Amoeba ord stock
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Morphological alteration in the mitochondria of Amoeba proteus induced by uncoupling agents
When amoebae are injected with heterologous cytoplasm from another type of amoeba, cellular organelles are segregated and degenerate within membrane-bounded spaces in the host's cytoplasm. In the present study, the role of the nucleus in this response was tested by injecting heterologous cytoplasm from Pelomyxa carolinensis into enucleate and nucleate Amoeba discoides. Samples were prepared for ultrastructural study at intervals between 15 min and 2d after the operation.
In enucleate recipients of heterologous cytoplasm, organelles and cellular debris were observed in vacuole-like spaces indistinguishable in morphology and frequency from those of nucleated recipients. When donor cytoplasm included thoria particles, the electron-dense tracer was found along with degenerating organelles in the vacuole-like structures, confirming the presence there of injected cytoplasm. Changes of comparable magnitude were not observed when either nucleated or enucleated cells were injected with homologous cytoplasm.
The results indicate that nuclear activity is not necessary for the ultrastructurally observable responses of amoebae to heterologous cytoplasm. It is suggested therefore that the cytoplasm possesses a mechanism for recognition of at least some types of heterologous organelles. This is a preview of subscription content, log in to check access.
Rent this article via DeepDyve. Cameron JM, Hawkins SE Inhibition of cell division in amoebae: the incorporation of tritiated precursors into Amoeba proteus after the injection of non-homologous cytoplasm. J Cell Sci — Chalkley HW Stock cultures of ameba. Science Daniels EW Limits of transplantation tolerance in large amoebae. Microfusion studies using Amoeba proteus, Pelomyxa illinoisensis and three strains of Pelomyxa carolinensis.
Protozool — Daniels EW Ultrastructure. In: Jeon KW ed The biology of amoeba. Academic Press, New York, pp — Flickinger CJ The effects of enucleation on the cytoplasmic membranes of Amoeba proteus.
Cell Biol — Flickinger CJ The development of Golgi complexes and their dependence upon the nucleus in amebae. J Cell Biol — Flickinger CJ Cellular membranes of amoeba. Flickinger CJ a Radioactive labeling of the Golgi apparatus by micro-injection of individual amebae. Exp Cell Res — J Protozool — J Cell Sci in press. Jeon KW Micromanipulation of amoeba nuclei. Methods Cell Physiol — Jeon KW Development of cellular dependence on infective-organisms: Micrurgical studies in amoebas.
Science — Int Rev Cytol — Jeon KW, Jeon MS Endosymbiosis in amoebae: recently established endosymbionts have become required cytoplasmic components. J Cell Physiol — Karnovsky MJ A formaldehyde-glutaraldehyde fixative of high osmolality for use in electron microscopy. J Cell Biol. Ord MJ The viability of the anucleate cytoplasm of Amoeba proteus. Download references. The authors are indebted for technical assistance to Mrs.
Christine Folsom-Kovarik, Ms. Kathleen Coogan, and Ms. Ellen Kabana. Reprints and Permissions. Flickinger, C. Capacity of enucleated amoebae to recognize and respond to heterologous cytoplasm. Cell Tissue Res. Download citation. Accepted : 23 May Issue Date : September Search SpringerLink Search. Summary When amoebae are injected with heterologous cytoplasm from another type of amoeba, cellular organelles are segregated and degenerate within membrane-bounded spaces in the host's cytoplasm.
Immediate online access to all issues from Subscription will auto renew annually. Taxes to be calculated in checkout. References Cameron JM, Hawkins SE Inhibition of cell division in amoebae: the incorporation of tritiated precursors into Amoeba proteus after the injection of non-homologous cytoplasm.
Charles J. Read Authors Dr. Flickinger View author publications. You can also search for this author in PubMed Google Scholar. View author publications. Rights and permissions Reprints and Permissions.
About this article Cite this article Flickinger, C.
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When amoebae are injected with heterologous cytoplasm from another type of amoeba, cellular organelles are segregated and degenerate within membrane-bounded spaces in the host's cytoplasm. In the present study, the role of the nucleus in this response was tested by injecting heterologous cytoplasm from Pelomyxa carolinensis into enucleate and nucleate Amoeba discoides. Samples were prepared for ultrastructural study at intervals between 15 min and 2d after the operation.
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