contractile vacuole

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contractile vacuole

[kən′trak·təl ′vak·yə·wōl]
(cell and molecular biology)
A tiny, intracellular, membranous bladder that functions in maintaining intra- and extracellular osmotic pressures in equilibrium, as well as excretion of water, such as occurs in protozoans.
References in periodicals archive ?
Amoeba proteus expresses a single AQP that is present in the contractile vacuole complex required for osmoregulation, whereas Dictyostelium discoideum expresses four AQPs, of which two are present in the single-celled amoeboidal stage and two more in the later multicellular stages preceding spore formation.
TcAQP-GFP fusion proteins were localized in the acidocalcisomes of the parasite and in a contractile vacuole close to the flagellar pocket (Montalvetti et al.
Immunofluorescence studies localized ApAQP as uniformly distributed on the contractile vacuole and on surrounding vesicles of A.
A functional aquaporin co-localizes with the vacuolar proton pyrophosphatase to acidocalcisomes and the contractile vacuole complex of Trypanosoma cruzi.