<I>Arabidopsis thaliana</I> (IMAGE)

Salk Institute

<I>Arabidopsis thaliana</I>

Caption

Upon sensing the threat of shade from a neighboring plant, Arabidopsis thaliana plants rapidly elongate different tissues by increasing the levels of growth-promoting hormones. This growth is regulated by the VAS1 enzyme. As seen in the photo on the right, plants lacking VAS1 have an exaggerated response to shade.

Credit

Courtesy of the Salk Institute for Biological Studies

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