Is lignified cell wall permeable or impermeable?
Lignified walls refers to the condition of cell wall when large amount of lignin is deposited in the cell walls of certain cells.
Lignin is a complex, cross-linked polymer mainly found in plant-cell walls.
It cements together and anchor the cellulose fibres of the cell wall giving it a rigid and woody structure.
It also reduces infection, rot, and decay of the plant as it is among the most chemically inert substances in plants surviving even in fossils of the woody stems.
Upon lignification, cell wall becomes dead and impermeable. Thus, protoplasm has no access to take up solutes.