Abstract:Silencing of transposable elements (TEs) drove the evolution of numerous redundant mechanisms of transcriptional regulation. Arabidopsis MBD5, MBD6, and SILENZIO act as TE repressors downstream of DNA methylation. Here we show via single-nucleus RNA-seq of developing male gametophytes that these repressors are critical for TE silencing in the pollen vegetative cell, which undergoes epigenetic reprogramming causing chromatin decompaction to support fertilization by sperm cells. Instead, other silencing mutants … Show more
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