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Genes Dev. 2008 May 15;22(10):1331-6. doi: 10.1101/gad.463608.

Control of final seed and organ size by the DA1 gene family in Arabidopsis thaliana.

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  • 1Department of Cell and Developmental Biology, John Innes Centre, Norwich NR4 7UH, United Kingdom. yhli@genetics.ac.cn


Although the size of an organism is a defining feature, little is known about the mechanisms that set the final size of organs and whole organisms. Here we describe Arabidopsis DA1, encoding a predicted ubiquitin receptor, which sets final seed and organ size by restricting the period of cell proliferation. The mutant protein encoded by the da1-1 allele has a negative activity toward DA1 and a DA1-related (DAR) protein, and overexpression of a da1-1 cDNA dramatically increases seed and organ size of wild-type plants, identifying this small gene family as important regulators of seed and organ size in plants.

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