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. 2016 Sep 7;88(3):361–374. doi: 10.1111/tpj.13252

Figure 7.

Figure 7

Model of cis‐ and trans‐regulation of defence gene responsiveness by DNA (de)methylation.

Responsiveness of defence genes can be cis‐regulated via RNA‐directed DNA methylation (RdDM; blue) and/or ROS1‐mediated DNA demethylation (red) of nearby DNA regions, such as transposable elements (TEs; purple). Trans‐regulation of defence genes that are not associated with nearby DNA methylation can be achieved via different mechanisms. Apart from indirect regulation by cis‐controlled regulatory genes (top), chromatin remodellers in the RdDM protein complex can cross‐link with distant genomic regions and influence post‐translational histone modifications at distal genes that are not associated with DNA methylation. Red arrows indicate stimulation of DNA methylation and/or post‐translational histone modifications (blue triangles and circles) by the RdDM complex. Green lines indicate repression of DNA methylation by ROS1, or transcriptional repression by post‐translational histone modifications. The black arrow indicates stimulation of defence gene induction by defence regulatory proteins.