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以半红期采收的赞皇大枣为试材 ,研究低温 (0℃ )对枣软化衰老的生理效应。结果表明 ,0℃低温可明显抑制大枣呼吸 ,维持低水平代谢 ;抑制多聚半乳糖醛酸酶 (PG)活性 ,并抑制其前期果胶甲酯酶 (PE)活性 ,但抑制效果不明显 ;可使枣维持较高的超氧化物歧化酶 (SOD)、过氧化物酶 (POD)活性 ,减少 MDA累积。
Zanhuang jujube collected in half red period was used as experimental material to study the physiological effects of low temperature (0 ℃) on date softening and aging. The results showed that low temperature of 0 ℃ could significantly inhibit the respiration of jujube and maintain the low level of metabolism, inhibit the activity of polygalacturonase (PG) and inhibit the activity of pectin methylesterase (PE), but the inhibitory effect was not obvious ; Jujube can maintain high superoxide dismutase (SOD), peroxidase (POD) activity, reduce MDA accumulation.