Abstract: RNA directed DNA Methylation (RdDM) is a process by which 24-nt small interfering RNAs (siRNAs) initiate and maintain asymmetric DNA methylation in plant genomes, mostly at euchromatic transposable elements (TEs). 24-nt siRNAs produced from a small number of loci (siren loci) are abundant in maternal reproductive tissue (ovule and developing seed coat). It was recently demonstrated that 24-nt siRNAs produced in the Arabidopsis tapetum can methylate TEs and protein-coding genes in trans. Here we show that a similar process takes place in Brassica rapa ovule tissue, directed by siren siRNAs.
This is a live in-person presentation in Marley 230. 
Online attendance is available on Zoom: https://arizona.zoom.us/j/83941552191 password: spls2022 
Refreshments prior to the start of the presentation will be from 3:30 p.m. - 4:00 p.m. in the Marley lobby