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在低温贮藏条件下,苹果虎皮病从11一12月间开始发生并迅速加重.在此之前,果皮中H_2O_2水平逐渐上升,11—12月达最大值.H_2O_2水平的变化与细胞中保护系统和木质素合成有关.与晚采果相比,早采果中SOD和CAT活性均高,低温下CAT活性较SOD下降为快,早采果尤为显著,因此果皮中H_2O_2水平也高.抗氧化剂二苯胺对SOD和CAT无影响,但显著抑制木质素合成,降低H_2O_2水平,减少发病率.
At low temperature storage conditions, apple tiger skin disease occurred from November to December and rapidly aggravated.At this point, the H_2O_2 level in the peel gradually increased from November to December reached its maximum.H 2 O 2 levels and cell protection system And lignin synthesis.Compared with late-harvesting fruit, the activities of SOD and CAT in early-harvesting fruit were both high, CAT activity was lower than SOD in low temperature, especially in early harvesting fruit, so the level of H_2O_2 in the peel was also high. Diphenylamine had no effect on SOD and CAT, but significantly inhibited the synthesis of lignin, decreased the level of H_2O_2 and reduced the incidence of SOD.