Plant materials and growth conditions The A. thaliana Columbia-0 (Col-0) accession of wild type and the ddm1-1 mutant30 were used throughout. The seeds were germinated on a plate of 0.5× or 1× Murashige and Skoog medium. After keeping in dark at 4 °C for 2–3 days, the plants were grown at 22 °C under long-day conditions of 16 h […]