Composition and formation of heterochromatin in Arabidopsis thaliana
- 356 Downloads
The term heterochromatin has been applied to both large-scale, microscopically visible chromocentres and small-scale, silent genes located outside chromocentres. This may cause confusion in the interpretation of epigenetic marks for both features. The model plant Arabidopsis thaliana provides an excellent system to investigate composition and function of chromatin states at different levels of organization. In this review we will discuss recent developments in molecular networks underlying gene silencing and the relationship with visible heterochromatin in Arabidopsis.
Key wordsArabidopsis DNA methylation gene silencing heterochromatin
Unable to display preview. Download preview PDF.
- Kanno T, Huettel B, Mette MF et al. (2005b) Atypical RNA polymerase subunits required for RNA-directed DNA methylation. Nat Genet 37: 761–765.Google Scholar
- Libault M, Tessadori F, Germann S, Snijder B, Fransz P, Gaudin V (2005). The Arabidopsis LHP1 protein is a component of euchromatin. Planta DOI: 10.1007/s00425-005-0129-4.Google Scholar
- Nakahigashi K, Jasencakova Z, Schubert I, Goto K (2005) The Arabidopsis HETEROCHROMATIN PROTEIN1 homolog (TERMINAL FLOWER2) silences genes within euchromatic region but not genes positioned in heterochromatin. Plant Cell Physiol DOI: 10.1093/pcp/pci195.7Google Scholar
- Tamaru H, Selker EU (2001) A histone H3 methyltransferase controls DNA methylation in Neurospora crassa. 414: 277– 283.Google Scholar
- The_Arabidopsis_Initiative (2000) Analysis of the genome sequence of the flowering plant Arabidopsis thaliana. Nature 408: 796–815.Google Scholar
- Vaucheret H (2005) MicroRNA-dependent trans-acting siRNA production. Sci STKE 2005: pe43.Google Scholar
- Xie Z, Johansen LK, Gustafson AM et al. (2004) Genetic and functional diversification of small RNA pathways in plants. PLoS Biology 2: e104.Google Scholar