套袋处理提高‘妃子笑’荔枝果实耐贮性

  对‘妃子笑’荔枝果实进行采前无纺布套袋处理, 采后置于常温、无任何药剂处理和纸皮包装的条件下, 其耐贮性明显优于无套袋对照, 坏果率较低、果皮失水较慢、pH值相对较低。套袋果实果皮的蛋白质含量增多, 过氧化物酶( POD) 活性降低, 但多酚氧化酶( PPO) 活性无明显不同; 果皮蜡质层较对照厚, 海绵状组织有大型薄壁细胞分布。套袋后的变化有利于增强果皮的保水能力和延迟衰老, 从而推迟失水褐变出现的时间, 延长果实的贮藏寿命。

Bagging Improves Storability of ‘Feizixiao' Litchi

This study aimed at clarifying the effect of pre􀀁harvest fruit cluster bagging on post harvest fruit storability. Adhesive􀀁bonded fabric bags were used to cover Feizixiao litchi fruit. The effects were observed under room temperature, without any chemical treatment and paper box packa ging. Higher water content and lower pH value in the pericarp were observed in bagged fruit with reduced fruit decay rate. Fruit bagging was shown to increase protein content and decrease peroxidase ( POD) act ivity in the pericarp. Thicker waxy layer was seen on the exocarp of bagged fruit and larger cells appeared in the spongy tissue of mesocarp. These changes seemed to prevent the pericarp from losing water and subsequent decay, to delay browning process and thus prolong the storage life.