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Chromatin Immunoprecipitation Assay for the Identification of Arabidopsis Protein-DNA Interactions In Vivo
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Autopolyploidization-Induced Chromatin Remodeling Regulates Leaf Size Variation in Brassica rapa
Haoyuan Dong1,2, Yanhong Liu2, Yuanming Liu1
1College of Horticulture, State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Vegetable Germplasm Innovation and Utilization of Hebei, Collaborative Innovation Center of Vegetable Industry in Hebei, Hebei Agricultural University, Baoding, Hebei, 071000, China.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|December 3, 2025
Summary
Whole-genome duplication reshapes plant chromatin and gene expression, driving trait evolution. Ploidy changes alter chromatin accessibility and transcription factors, impacting leaf development and informing crop improvement.
Area of Science:
- Plant biology
- Genomics
- Epigenetics
Background:
- Whole-genome duplication is a key evolutionary driver of trait development.
- The impact of successive genome duplications on genome-wide chromatin and phenotypic innovation is not fully understood.
Purpose of the Study:
- To investigate how genome doubling affects chromatin dynamics, gene expression, and trait differences.
- To elucidate the molecular mechanisms linking ploidy variation to chromatin remodeling and phenotypic divergence.
Main Methods:
- Generated monoploid, diploid, and autotetraploid Brassica rapa lines with an identical genomic background.
- Performed integrative analyses using ATAC-seq, ChIP-seq (H3K4me3, H3K27ac, H3K27me3), and RNA-seq.
Main Results:
- Revealed nonlinear and stage-specific chromatin and transcriptional reprogramming during autopolyploidization.
- Demonstrated that increased ploidy alters chromatin accessibility, with reduced proximal and expanded distal regions, especially during the monoploid-to-diploid transition.
- Identified transcription factors BrGRF13 and BrARF11 as crucial regulators of leaf size and polarity.
Conclusions:
- Ploidy variation drives chromatin remodeling and phenotypic divergence.
- Genome duplication shapes plant traits through epigenetic modifications and altered gene regulation.
- Findings inform strategies for polyploid crop improvement.
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