Research on physicochemical properties, microscopic characterization and detection of different freezing-damaged corn seeds.

According to the results, it can be seen that the activity results of SOD, CAT and AMS are the lowest under normal conditions, with the activity of 981.492 U/g, 19.507 U/g, and 1.310 U/g respectively; The activity changes of SOD, POD and AMS showed a trend of first increasing and then decreasing, reaching the maximum at −10 °C, 10 h, which were 1358.467 U/g, 57.407 U/g, and 2.466 U/g, respectively; The activity of CAT showed a gradually increasing trend, reaching the maximum at −20°C,10 h, with the activity of 41.474 U/g; Although the change of POD activity showed a trend of increasing first and then decreasing, a relatively low activity was obtained at −20 °C for 10 h.

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