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RNA-seq on touch responses in cereals

ABSTRACT: RNA-seq on touch responses in cereals

PROVIDER: PRJEB52944 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR9744290_1.fastq.gz	Fastqsanger.gz
	ERR9744290_2.fastq.gz	Fastqsanger.gz
	ERR9744300_1.fastq.gz	Fastqsanger.gz
	ERR9744300_2.fastq.gz	Fastqsanger.gz
	ERR9744310_1.fastq.gz	Fastqsanger.gz

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Project description:Plants are continuously exposed to environmental triggers, including mechanical stimulation. Our results demonstrate that jasmonic acid (JA)-signalling not only plays a key role in touch-induced developmental changes, but also in the very early gene expression changes. Using multi-omics, we show that the JA-activated transcription factors MYC2/MYC3/MYC4 co-regulate touch-induced gene expression of 266 genes. MYC2/3/4 particularly activate top touch-induced genes, which peak around 25 minutes and then rapidly decline by 40-60 minutes. ChIP-seq shows that MYC2 dynamically binds hundreds of touch-induced promoters within 25 minutes. Furthermore, promoter activation assays confirm that MYC2 directly activates touch-induced promoters. By combining these data, we identified a core MYC2/3/4-dependent ‘touch regulon’, containing many previously-unknown MYC2 targets like bHLH19 and ERF109. bHLH19 can in turn directly activate the ORA47 promoter, indicating that MYC2/3/4 initiate a hierarchical network of downstream transcription factors. Finally, hormone profiling shows that the rapid touch-induced accumulation of JA/JA-isoleucine is directly controlled by MYC2/3/4 in a positive amplification loop regulating JA-biosynthesis genes.

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