Effect of Exogenous Melatonin Treatments on the Storage Quality of Dictyophora rubrovolvata

Abstract

In order to explore effect of exogenous melatonin treatments on storage quality of the fresh Dictyophora rubrovolvata, using fresh Dictyophora rubrovolvata as test material, samples were devided into four treatments (CK, 50 μL/L melatonin, 100 μL/L melatonin and 150 μL/L melatonin). The storage temperature was (1±0.5) ℃. Every 3 d, the sensory quality evaluation, rot ratio, respiration rate, malondialdehyde content (MDA), browning degree index, energy metabolism, O2−·generation rate, mass H2O2 fraction and antioxidant capacity were detected. The results showed that the sensory quality of CK, Y1, Y2 and Y3 at 12 d were 2.68, 6.48, 8.52 and 7.28 while rot ratio were 30.48%, 19.29%, 5.48% and 6.99%. Beside that, all the exogenous melatonin treatments could significantly (P<0.05) inhibit the respiration rate, MDA content, browning degree index, O2−· generation rate and mass H2O2 fraction of the fresh Dictyophora rubrovolvata increased, and could maintain the energy metabolism and the antioxidant capacity. These results suggested that exogenous melatonin treatment could inhibit the senescence process and maintain the commodity of the fresh Dictyophora rubrovolvata. Among them, exogenous melatonin at 100 μL/L had the best preservation effect on the fresh Dictyophora rubrovolvata.

Keywords

• dictyophora rubrovolvata
• melatonin
• antioxidant enzyme activitiess
• storage quality