Abscisic acid‐dependent histone demethylation during postgermination growth arrest in Arabidopsis

• DOI: 10.1111/pce.13547
• Publication Date: 2019-03-12T07:04:09Z
• Authors: Jinfeng Wu; Yasunori Ichihashi; Takamasa Suzuki; Arisa Shibata; Ken Shirasu; Nobutoshi Yamaguchi; Toshiro Ito
• Keywords: Histone Methylation

After germination, seedlings undergo growth arrest in response to unfavourable conditions, a critical adaptation enabling plants survive harsh environments. The plant hormone abscisic acid (ABA) plays key role this arrest. To growth, ABA-dependent transcription factors change gene expression patterns flexible and reversible manner. Although the control of has important roles arrest, epigenetic mechanisms ABA are not fully understood. Here, we show that histone demethylases JUMONJI-C domain-containing protein 30 (JMJ30) JMJ32 ABA-mediated Arabidopsis thaliana. During postgermination stage (2-3 days after germination), factor ABA-insensitive3 (ABI3) activates JMJ30 ABA. then removes repressive mark, H3 lysine 27 trimethylation (H3K27me3), from SNF1-related kinase 2.8 (SnRK2.8) promoter, hence SnRK2.8 expression. encodes ABI3 is responsible for JMJ30- JMJ32-mediated A feed-forward loop involving factor, JMJ demethylases, fine-tunes phase. Our findings highlight importance mediating environment.