STUDIES ON SUBMICROSCOPIC STRUCTURES OF BACTERIAL CELLS I. ELECTRON MICROSCOPY OF ULTRA-THIN SECTIONS OF BACILLUS ANEURINOLYTICUS

概要

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The internal structure of an aerobic spore-forming bacterium, Bacillus aneurinolyticus has been studied by means of ultramicrotomy accompanied with electron microscopy. A fine reticular structure which suggested the chromonema net-works in the nucleus of the higher organism was observed within the nuclei of cells in a certain stage of development, and an attempt to reveal its behavior during cellular division and the process of sporulation has been made. In the dividing vegetative cells, the reticulum was observed to be made up of rod-like structures, however, its interpretation as being chromosomes had not been ventured. A portion of the reticular structure (nuclear material) of the vegetative cell has been assumed to share a most important role in forming an endospore, the nucleus of which was observed to bear a more granular structure. The internal structure of the developing endospore, turned into a characteristic profile of the spore as it matured. The survival of the reticular structure was also discernible among the disintegrating cellular elements of the sporulating cells. A nucleolus-like osmiophilic granule and a considerable number of cytoplasmic granules which were identified as the oxidative-reductive sites of the cells, were observed.
奈良学芸大学の論文
1959-02-15