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A cell of a plant, fungus, bacterium, or archaeon from which the cell wall has been removed, leaving the protoplasm and plasma membrane.

[French protoplaste, from Old French, the first man, from Late Latin prōtoplastus, from Greek prōtoplastos : prōto-, proto- + plastos, formed, molded; see -plast.]

pro′to·plas′tic adj.


(Biology) a unit consisting of the living parts of a cell, including the protoplasm and cell membrane but not the vacuoles or (in plants) the cell wall
[C16: from Late Latin prōtoplastus the first-formed, from Greek prōtoplastos, from proto- + plassein to shape]
ˌprotoˈplastic adj


(ˈproʊ təˌplæst)

a. the contents of a cell within the cell membrane, considered as a fundamental entity.
b. the primordial living unit or cell.
2. a person or thing that is formed first; original; prototype.
3. the hypothetical first individual or one of the supposed first pair of a species or the like.
[1525–35; < Late Latin prōtoplastus the first man, n. use of Greek prōtóplastos formed first]
pro`to•plas′tic, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.protoplast - a biological unit consisting of a nucleus and the body of cytoplasm with which it interacts
cell - (biology) the basic structural and functional unit of all organisms; they may exist as independent units of life (as in monads) or may form colonies or tissues as in higher plants and animals
body part - any part of an organism such as an organ or extremity


A first form from which varieties arise or imitations are made:


n (Bot) → Protoplast m
References in periodicals archive ?
Infectivity of MSV has also been abolished due to mutation or deletion of/in CP gene of maize lead to non accumulation of ssDNA particles in protoplast (Boulton et al.
In the recent report group of scientists co-transformed both Cas9 protein and in-vitro SgRNA into plant protoplast and a single mutated protoplast could turn into a fertile homozygous mutant plant via protoplast regeneration without any foreign DNA integration 69.
Cellulases can also be used in protoplast production, medical industry, paper industry, genetic engineering, and pollution treatment (Coughlan, 1985; Mandels, 1985).
Content and vacuole/extravacuole distribution of neutral sugars, free amino acids, and anthocyanins in protoplast.
This first success on protoplast isolation and culture of an Annona sp.
They can be used in experiments involving mutant selection, mass propagation, protoplast isolation, gene transfer, cell biology to study cell wall traits (Mazarei et al.
For mass propagation, mutation induced breeding, somatic embryo genesis, protoplast culture, and cell suspension culture, callus induction is the most vital phase among the in vitro studies on banana.
On the basis of experiment with single, non-statolith containing cells, we developed a new model for plant gravity sensing in which we suggest that the entire protoplast acts as the gravity sensor.