Chemical transport in plants likened to that of humans

Plant roots and certain human membrane systems resist chemical transport in much the same way, say researchers. This similarity could make it easier to assess chemical risks for both people and plants, and may even lead to a new approach to testing medications. "A plant's root is similar to the blood-brain barrier and intestine of humans," say the researchers. "It's amazing when you think about it -- plants and animals evolved separately but somehow developed comparable structures to control transport of water and dissolved chemicals."

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