The protoplasm of a living plant or bacterial cell whose cell wall has been removed.
- In this plasmolysed cell the protoplast has suffered very intense shrinkage.
- Fibres are often described as cells having no living protoplasts at maturity.
- The hydrostatic pressure model proposes that statocytes detect the total weight exerted by the protoplast on its cell wall.
Late 19th century: from Greek prōtoplastos 'first formed', from prōtos 'first' + plassein 'to mould'.
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