A morphogenetic trigger: is there an emerging concept in plant developmental biology?
Eva Benková1, Maria G Ivanchenko, Jirí Friml
1Department of Plant Systems Biology, Vlaams Instituut voor Biotechnologie, Gent University, Technologiepark 927, 9052 Gent, Belgium.
Trends in Plant Science
|March 17, 2009
Summary
Plant development relies on morphogens for pattern formation. Auxin acts as a morphogen and morphogenetic trigger, guiding tissue patterning and de novo organogenesis by increasing local concentrations.
Area of Science:
- Plant developmental biology
- Molecular and cellular biology
- Biochemistry
Background:
- Morphogens establish positional information crucial for pattern formation.
- Phytohormone auxin exhibits morphogen-like characteristics in plants.
- Auxin gradients are vital for tissue patterning in plant embryos and root apices.
Purpose of the Study:
- To investigate the dual role of auxin as both a morphogen and a morphogenetic trigger in plant development.
- To elucidate the mechanisms by which auxin influences de novo organogenesis.
- To understand the combined action of morphogenetic triggers and morphogens in plant reiterative structures.
Main Methods:
- Analysis of auxin distribution patterns using live imaging techniques.
- Genetic manipulation of auxin biosynthesis and signaling pathways.
- Phenotypic analysis of plant mutants with altered auxin responses.
Main Results:
- Auxin gradients are confirmed to be essential for tissue patterning in embryonic and root development.
- Local increases in auxin concentration act as morphogenetic triggers, inducing new developmental fates.
- Auxin's dual function is critical for de novo organogenesis and the formation of reiterative structures.
Conclusions:
- Auxin functions as both a morphogen and a morphogenetic trigger in plant development.
- The interplay between auxin's roles is essential for complex pattern formation and organogenesis.
- Understanding auxin's dual action provides insights into plant developmental plasticity.
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