Abiotic stress-mediated modulation of the chromatin landscape in Arabidopsis thaliana.

Journal of Experimental Botany
Vivek Kumar RaxwalManu Agarwal

Abstract

Limited information is available on abiotic stress-mediated alterations of chromatin conformation influencing gene expression in plants. In order to characterize the effect of abiotic stresses on changes in chromatin conformation, we employed FAIRE-seq (formaldehyde-assisted isolation of regulatory element sequencing) and DNase-seq to isolate accessible regions of chromatin from Arabidopsis thaliana seedlings exposed to either heat, cold, salt, or drought stress. Approximately 25% of regions in the Arabidopsis genome were captured as open chromatin, the majority of which included promoters and exons. A large proportion of chromatin regions apparently did not change their conformation in response to any of the four stresses. Digital footprints present within these regions had differential enrichment of motifs for binding of 43 different transcription factors. Further, in contrast to drought and salt stress, both high and low temperature treatments resulted in increased accessibility of the chromatin. Also, pseudogenes attained increased chromatin accessibility in response to cold and drought stresses. The highly accessible and inaccessible chromatin regions of seedlings exposed to drought stress correlated with the Ser/Thr prote...Continue Reading

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Citations

Aug 18, 2020·Journal of Experimental Botany·Geraint ParryChristophe Tatout
Jan 30, 2021·Frontiers in Plant Science·Sneha Lata BhadouriyaRajesh Mehrotra
Apr 11, 2021·Physiologia Plantarum·Mukesh Jain, Rohini Garg
May 25, 2021·Physiologia Plantarum·Wai-Shing YungHon-Ming Lam
Nov 14, 2021·Molecular Biology Reports·Md Mahtab RashidR K Gaur

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