Wounding-Related Signaling Is Integrated within the Auxin-Response Framework to Induce Adventitious Rooting in
Ricardo Castro-Camba1, Jesús Mª Vielba1, Saleta Rico1
1Department of Plant Production, Misión Biológica de Galicia (CSIC), Avda de Vigo s/n, 15705 Santiago de Compostela, Spain.
Genes
|March 28, 2024
Summary
Wounding and auxin treatments are crucial for chestnut adventitious root formation. Simultaneous application of both stimuli optimizes gene expression for successful rooting, aiding vegetative propagation.
Area of Science:
- Plant Biology
- Molecular Biology
- Forestry
Background:
- Adventitious rooting in chestnut microshoots requires wounding and exogenous auxin.
- The specific role of wounding in this process remains uncharacterized.
Purpose of the Study:
- Optimize exogenous auxin treatments for improved shoot health during rooting.
- Investigate early gene expression changes in response to wounding and auxin using time-series transcriptomics.
Main Methods:
- Time-series transcriptomic analysis.
- Comparative gene expression profiling under wounding alone vs. wounding plus auxin.
- Optimization of exogenous auxin treatments.
Main Results:
- Both wounding and auxin influence genes involved in rooting.
- Simultaneous application of wounding and auxin is necessary for optimal gene expression and root development.
- Four transcription factors (CsLBD16, CsERF113, Cs22D, CsIAA6) were identified as upregulated by auxin and/or wounding.
Conclusions:
- Wounding and auxin act synergistically to induce adventitious rooting in chestnut.
- Understanding these early genetic events can improve vegetative propagation protocols for chestnut species.
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