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Plant organ development breakthrough
Date:12/4/2012

ingyi Bai, and Stephan Wenkel, from Carnegie, and Patricia Springer from the University of California Riverside.

Their investigations showed that activation of the brassinosteroid pathway represses a group of genes called the cup-shaped cotyledon, or CUC family, which is responsible for organ boundary formation. Using sophisticated techniques the team demonstrated that the protein in the brassinosteroid pathway that is responsible for binding to DNA and, in this case, for inhibiting CUC genes, is present at high levels in the meristem's undifferentiated stem cells and developing organ primordia, but very low in the boundary cells, suggesting that different levels of brassinosteroid activity contribute to the opposite growth behavior of these three types of cells.

"This work links the plant steroids to growth and development, organ boundary development, providing a link between the physiology of the plant and its architectural design," Wang and Barton said.


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Contact: Zhiyong Wang
zywang24@stanford.edu
650-739-4205
Carnegie Institution
Source:Eurekalert

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