Endosymbiosis in amoebae: Recently established endosymbionts have become required cytoplasmic components
Article first published online: 4 FEB 2005
Copyright © 1976 Wiley-Liss, Inc.
Journal of Cellular Physiology
Volume 89, Issue 2, pages 337–344, October 1976
How to Cite
Jeon, K. W. and Jeon, M. S. (1976), Endosymbiosis in amoebae: Recently established endosymbionts have become required cytoplasmic components. J. Cell. Physiol., 89: 337–344. doi: 10.1002/jcp.1040890216
- Issue published online: 4 FEB 2005
- Article first published online: 4 FEB 2005
- Manuscript Accepted: 2 MAR 1976
- Manuscript Received: 19 DEC 1975
A strain of large, free-living amoeba that became dependent on bacterial endosymbionts which had infected the amoebae initially as intracellular parasites, was studied by micrurgy and electron microscopy. The results show that the infected host cells require the presence of live endosymbionts for their survival. Thus, the nucleus of an infected amoeba can form a viable cell with the cytoplasm of a noninfected amoeba only when live endosymbionts are present. The endosymbiotic bacteria are not digested by the host amoebae and are not themselves used as nutritional supplement. While the host amoebae are dependent specifically on the endosymbionts, the latter can live inside amoebae of different strains, indicating that their dependence on the host cells is not yet strain specific.