In conclusion, upon M. oryzae infection, silencing of CSD1 and CSD2 by miR398b results in higher H2O2 concentrations associated with higher total SOD activity and greater resistance to infection; silencing of SODX leads to higher H2O2 concentrations accompanied by higher activity of both CSDs and SODs, whereas silencing of CCSD leads to lower H2O2 concentrations associated with lower activity of CSDs, which in turn triggers higher expression of other SODs. This evidence concerns the gene SOD1 and infection.