RT Journal Article
SR Electronic
T1 Removal of repressive histone marks creates epigenetic memory of recurring heat in <em>Arabidopsis</em>
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 2020.05.10.086611
DO 10.1101/2020.05.10.086611
A1 Nobutoshi Yamaguchi
A1 Satoshi Matsubara
A1 Kaori Yoshimizu
A1 Motohide Seki
A1 Kouta Hamada
A1 Mari Kamitani
A1 Yuko Kurita
A1 Soichi Inagaki
A1 Takamasa Suzuki
A1 Eng-Seng Gan
A1 Taiko To
A1 Tetsuji Kakutani
A1 Atsushi J. Nagano
A1 Akiko Satake
A1 Toshiro Ito
YR 2020
UL http://biorxiv.org/content/early/2020/05/11/2020.05.10.086611.abstract
AB Acclimation to high temperature increases plants’ tolerance of subsequent lethal high temperatures1-3. Although epigenetic regulation of plant gene expression is well studied, how plants maintain a memory of environmental changes over time remains unclear. Here, we show that JUMONJI (JMJ) proteins4-8, demethylases involved in histone H3 lysine 27 trimethylation (H3K27me3), are necessary for Arabidopsis thaliana heat acclimation. Acclimation induces sustained H3K27me3 demethylation at key HEAT SHOCK PROTEIN (HSP) loci by JMJs, poising the HSP genes for subsequent activation. Upon sensing heat after a 3-day interval, JMJs directly reactivate HSP genes. Finally, jmj mutants fail to maintain heat memory under fluctuating field temperature conditions. Our findings of an epigenetic memory mechanism involving histone demethylases may have implications for environmental adaptation of field plants.Competing Interest StatementThe authors have declared no competing interest.