H3K27me3 demethylases alter HSP22 and HSP17.6C expression in response to recurring heat in Arabidopsis

• DOI: 10.1038/s41467-021-23766-w
• Publication Date: 2021-06-09T10:16:45Z
• Authors: Nobutoshi Yamaguchi; Satoshi Matsubara; Kaori Yoshimizu; Motohide Seki; Kouta Hamada; Mari Kamitani; Yuko Kurita; Yasuyuki Nomura; Kota Nagashima; Soichi Inagaki; Takamasa Suzuki; Eng-Seng Gan; Taiko To; Tetsuji Kakutani; Atsushi J. Nagano; Akiko Satake; Toshiro Ito
• Keywords: Demethylase

Acclimation to high temperature increases plants' tolerance of subsequent lethal temperatures. Although epigenetic regulation plant gene expression is well studied, how plants maintain a memory environmental changes over time remains unclear. Here, we show that JUMONJI (JMJ) proteins, demethylases involved in histone H3 lysine 27 trimethylation (H3K27me3), are necessary for Arabidopsis thaliana heat acclimation. induces sustained H3K27me3 demethylation at HEAT SHOCK PROTEIN22 (HSP22) and HSP17.6C loci by JMJs, poising the HSP genes activation. Upon sensing after 3-day interval, JMJs directly reactivate these genes. Finally, jmj mutants fail under fluctuating field conditions. Our findings an mechanism involving may have implications adaptation plants.