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Missing piece of plant clock found
Date:3/18/2009

mostly likely to be part of a clock: the ones that cycle between abundant and scarce.

Of those cyclical proteins, only CHE stuck specifically to the part of plant DNA that controls a critical component of the morning loop. Further experiments demonstrated that CHE also binds to an evening loop protein providing the missing link.

Pruneda-Paz and his co-authors "solve a major puzzle in our understanding of the plant clock," wrote C. Robertson McClung, professor of biology at Dartmouth College, in a commentary on the article that will appear in the same issue of Science.

Evidence increasingly points to the clock as a critical component of functions growth and the timing of flowering. A recent paper published in Nature by a group at the University of Texas, Austin reports that an altered clock contributes to hybrid vigor, suggesting that targeting clock genes may be a way to improve the growth of crops. "It's going to be a way to come up with rational design for increasing yield in the field," Kay said.

Kay expects the growing catalog of transcription factors to be completed by the end of the year with more than 2,000 entries, he said. "This is going to be a significant resource for the plant science community developed here at UC San Diego."


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Contact: Susan Brown
sdbrown@ucsd.edu
University of California - San Diego
Source:Eurekalert  

Page: 1 2

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