Abstract
Diversity in leaf shape is produced by alterations of the margin: for example, deep dissection leads to leaflet formation and less-pronounced incision results in serrations or lobes. By combining gene silencing and mutant analyses in four distantly related eudicot species, we show that reducing the function of NAM/CUC boundary genes (NO APICAL MERISTEM and CUP-SHAPED COTYLEDON) leads to a suppression of all marginal outgrowths and to fewer and fused leaflets. We propose that NAM/CUC genes promote formation of a boundary domain that delimits leaflets. This domain has a dual role promoting leaflet separation locally and leaflet formation at distance. In this manner, boundaries of compound leaves resemble boundaries functioning during animal development.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Amino Acid Sequence
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Aquilegia / genetics
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Aquilegia / growth & development
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Aquilegia / metabolism
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Cardamine / genetics
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Cardamine / growth & development
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Cardamine / metabolism
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Gene Expression Profiling
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Gene Expression Regulation, Plant*
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Gene Silencing
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Genes, Plant*
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Molecular Sequence Data
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Phylogeny
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Pisum sativum / genetics
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Pisum sativum / growth & development
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Plant Leaves / genetics
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Plant Leaves / growth & development*
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Plant Leaves / metabolism
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Plant Proteins / genetics
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Plant Proteins / metabolism
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Plants, Genetically Modified
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Solanum lycopersicum / genetics
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Solanum lycopersicum / growth & development
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Solanum lycopersicum / metabolism
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Solanum tuberosum / genetics
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Solanum tuberosum / growth & development
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Solanum tuberosum / metabolism
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Transcription Factors / chemistry
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Transcription Factors / genetics*
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Transcription Factors / metabolism
Substances
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Plant Proteins
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Transcription Factors
Associated data
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GENBANK/FJ435156
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GENBANK/FJ435157
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GENBANK/FJ435158
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GENBANK/FJ435159
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GENBANK/FJ435160
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GENBANK/FJ435161
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GENBANK/FJ435162
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GENBANK/FJ435163
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GENBANK/FJ435164
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GENBANK/FJ435165
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GENBANK/FJ435166