Abstract: Activity and characteristics of superoxide dismutase (SOD) in an adductor were determined in yesso scallopPatinopectenyessoensisexposed to chilled dry storage with oxygen packaged(CDo) and air packaged(CDa) at 4 ℃， and ambient dry storage with air packaged (ADa) at 20 ℃ to explore the quality mechanism of post-harvest live scallop and metabolic suppression during live dry storage. High mortality due to hypoxia and higher temperature were observed in the scallop in group ADa, while prolonged survival period was found in the scallop exposed to chilling treatment in group CDo. During chilling exposure, the water-soluble protein content of the adductor was decreased slightly, and SDS-PAGE showed that the protein nearby the ovalbumin (44 000) was to some extent degraded. There was higher activity of SOD in the scallop adductor in group ADa than that in groups CDo and CDa, higher in group CDa than that in group CDo, though the SOD activity was shown to be increased in all groups during the dry storage. SOD activity was found to be heat stable in adductor of the scallop at heat-stable temperature of 60 ℃ and inhibited by Cu2+， Zn2+， Fe3+， SDS， citric acid and H2O2. However, the SOD activity was promoted at low concentration of Mn2+and inhibited at high concentration of Mn2+. The findings indicate that there is correlation between the anaerobic stress and the superoxide dismutase activity in live scallop adductor muscle, and that further investigation is required to clarify this mechanism.
2018, Vol. 33 
