Dynamic changes in genome-wide histone H3 lysine 4 methylation patterns in response to dehydration stress in Arabidopsis thaliana.

H3K4 methylation changes when transcript levels change To determine whether/how stress-altered gene expression correlated with changes in H3K4 methylation, we examined genes whose transcripts increased or decreased by 4-fold or more, and had highly significant p -values (p ≤ 0.001; Additional file 3 , Table S2).

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