Plasmodesmata are channels that connect plant cells. They function by:

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Plasmodesmata are channels that connect plant cells. They function by:

Plasmodesmata create direct cytoplasmic connections between plant cells, forming a continuous cytoplasm that spans through the cell wall. Each channel is lined by a plasma membrane and contains a desmotubule from the endoplasmic reticulum, with a surrounding cytoplasmic sleeve that allows movement of small molecules, ions, signaling factors, and even some RNAs and proteins between neighboring cells. This symplastic pathway enables coordinated functioning of tissues and tissues-wide communication. They are not about linking the extracellular matrix or providing animal-type desmosome adhesion, and they do not store starch. Starch is stored in plastids, while the extracellular matrix and adhesion structures in plants involve different components like the cell wall matrix and middle lamella.

Plasmodesmata create direct cytoplasmic connections between plant cells, forming a continuous cytoplasm that spans through the cell wall. Each channel is lined by a plasma membrane and contains a desmotubule from the endoplasmic reticulum, with a surrounding cytoplasmic sleeve that allows movement of small molecules, ions, signaling factors, and even some RNAs and proteins between neighboring cells. This symplastic pathway enables coordinated functioning of tissues and tissues-wide communication.

They are not about linking the extracellular matrix or providing animal-type desmosome adhesion, and they do not store starch. Starch is stored in plastids, while the extracellular matrix and adhesion structures in plants involve different components like the cell wall matrix and middle lamella.

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