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Middle lamella

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Definition

noun

A pectin-rich intercellular material that glues the adjacent cells together.


Supplement

This part of cell wall is the outermost layer found in between cells. It is rich in pectin that cements the primary cell walls of adjacent cells together. It renders stability, and form plasmodesmata between cells. It is also the first layer which is deposited at the time of cytokinesis.


Word origin: L. lamella, a thin plate or scale.

Compare: primary cell wall, secondary cell wall.
See also: cell wall.