An auxin-dependent distal organizer of pattern and polarity in the Arabidopsis root.
Root formation in plants involves the continuous interpretation of positional cues. Physiological studies have linked root formation to auxins. An auxin response element displays a maximum in the Arabidopsis root and we investigate its developmental significance. Auxin response mutants reduce the maximum or its perception, and interfere with distal root patterning. Polar auxin transport mutants affect its localization and distal pattern. Polar auxin transport inhibitors cause dramatic relocalization of the maximum, and associated changes in pattern and polarity. Auxin application and laser ablations correlate root pattern with a maximum adjacent to the vascular bundle. Our data indicate that an auxin maximum at a vascular boundary establishes a distal organizer in the root.
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Related Subject Headings
- Transcription Factors
- Plant Roots
- Plant Proteins
- Morphogenesis
- Models, Biological
- Membrane Transport Proteins
- Indoleacetic Acids
- Genes, Reporter
- Gene Expression Regulation, Developmental
- Developmental Biology
Citation
Published In
DOI
EISSN
ISSN
Publication Date
Volume
Issue
Start / End Page
Related Subject Headings
- Transcription Factors
- Plant Roots
- Plant Proteins
- Morphogenesis
- Models, Biological
- Membrane Transport Proteins
- Indoleacetic Acids
- Genes, Reporter
- Gene Expression Regulation, Developmental
- Developmental Biology