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Cellular auxin homeostasis: gatekeeping is housekeeping
Michel Ruiz Rosquete1, Elke Barbez, Jürgen Kleine-Vehn
1Department of Applied Genetics and Cell Biology, University of Applied Life Sciences and Natural Resources (BOKU), 1190 Vienna, Austria.
Molecular Plant
|December 27, 2011
Summary
The phytohormone auxin is vital for plant growth. This review explores how auxin metabolism and transport work together to control plant development and maintain cellular auxin levels.
Area of Science:
- Plant Biology
- Molecular Biology
- Biochemistry
Background:
- The phytohormone auxin is critical for diverse plant development processes.
- Auxin's spatio-temporal distribution relies on intricate auxin metabolism and cell-to-cell transport.
- The integration of metabolism and transport in regulating auxin levels remains poorly understood.
Purpose of the Study:
- To review diverse aspects of auxin biology, including biosynthesis, conjugation, oxidation, and transport.
- To highlight the interconnectedness of auxin metabolism and transport.
- To explore how these processes integrate to regulate cellular auxin homeostasis.
Main Methods:
- Literature review of auxin biosynthesis, metabolism, and transport.
- Analysis of the interplay between metabolic pathways and transport mechanisms.
- Discussion of phytohormonal crosstalk and signaling pathways.
Main Results:
- Auxin metabolism and transport are mutually important for plant development.
- These processes are integrated to jointly regulate cellular auxin homeostasis.
- Phytohormonal crosstalk likely coordinates auxin metabolism and transport.
Conclusions:
- Auxin metabolism and transport are essential, integrated processes for plant development.
- The concept of auxin transport components acting as gatekeepers for auxin responses is proposed.
- Further research is needed to elucidate the detailed mechanisms of integration and crosstalk.
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