Casparian strip function

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Added: 23.01.2021

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Casparian strip A band of suberin , an impermeable substance, found in the endodermal cell walls of plant roots; it was named after R. Movement of water through the apoplast pathway is diverted from the cell wall to the cytoplasm, where it then follows the symplast pathway. The endodermal cells actively secrete salts into the vascular tissue. This results in a low more negative water potential , allowing water to move down a water potential gradient from the endodermis into the vascular tissue.

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Root diffusion barrier control by a vasculature-derived peptide binding to the SGN3 receptor

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Casparian strip - Wikipedia

Polarized epithelia are fundamental to multicellular life. In animal epithelia, conserved junctional complexes establish membrane diffusion barriers, cellular adherence and sealing of the extracellular space 1. Plant cellular barriers are of independent evolutionary origin. The root endodermis strongly resembles a polarized epithelium and functions in nutrient uptake and stress resistance 2. Its defining features are the Casparian strips, belts of specialized cell wall material that generate an extracellular diffusion barrier 2. The mechanisms localizing Casparian strips are unknown. Here we identify and characterize a family of transmembrane proteins of previously unknown function.

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Casparian strip development and its potential function in salt tolerance

Metrics details. Root systems are critical for plant growth and development. The Casparian strip in root systems is involved in stress resistance and maintaining homeostasis.

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