The thin layer of pectin-rich material that cements adjacent plant cell walls together, forming the first layer deposited during cell division. It acts as the glue that holds plant cells together in tissues.
From Middle English 'middel' meaning 'center' and Latin 'lamella' meaning 'thin plate' or 'layer.' The term was established in the late 19th century as microscopy techniques revealed this cementing layer between cell walls.
The middle lamella is like cellular superglue made of natural Jell-O! When you cook vegetables and they get soft, you're actually dissolving this pectin-rich layer - that's why overcooked veggies fall apart at the cellular level.
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