New plant study reveals a 'deeply hidden' layer of the transcriptome

The image shows a growth-arrested embryo from a mutant Arabidopsis plant that contains a genetic lesion in a gene encoding an essential part of the exosome. The embryo is overlaid on a genome browser image of tiling expression data from an intergenic region that exhibits strong upregulation of a cluster of novel tandem repeat-associated, exosome-regulated transcripts. Credit: Courtesy of Dr. Brian Gregory, Salk Institute for Biological Studies