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Strigolactone insensitivity affects differential shoot and root transcriptome in barley
Magdalena Korek1, R Glen Uhrig2, Marek Marzec3
1Faculty of Natural Sciences, Institute of Biology, Biotechnology and Environmental Protection, University of Silesia in Katowice, Jagiellonska 28, 40-032, Katowice, Poland.
Journal of Applied Genetics
|June 14, 2024
Summary
Strigolactones (SLs) regulate plant architecture. This study identified SL-dependent genes and transcription factors (TFs) in barley, revealing a complex signaling network controlling plant development.
Area of Science:
- Plant Biology
- Molecular Biology
- Genetics
Background:
- Strigolactones (SLs) are vital plant hormones influencing plant architecture, including shoot and root branching.
- The specific genes and transcription factors (TFs) mediating SL responses in shaping plant architecture are not fully understood.
Purpose of the Study:
- To identify SL-dependent genes and TFs involved in plant architecture regulation in barley.
- To elucidate the gene expression differences in response to SL signaling between root and shoot tissues.
Main Methods:
- Transcriptomic analysis of an SL-insensitive barley mutant (hvd14.d) and its wild-type (WT).
- In silico analysis to identify TFs binding to promoters of differentially expressed genes (DEGs).
- Network analysis to map interactions among identified TFs.
Main Results:
- Over 6,000 SL-dependent genes were identified, with some being tissue-specific.
- 28 TFs were identified that bind to over-represented motifs in DEG promoters.
- A complex interaction network involving nearly half of the identified TFs was revealed, demonstrating intricate SL signaling.
Conclusions:
- This study provides a comprehensive list of SL-responsive genes and TFs in barley.
- The findings highlight the complexity of SL signaling pathways in regulating plant development.
- Understanding these pathways brings us closer to manipulating plant architecture through hormonal control.
