(redirected from tonoplasts)
Also found in: Dictionary, Medical.


The membrane surrounding a plant-cell vacuole.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



the membrane that surrounds a cell vacuole, similar in structure to the membranes of the endoplasmic network. Tonoplasts have selective permeability and the capacity for active transport of ions.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
According to the phylogenetic analysis of Johanson and Gustavsson [18], plant aquaporins are classified into four main subfamilies, widely distributed among higher plants: PIPs (plasma membrane intrinsic proteins), TIPs (tonoplast intrinsic proteins), SIPs (small basic intrinsic proteins), and NIPs (26 kDa intrinsic proteins).
Mesophyll cells from both 2x[O.sub.3] - and 2x[O.sub.3]+C[O.sub.2]-treated leaves had disrupted tonoplasts and deteriorated cytoplasm compared with the CF treatment.
The tonoplast [Na.sup.+]/[H.sup.+] antiporter NHXI gene is induced by both salinity and ABA in Arabidopsis (Shi and Zhu, 2002) and rice (Fukuda et al., 1999).