PLASMODESMATA AND CELL-TO-CELL COMMUNICATION IN PLANTS

Plasmodesmata provide a cytoplasmic pathway for direct cell-to-cell communication in plants. They are highly dynamic in biogenesis and structural modifications, organize cells into symplasmic domains that serve as basic developmental units in a plant, and mediate intercellular trafficking of proteins and nucleic acids as well as small molecules. Intercellular macromolecular trafficking appears to be a significant mechanism of regulating gene expression and physiological functions among neighboring cells and between distant organs. Current data suggest that intercellular macromolecular trafficking is also likely a general function in animals. Evolutionarily, intercellular macromolecular trafficking may be a primitive rather than an advanced biological function.

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