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Casparian strip

Casparian strip A band of suberin, an impermeable substance, found in the endodermal cell walls of plant roots; it was named after R. Caspary. 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. The Casparian strip prevents water from returning to the cortex; consequently a positive hydrostatic pressure is established in the vascular tissue – the phenomenon of root pressure.

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Casparian strip

Casparian strip A band of waterproof, corky tissue that is found on the side and walls of the endodermis of roots. The strip prevents water from entering the pericycle except through the cytoplasm of endodermal cells; this may be important in producing root pressure.

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"Casparian strip." A Dictionary of Plant Sciences. . Encyclopedia.com. 8 Nov. 2018 <https://www.encyclopedia.com>.

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"Casparian strip." A Dictionary of Plant Sciences. . Retrieved November 08, 2018 from Encyclopedia.com: https://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/casparian-strip

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