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Genome-wide analysis reveals phytohormone action during cassava storage root initiation
Punchapat Sojikul1, Treenut Saithong, Saowalak Kalapanulak
1Department of Biotechnology, Center for Cassava Molecular Biotechnology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand, punchapat.soj@mahidol.ac.th.
Plant Molecular Biology
|June 30, 2015
Summary
Phytohormones regulate cassava storage root development. Gene expression and transcription are key during transitions, with phytohormone-related transcription factors playing a crucial role in initiation.
Area of Science:
- Plant Biology
- Molecular Genetics
- Agricultural Science
Background:
- Cassava storage root development involves a shift from cell division to radial growth and reserve accumulation.
- Understanding gene regulation during early storage root development is crucial but remains incomplete.
Purpose of the Study:
- To investigate gene regulation during the initiation and early stages of cassava storage root development.
- To identify key transcription factors and gene networks involved in this process.
Main Methods:
- Differential transcription profiling of fibrous, intermediate, and storage roots using microarray analysis.
- Clustering analysis of significant genes and transcription factors (TF).
- Phytohormone treatment to induce storage root initiation and analyze gene expression patterns.
Main Results:
- Transcription and gene expression are critical during the transition from fibrous to intermediate roots.
- Homeostasis and signal transduction influence the transition from intermediate to storage roots.
- Phytohormone-related TFs are differentially expressed, forming a regulatory network. MeAGL20 may be important in early initiation.
Conclusions:
- Phytohormones act in concert to regulate the onset of cassava storage root development.
- A model is proposed for the relationship between KNOX1 and phytohormones in storage root initiation.
- Specific genes and pathways are identified as critical for storage root initiation.
