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- Title
Control of leaf morphogenesis by microRNAs.
- Authors
Palatnik, Javier F; Allen, Edwards; Wu, Xuelin; Schommer, Carla; Schwab, Rebecca; Carrington, James C; Weigel, Detlef
- Abstract
Plants with altered microRNA metabolism have pleiotropic developmental defects, but direct evidence for microRNAs regulating specific aspects of plant morphogenesis has been lacking. In a genetic screen, we identified the JAW locus, which produces a microRNA that can guide messenger RNA cleavage of several TCP genes controlling leaf development. MicroRNA-guided cleavage of TCP4 mRNA is necessary to prevent aberrant activity of the TCP4 gene expressed from its native promoter. In addition, overexpression of wild-type and microRNA-resistant TCP variants demonstrates that mRNA cleavage is largely sufficient to restrict TCP function to its normal domain of activity. TCP genes with microRNA target sequences are found in a wide range of species, indicating that microRNA-mediated control of leaf morphogenesis is conserved in plants with very different leaf forms.
- Publication
Nature, 2003, Vol 425, Issue 6955, p257
- ISSN
1476-4687
- Publication type
Journal Article
- DOI
10.1038/nature01958