Abstract
Flowering plants exhibit two types of inflorescence architecture: determinate and indeterminate. The centroradialis mutation causes the normally indeterminate inflorescence of Antirrhinum to terminate in a flower. We show that centroradialis is expressed in the inflorescence apex a few days after floral induction, and interacts with the floral-meristem-identity gene floricaula to regulate flower position and morphology. The protein CEN is similar to animal proteins that associate with lipids and GTP-binding proteins. We propose a model for how different inflorescence structures may arise through the action and evolution of centroradialis.
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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Androgen-Binding Protein*
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Base Sequence
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Carrier Proteins* / chemistry
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Carrier Proteins* / metabolism
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DNA, Plant
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GTP-Binding Proteins / chemistry
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Gene Expression Regulation, Plant
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Genes, Plant
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Molecular Sequence Data
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Mutation
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Phosphatidylcholines / metabolism
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Phospholipid Transfer Proteins
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Plant Development
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Plant Proteins / chemistry
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Plant Proteins / genetics*
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Plant Proteins / metabolism
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Plants / genetics*
Substances
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Androgen-Binding Protein
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CEN protein, Antirrhinum majus
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Carrier Proteins
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DNA, Plant
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FLO protein, Antirrhinum majus
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Phosphatidylcholines
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Phospholipid Transfer Proteins
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Plant Proteins
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GTP-Binding Proteins