外源水杨酸处理对采后杏果实抗冷性的影响

Effect of exogenous salicylic acid on anti-chilling-injury of postharvest apricot fruit

以新疆“塞买提”杏为试材，采收后杏果实用0．01g／L的水杨酸结合减压方式处理，处理后的杏果实置于0℃、RH90％～95％的冷库中贮藏，并以蒸馏水处理的杏果实作为对照，研究采后水杨酸处理对杏果实抗冷性的影响。冷藏期间每隔7d测定杏果实的冷害发病率、冷害指数、硬度、出汁率、膜透性、丙二醛含量。结果表明，采后0．01g/L水杨酸处理能够显著降低杏果实冷害发病率和冷害指数及细胞膜透性和丙二醛含量（p〈0．01）；可有效保持杏果实的硬度与出汁率（p〈0．05）研究结果提示，外源水杨酸处理可以提高杏果实的抗冷性。

Xinjiang apricot fruits ＂Saimaiti＂ were used to investigate effects of 0.01g/L salicylic acid treatment combined with controlled vacuum-infiltration,then stored at 0℃,RH 90%N95%. Apricot fruits treated with distilled water were as the control. The effect of salicylic acid on cold resistance of apricot fruits was studied. Apricot fruit chilling injury incidence,chilling injury index,hardness,juice rate,membrane permeability,MDA content of apricot fruits were determined every 7d. Results showed that postharvest treatment could obviously reduced the chilling injury incidence rate, chilling injury index, permeability, MDA content （p〈0.01） could efficiently keep apricot fruit hardness and juice yield by 0.01g/L salicylic acid（p〈0.05）. Results of the study suggest that,the exogenous salicylic acid treatment could improve the cold resistance of apricot fruit.