Competitive canalization of PIN-dependent auxin flow from axillary buds controls pea bud outgrowth
Language English Country Great Britain, England Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
- MeSH
- Pisum sativum genetics growth & development metabolism MeSH
- Indoleacetic Acids metabolism MeSH
- Gene Expression Regulation, Plant MeSH
- Plant Growth Regulators metabolism MeSH
- Plant Proteins genetics metabolism MeSH
- Plant Stems growth & development metabolism MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Indoleacetic Acids MeSH
- Plant Growth Regulators MeSH
- Plant Proteins MeSH
Shoot branching is one of the major determinants of plant architecture. Polar auxin transport in stems is necessary for the control of bud outgrowth by a dominant apex. Here, we show that following decapitation in pea (Pisum sativum L.), the axillary buds establish directional auxin export by subcellular polarization of PIN auxin transporters. Apical auxin application on the decapitated stem prevents this PIN polarization and canalization of laterally applied auxin. These results support a model in which the apical and lateral auxin sources compete for primary channels of auxin transport in the stem to control the outgrowth of axillary buds.
References provided by Crossref.org
Receptor kinase module targets PIN-dependent auxin transport during canalization
Strigolactones inhibit auxin feedback on PIN-dependent auxin transport canalization
Auxin canalization and vascular tissue formation by TIR1/AFB-mediated auxin signaling in Arabidopsis
WRKY23 is a component of the transcriptional network mediating auxin feedback on PIN polarity
Auxin flow-mediated competition between axillary buds to restore apical dominance
Vascular cambium regeneration and vessel formation in wounded inflorescence stems of Arabidopsis
Cytokinins Are Initial Targets of Light in the Control of Bud Outgrowth
