Overall, the superoxide anion generation rate in control banana fruit increased during storage. The oxalic acid-treated fruit exhibited a significantly (P = 0.05) lower level of superoxide anion generation rate in peel tissues of banana fruit by the end of storage compared with the control fruit ( Fig. 3A). Similarly, the oxalic acid treatment markedly reduced H2O2 content of banana fruit at the later storage ( Fig. 3B). Fig. 3C presents the inhibition of lipid peroxidation of banana fruit by exogenous oxalic acid treatment, which was associated with lower superoxide generation rate and H2O2 content. As ROS can induce the formation of several oxidative byproducts such as MDA ( Duan et al., 2011), imbalance between ROS production and the ROS scavenging capacity enhanced lipid peroxidation and membrane injury, which could account for accelerated fruit ripening and senescence ( Marangoni et al., 1996 and Wang et al., 2004).