果实发育过程中SOD活性与MDA含量、细胞膜透性呈负相关，SOD活性高的果实不易裂果。
SOD activity was negatively correlated to MDA content and cell membrane penetrability. Fruits with high SOD activity seldom crack.
此外，角质层细胞、表皮细胞排列紧密，果肉细胞排列较紧密且果肉细胞间空腔较少的枣品种果实较耐裂果。
In addition, closely arranged cuticle cells, epidermis cells, closely arranged pulp cells configuration and less cavum cells jujube fruits are more resistant crack varieties.
果实硬度是关系到口感和果实保鲜期的一个重要指标，与果实抵抗机械损伤、裂果、真菌侵染密切相关。
Fruit firmness is an important index of fruit taste and preservation time, it is closely related to the resistant ability of mechanical damage, fruit cracking and fungal infection.
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