Recently, mRNA levels of some ERF genes, including seven kiwifruit ERFs, two petunia ERFs, and two longan ERFs, decreased during ripening or senescence (Yin et al., 2010; Liu et al., 2011; Kuang et al., 2012). However, the mechanism of these ripening-downregulated ERFs involved in ripening was not studied. Therefore, this study chose to investigate what was considered to be the two most ripening-related banana ERF genes (MaERF9 and -11) and their possible role in banana fruit ripening, including the mechanism of their action.