which were oxidized when the spores were shaken with air. Contents of cytochromes a, b and c per cell and per cell nitrogen, and the activity of glucose oxidation increased during spore germination and elongation. During the stage preceding first cell division, cytochrome contents per cell increased in parallel with the increase of cell nitrogen, while the activity of glucose oxidation decreased. During early exponential growth, the content of cytochrome b per cell nitrogen and respiratory activity with glucose again increased. When cells entered the sporulation stage, characterized by structural changes inside the cells, the activity of glucose oxidation began to decrease, while that of acetate or succinate oxidation started to increase. During the sporulation process, the contents of the three cytochrome components continued to increase and reached the highest level in cells containing completed spores, but the activity of respiration with endogenous or added substrates was negligible in these cells.
- 日本植物生理学会の論文