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

2008; Cold Spring Harbor Laboratory Press; Volume: 22; Issue: 10 Linguagem: Inglês

10.1101/gad.463608

1549-5477

Yunhai Li, Leiying Zheng, Fiona Corke, Caroline Smith, Michael W. Bevan,

Lipid metabolism and biosynthesis

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.