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(cell and molecular biology)
The living portion of a cell considered as a unit; includes the cytoplasm, the nucleus, and the plasma membrane.
Plant, fungal, or bacterial cell that has had its cell wall removed.



the contents of a plant cell. The protoplast consists of the cell membrane, cytoplasm, and nucleus but lacks the cell wall.

References in periodicals archive ?
Influence of donor material and genotype on protoplast regeneration in banana and plantain cultivars (Musa spp.
Fertile transgenic rice plants regenerated from transformed protoplasts.
Using chemical or electrical procedures (Jones, 1988) protoplasts from different donor plants can be fused together and somatic hybrids regenerated from the fusion products.
The production of protoplasts creates single cells from pieces of algal thallus and these protoplasts subsequently regenerate into whole plants.
Electroporation is utilized for cell transformation applications, where plasmid DNA is used as the foreign matter to transform bacteria, yeast and plant protoplasts.
The isolation, regeneration and fusion of Phycomyces protoplasts.
In electroporation, plant protoplasts are exposed to a sudden electrical shock that opens up pores in the plant cell and enables DNA to enter.
Cytoplasmic strands connect the protoplasts of adjacent cells, making the living material of the cells continuous within the plant.
With the temptation window, only the serpent may echo the drama; the nudity of the protoplasts is unlikely (various strategies were adopted to overcome this problem, including costumes of white leather).
The extant extrabiblical Adamschriften, as well as other apocryphal or pseudepigraphical compositions that include discussion of the protoplasts and their progeny, are likewise innocent of this narrative event.