The Casparian strip in plant roots is a diffusion barrier that directs water and solutes from the soil to the water-conducting tissues. Proteins involved in making the strip have at long last been identified. See Letter p.380
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Grebe, M. Unveiling the Casparian strip. Nature 473, 294–295 (2011). https://doi.org/10.1038/473294a
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DOI: https://doi.org/10.1038/473294a
