The aim of this study was to analyse the effect of nanocomposite packaging material (Nano-PM) on the
physicochemical characteristics and antioxidant capacity of mushrooms (Flammulina velutipes) during
21 days of postharvest storage at 4 C. The results showed that Nano-PM improved retention of nutrients
and inhibited the weight loss, respiration and distinct stipe elongation of mushrooms compared with the
Normal packing material (Normal-PM). Reactive oxygen species (ROS) levels, including superoxide
radical (O2
) and hydrogen peroxide (H2O2), increased during storage. Membrane damage, as measured
by relative electrolyte leakage and malondi-aldehyde (MDA) contents also increased. However, levels of
O2
and H2O2, relative electrolyte leakage and MDA contents were all significantly lower (P < 0.05) in the
Nano-PM group than those in the control group. Nano-PM reduced the production of free radicals which
cause membrane damage and may therefore be an effective treatment to delay the postharvest growth
and caducity in F. velutipes hence increasing its shelf life and at the same time preserving its quality.