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Sci STKE. 2006 Dec 5;2006(364):cm5.

Arabidopsis brassinosteroid signaling pathway.

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Howard Hughes Medical Institute, Plant Biology Laboratory, The Salk Institute, 10010 N. Torrey Pines Road, La Jolla, CA 92037, USA.


Plants control their size through the action of several phytohormones. One class of growth-promoting hormones is the brassinosteroids (BRs), the polyhydroxylated steroid hormones of plants. Here, we present the Arabidopsis-specific proteins that are the founding members of key BR signaling pathway components found in all plants. The genetic studies that identified these components are unique to Arabidopsis owing to its rapid generation time, sophisticated genetics, and facile transformation protocols, thereby highlighting the importance of a reference plant for understanding fundamental processes in all land plants.

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