Abstract
Stress and acclimation responses in plants are mediated by genome-wide changes in gene expression, cellular proteome, and metabolome. In the past years, a significant progress has been made in understanding how epigenetic and smRNA pathways control and orchestrate these changes. Epigenetic marks modify the properties of chromatin and change gene transcriptional states on a scale of the entire genome to a single specific gene. These marks allow for the greater plasticity and adaptability of plant genomes to changing environmental conditions. As DNA methylation is well recognized as an epigenetic mechanism that largely controls stress-induced changes in the plant transcriptome, the crucial role of changes in chromatin structure and levels of small RNAs (smRNAs) becomes more apparent. In this chapter, we summarize and discuss recent advances in understanding dynamic changes that occur in plant chromatin and smRNA populations during exposure to stress. Where possible, we provide experimental evidence supporting direct contributions of these changes to stress acclimation and plant survival.
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Acknowledgment
We thank Valentina Titova for proofreading the manuscript. Research in IK lab is funded by NSERC Discovery, NSERC Strategic, and Alberta Agricultural Research Institute. We declare no conflict of interest.
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Boyko, A., Kovalchuk, I. (2013). Epigenetic Regulation of Genome Stability in Plants in Response to Stress. In: Grafi, G., Ohad, N. (eds) Epigenetic Memory and Control in Plants. Signaling and Communication in Plants, vol 18. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-35227-0_3
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