plasmodesmata (sing. plasmodesma) Fine cytoplasmic strands that connect the protoplasts of adjacent plant cells by passing through their cell walls. Plasmodesmata are cylindrical in shape (about 20–40 nm in diameter) and are lined by the plasma membrane of the two adjacent cells. The endoplasmic reticula of the two adjacent cells are connected by a narrower structure, the desmotubule, which runs through the centre of a plasmodesma. Plasmodesmata tend to occur in groups, forming distinct areas called primary pit fields (see pit). They permit the passage between cells of substances including ions, sugars, amino acids, and macromolecules.
plasmodesmata Cytoplasmic (see CYTOPLASM) bridges, lined with a plasma membrane, that connect adjacent cells. At one time they were thought to be confined to plants, but they have now been observed in many animal cells. Almost certainly they provide major pathways of communication and transport between cells.
plasmodesmata Cytoplasmic bridges, lined with a cell membrane, that connect adjacent cells. At one time they were thought to be confined to plants, but they have now been observed in many animal cells. Almost certainly they provide major pathways of communication and transport between cells.
More From encyclopedia.com
Cells , Cells Plants are multicellular organisms composed of millions of plant cells. Although individual cells may differ greatly from each other in mature… Adherens Junction , adherens junction A cell junction that is commonly observed in epithelial (see EPITHELIUM) cells (e.g. those lining the intestine and those in cardia… Cell , Cell The cell is the basic unit of a living organism. In multicellular organisms (organisms with more than one cell), a collection of cells that work… Plasma Membrane , Plasma membranes envelop all plant and animal cells and all single-celled eukaryotes and prokaryotes , separating them from their environments. Struc… Schwann Cell , Schwann cell (neurilemma cell) A cell that forms the myelin sheath of a nerve fibre. Each cell is responsible for a single length of the fibre (calle… Cell Membrane , cell membrane (plasmalemma, plasma membrane, protoplast) A sheet-like membrane, 7.5–10 nm thick, that forms a selectively permeable barrier enclosing…
About this article
All Sources -
Updated Aug 08 2016 About encyclopedia.com content Print Topic
You Might Also Like