tonoplast

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tonoplast

 [ton´o-plast]
the limiting membrane of an intracellular vacuole; the vacuole membrane.

ton·o·plast

(tōn'ō-plast, ton'ō-),
An intracellular structure or vacuole.
[tono- + G. plastos, formed]

tonoplast

(tō′nə-plăst′)
n.
The cytoplasmic membrane that surrounds a vacuole of a plant cell. Also called vacuolar membrane.

ton·o·plast

(tō'nō-plast)
An intracellular structure or vacuole.
[tono- + G. plastos, formed]

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.
References in periodicals archive ?
Potential ESTs from the MIP gene superfamily were identified using the keywords "aquaporin," "major intrinsic protein," "PIP," "TIP," "PIN," "SIP" "plasma membrane intrinsic protein" "tonoplast intrinsic protein," "nodulin-26-like intrinsic protein" and "small basic intrinsic protein" in the EST annotations, or "water transporter" in the GO terms.
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).
Activated SOS2 kinase regulates sodium efflux and sequestration of sodium into the vacuole by activating [Na.sup.+]/[H.sup.+] antiporters of plasma membrane and tonoplast, respectively.