.... 2017). In Arabidopsis, transcriptional activation of some Ty1/copia retrotransposons is triggered by stress, and their retrotransposition rates are enhanced by loss of the 24-nt small RNA pathway
(Mirouze et al. 2009; Ito et al. 2011). In contrast, in ddm1 mutants and wild-type (WT) pollen, most...