A number of transposable elements are activated by environmental stress. A Ty1/copia-type retrotransposon named ONSEN is activated by heat stress in Brassicaceae species. A synthetic activation of the transposon is effective for the molecular breeding without genetic modification. Here, we described the detail procedure of heat treatment to activate ONSEN in Brassicaceae species.
Keywords: Arabidopsis; Brassicaceae; Heat stress; ONSEN; Retrotransposon.