論文

国際誌
2022年6月14日

H3K4me3 plays a key role in establishing permissive chromatin states during bud dormancy and bud break in apple.

The Plant journal : for cell and molecular biology
  • Wenxing Chen
  • ,
  • Yosuke Tamada
  • ,
  • Hisayo Yamane
  • ,
  • Miwako Matsushita
  • ,
  • Yutaro Osako
  • ,
  • Mei Gao-Takai
  • ,
  • Zhengrong Luo
  • ,
  • Ryutaro Tao

記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1111/tpj.15868

Bud dormancy helps woody perennials survive winter and activate robust plant development in the spring. For apple (Malus × domestica), short-term chilling induces bud dormancy in autumn, then prolonged chilling leads to dormancy release and a shift to a quiescent state in winter, with subsequent warm periods promoting bud break in spring. Epigenetic regulation contributes to seasonal responses such as vernalization. However, how histone modifications integrate seasonal cues and internal signals during bud dormancy in woody perennials remains largely unknown. Here, we show that H3K4me3 plays a key role in establishing permissive chromatin states during bud dormancy and bud break in apple. The global changes in gene expression strongly correlated with changes in H3K4me3, but not H3K27me3. High expression of DORMANCY-ASSOCIATED MADS-box (DAM) genes, key regulators of dormancy, in autumn was associated with high H3K4me3 levels. In addition, known DAM/SHORT VEGETATIVE PHASE (SVP) target genes significantly overlapped with H3K4me3-modified genes as bud dormancy progressed. These data suggest that H3K4me3 contributes to the central dormancy circuit, consisting of DAM/SVP and abscisic acid (ABA), in autumn. In winter, the lower expression and H3K4me3 levels at DAMs and gibberellin metabolism genes control chilling-induced release of dormancy. Warming conditions in spring facilitate the expression of genes related to phytohormones, the cell cycle, and cell wall modification by increasing H3K4me3 toward bud break. Our study also revealed that activation of auxin and repression of ABA sensitivity in spring are conditioned at least partly through temperature-mediated epigenetic regulation in winter.

リンク情報
DOI
https://doi.org/10.1111/tpj.15868
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/35699670
ID情報
  • DOI : 10.1111/tpj.15868
  • PubMed ID : 35699670

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