In PLoS Genetics this week, researchers at the Gregor Mendel Institute of Molecular Plant Biology and their colleagues report their "analysis of chromatin structure and RNA transcription at chromosome termini in Arabidopsis." They found telomeric repeat-containing transcripts, some of which "are processed into small interfering RNAs." Telomeric siRNAs promote methylation of asymmetric cytosines in telomeric repeats, contributing to telomeric chromatin maintenance,