endosymbiosis


Also found in: Dictionary, Medical, Wikipedia.

endosymbiosis

[‚en·dō‚sim·bē′ō·səs]
(ecology)
A mutually beneficial relationship in which one organism lives inside the other.
References in periodicals archive ?
Europe and Canada provided conclusive evidence that all plastids trace their origin to a single primary endosymbiosis.
identifies chlorarachniophyte endosymbiosis as remnants of green algae.
The contract behind the endosymbiosis that produced mitochondria was considered obvious: an energy boost to the host cell in exchange for food and protection for the guest.
Serial Endosymbiosis Theory and the Hierarchy of rps Genes" (PSCF 57, no.
This morphology is hypothesized to be the result of a secondary endosymbiosis in which a green alga was engulfed as prey by a nonphotosynthetic amoeba or amoebaflagellate.
To explain these findings, scientists devised the serial endosymbiosis theory, which essentially holds that primitive microbes evolved into more complex ones by swallowing other microbes and putting them to work as organelles.
No "classification" above precludes a bacterial origin of life (LUCA could have been a primitive bacterium or "pool" of bacteria) or the endosymbiosis of Cyanobacteria resulting in chloroplasts.
Thus, symbioses such as that envisioned in the endosymbiosis model of organelle origination fit within a normal evolutionary paradigm.
Apicoplasts appear to have been acquired by endosymbiosis of a green alga, and they replicate by fission within the cytoplasm of the host cell.
While the endosymbiont theory is the best present answer to the question of eukaryotic cell origins, there is still widespread uncertainty regarding the identity of the original cell that hosted the initial endosymbiosis.
Another entry focuses on the discovery of endosymbiosis by Lynn Margulis in 1967: "Like Copernicus, Galileo, Newton, and Darwin before her, Margulis has uprooted and changed some of science's most deeply held theorems and assumptions.
Buratovich, "The Serial Endosymbiosis Theory: An Important Theory of Cellular Origins, Its Implications and the Potential Contribution of Intelligent Design Theory," PSCF 57, no.