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Plant stems and roots orient themselves with respect to directional illumination and gravity by differential growth on either side of the organ. A model formulated in the 1930s proposed that tropic growth curvature arose from growth hormone redistribution. Studies with Arabidopsis are beginning to reveal the mechanism.


Journal article


Curr Biol

Publication Date





R452 - R454


Arabidopsis, Arabidopsis Proteins, Biological Transport, Gravitropism, Indoleacetic Acids, Plant Roots