intracellular symbiosis

intracellular symbiosis

[¦in·trə′sel·yə·lər ‚sim·bē′ō·səs]
(cell and molecular biology)
Existence of a self-duplicating unit within the cytoplasm of a cell, such as a kappa particle in Paramecium, which seems to be an infectious agent and may influence cell metabolism.
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This formation of an intracellular symbiosis from members of two different domains, and the integration of the two inherently incompatible alien genome cultures into a common nucleus, termed "cell symbiosis" by the author, took place 2.
Elysia (= Tridachia) crispata is one of a few species of elysiid sea slugs that has an intracellular symbiosis of several months' duration with chloroplasts acquired from specific, siphonaceous algal food.
Generally speaking, the fungal hyphae in endomycorrhiza penetrate the root cells to establish an intracellular symbiosis, whereas in ectomycorrhiza the hyphae remain extracellular.

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