tonoplast


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Related to tonoplast: plasmodesmata

tonoplast

 [ton´o-plast]
the limiting membrane of an intracellular vacuole; the vacuole membrane.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

ton·o·plast

(tōn'ō-plast, ton'ō-),
An intracellular structure or vacuole.
[tono- + G. plastos, formed]
Farlex Partner Medical Dictionary © Farlex 2012

tonoplast

(tō′nə-plăst′)
n.
The cytoplasmic membrane that surrounds a vacuole of a plant cell. Also called vacuolar membrane.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

ton·o·plast

(tō'nō-plast)
An intracellular structure or vacuole.
[tono- + G. plastos, formed]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

tonoplast

the CELL MEMBRANE surrounding the vacuole in the cytoplasm of a plant cell controlling movements of ions into and out of the vacuole. see SELECTIVE PERMEABILITY.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
The keyword ("aquaporin," "major intrinsic protein" "tonoplast intrinsic protein" "plasma membrane intrinsic protein" "small basic intrinsic protein" "nodulin-26-like intrinsic protein," "PIP," "TIP," "NIP," "SIP") searches in the EST annotation identified 1,347 ESTs, while the "water transport" GO expression identified 342 ESTs (Figure 1).
Modulation by Cytosolic Components of Proton Pump Activities in Plasma Membrane and Tonoplast from Cucumis sativus Roots During Salt Stress.
> 700 kD in higher plants, a highly abundant protein making up to 6.5-35% of the total tonoplast protein in different species [4,26,43].
Chrispeels, "The plasma membrane of Arabidopsis thaliana contains a mercury-insensitive aquaporin that is a homolog of the tonoplast water channel protein TIP," Plant Physiology, vol.
Proteomic analysis of plasma membrane and tonoplast from the leaves of mangrove plant Avicennia officinalis.
Abbreviations: AQP, aquaporin; ar/R, aromatic-arginine selectivity filter; Arg, arginine; ATP, adenosine triphosphate; BIB, big brain; Eglp, entomoglyceroporin; Ga, billions of years ago; GIP, GlpF-like intrinsic protein; Glp, aquaglyceroporin; HGT, horizontal gene transfer; HIP, hybrid intrinsic protein; His, histidine; Leu, leucine; LHIP, Lygus hesperus integral protein-like channel; NIP, plant nodulin 26-like integral protein; NPA, asparagine-proline-alanine; NPC, asparagine-proline-cysteine; PIP, plasma membrane intrinsic protein; RPIP, Rhodnius prolixus integral protein-like channel; SIP, small basic intrinsic protein; TIP, plant tonoplast intrinsic protein; TMD, transmembrane domain; Trp, tryptophan; XIP, X intrinsic protein; WGD, whole genome duplication.
It is possible that transport of complexed As (III) or even free As (III) across the tonoplast membrane is a potentially the rate-limiting step in overall arsenic tolerance and accumulation.
The cotton GhNHX1 gene encoding a novel putative tonoplast [Na.sup.+]/H+ antiporter plays an important role in salt stress.
Characterization and expression of plasma and tonoplast membrane aquaporins in primed seed of Brassica napus during germination under stress conditions, Plant Mol.
These authors suggest that a possible dysfunction in the cellular membranes alters the osmotic gradient of the tonoplast.
vacuole: Aqueous cavity within the cytoplasm and surrounded by the tonoplast that stores low molecular weight ions and molecules.