An siRNA pathway prevents transgenerational retrotransposition in plants subjected to stress

@article{Ito2011AnSP,
  title={An siRNA pathway prevents transgenerational retrotransposition in plants subjected to stress},
  author={Hidetaka Ito and Herv{\'e} Gaubert and Etienne Bucher and Marie Mirouze and Isabelle Vaillant and Jerzy Paszkowski},
  journal={Nature},
  year={2011},
  volume={472},
  pages={115-119}
}
Eukaryotic genomes consist to a significant extent of retrotransposons that are suppressed by host epigenetic mechanisms, preventing their uncontrolled propagation. However, it is not clear how this is achieved. Here we show that in Arabidopsis seedlings subjected to heat stress, a copia-type retrotransposon named ONSEN (Japanese ‘hot spring’) not only became transcriptionally active but also synthesized extrachromosomal DNA copies. Heat-induced ONSEN accumulation was stimulated in mutants… CONTINUE READING
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