Interaction of PIN and PGP transport mechanisms in auxin distribution-dependent development
| Autor: | Jiří Friml, Petr Skůpa, Jozef Mravec, Martin Kubeš, Vassilena Gaykova, Suresh Chand, Jan Petrášek, Agnieszka Bielach, Eva Zažímalová, Eva Benková |
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| Rok vydání: | 2008 |
| Předmět: |
Auxin efflux
ATP Binding Cassette Transporter Subfamily B Arabidopsis Organogenesis ATP-binding cassette transporter Biology Models Biological Gene Expression Regulation Plant Auxin heterocyclic compounds Molecular Biology Plant Physiological Phenomena chemistry.chemical_classification Regulation of gene expression Indoleacetic Acids Arabidopsis Proteins fungi Membrane Transport Proteins food and beverages Biological Transport Protein phosphatase 2 biology.organism_classification Cell biology chemistry Efflux Developmental Biology |
| Zdroj: | Development. 135:3345-3354 |
| ISSN: | 1477-9129 0950-1991 |
| DOI: | 10.1242/dev.021071 |
| Popis: | The signalling molecule auxin controls plant morphogenesis via its activity gradients, which are produced by intercellular auxin transport. Cellular auxin efflux is the rate-limiting step in this process and depends on PIN and phosphoglycoprotein (PGP) auxin transporters. Mutual roles for these proteins in auxin transport are unclear, as is the significance of their interactions for plant development. Here, we have analysed the importance of the functional interaction between PIN- and PGP-dependent auxin transport in development. We show by analysis of inducible overexpression lines that PINs and PGPs define distinct auxin transport mechanisms: both mediate auxin efflux but they play diverse developmental roles. Components of both systems are expressed during embryogenesis, organogenesis and tropisms, and they interact genetically in both synergistic and antagonistic fashions. A concerted action of PIN- and PGP-dependent efflux systems is required for asymmetric auxin distribution during these processes. We propose a model in which PGP-mediated efflux controls auxin levels in auxin channel-forming cells and, thus, auxin availability for PIN-dependent vectorial auxin movement. |
| Databáze: | OpenAIRE |
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