TYRP1 and infection: Based on these observations, combined with our earlier result that catB and oxyR were transcriptionally induced by H2O2 produced during interaction with rice suspension-cultured cells and also in real time of infection of rice [26, 30], we propose that both CatB and OxyR are required for full virulence and in planta growth of Xoo in rice by detoxification of H2O2.