分别用1%、2%壳寡糖(COS)及1%壳聚糖(CTS)对"白花"水蜜桃(Prunus persica)进行涂膜,探索2种涂膜对冷藏[(3±1)℃)]水蜜桃的保鲜效果。结果表明:CTS涂膜对果实呼吸强度的抑制作用较为明显,贮藏过程中没有出现明显的呼吸高峰,且在贮藏10 d后呼吸强度均小于其他组;2%COS涂膜处理可有效保持果实的硬度和可溶性固形物含量,且对抑制果实的相对电导率、丙二醛(MDA)的升高以及多酚氧化酶(PPO)也具有一定的调节作用。

The "baihua" peaches were treated with 1%,2% chitosan oligosaccharide(COS) and 1% chitosan(CTS) respectively at(3±1)℃.The results shows that 1% CTS coating was the most effective to reduce respiratory rate of fruits.No significant respiration peak was detected during the storage and it was lower compared with others method after 10 days of preservation.COS with a 2% coating effectively reduced the decrease of firmness and TSS.This treatment also had good effects on maintaining firmness,inhibiting the increase of relative conductivity,MDA and PPO.The result also indicated that the higher concentration of COS coating,the better effect on the perseveration.However,the best dosage of COS for preservation of peach fruit still needs further research.