Abstract
Epigenetic response to stress in plants involves changes in DNA methylation, histone modifications, and expression of small noncoding RNAs (sRNA). Here we present the method of analysis of differential expression of sRNA populations using DNA tiling arrays. sRNA extracted from Arabidopsis thaliana plants exposed to pathogen elicitor or control plants were reverse-transcribed into cDNAs, and subsequently hybridized after labeling to a custom-made DNA tiling array covering Arabidopsis chromosome 4. We first designed a control experiment with eight cDNA clones corresponding to sequences located on chromosome 4 and obtained robust and specific hybridization signals. Furthermore, hybridization signals along chromosome 4 were in good agreement with sRNA abundance as previously determined by massive parallel sequence signature (MPSS) in the case of untreated plants, but differed substantially after stress treatment. These results demonstrate the utility of hybridization to DNA tiling arrays to detect major changes in sRNA abundance.
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Acknowledgments
MB was supported by a Visiting Scientist Fellowship from INRA. VC and DB are members of the European Union Network of Excellence “The Epigenome.”
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Boccara, M. et al. (2017). Analysis of Small RNA Populations Using Hybridization to DNA Tiling Arrays. In: Kovalchuk, I. (eds) Plant Epigenetics. Methods in Molecular Biology, vol 1456. Humana Press, Boston, MA. https://doi.org/10.1007/978-1-4899-7708-3_11
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DOI: https://doi.org/10.1007/978-1-4899-7708-3_11
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