Transposable elements and small RNAs contribute to gene expression divergence between Arabidopsis thaliana and Arabidopsis lyrata [RNA-Seq]

ABSTRACT: Transposable elements (TEs) are often the primary determinant of genome size differences among eukaryotes. In plants, the proliferation of TEs is countered through epigenetic silencing mechanisms that prevent transposition. Recent studies using the model plant Arabidopsis thaliana have revealed that methylated TE insertions are often associated with reduced expression of nearby genes, and these insertions may be subject to purifying selection due to their effect on nearby genes. Less is known about the genome-wide patterns of epigenetic silencing of TEs in other plant species. Here, we compare the 24-nt siRNA complement from Arabidopsis thaliana and a closely related congener with a two- to three-fold higher TE copy number, A. lyrata. We show that TEs, and particularly siRNA-targeted TEs,

ORGANISM(S): Arabidopsis lyrata

SUBMITTER: Felix Ott 

PROVIDER: E-GEOD-24571 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress