氧化玉米淀粉和乙酰水杨酸复合涂膜对巴梨果实贮藏性的影响

Effects of oxidized corn starch and acetylsalicylic acid combined coating on storage property of bartlett pear

研究了质量浓度30g/L氧化玉米淀粉和1mmol/L乙酰水杨酸(acetylsalicylic acid,ASA)单独及复合涂膜处理对‘巴梨’果实在低温贮藏期间贮藏特性的影响。结果表明,ASA处理延缓了果实冷藏期间失重率的增加和色调角h°值的下降,对其他生理和贮藏品质无明显影响。氧化玉米淀粉单独和复合涂膜处理均可有效抑制果实低温贮藏期间的呼吸速率,复合涂膜处理还有效地延缓了呼吸高峰的出现并抑制了丙二醛(malondialdehyde,MDA)的积累。此外,氧化玉米淀粉单独和复合涂膜处理均有效延缓了果实失重率的增加和硬度的降低,较好地保持了果实色度,但两处理组果实的可溶性固形物(total soluble solid,TSS)和可滴定酸(titratable acid,TA)含量与对照组无显著差异。其中,复合涂膜处理的果实保鲜效果最优。由此表明,氧化玉米淀粉和ASA复合涂膜处理可作为巴梨采后潜在的处理技术以有效的维持果实品质。

This study investigated the effects of individual and combined coating of 30 g/L oxidized corn starch and 1 mmol/L acetylsalicylic acid(ASA)on the storage property of bartlett pear at 0℃and 85%-90%relative humidity.The results showed that ASA alone delayed the increase in weight loss and decrease in hue angle h°during storage,but it had no significant effects on other indexes.When coated oxidized corn starch individually or in combination with ASA,both treatments effectively delayed the increase in weight loss and decrease in firmness,and maintained the color of peel.Moreover,both treatments inhibited the respiration rate of fruits,and combined treatment effectively delayed the respiration peak and inhibited malondialdehyde accumulation.However,the contents of total soluble solid and titratable acidity had no significant difference from the control.In conclusion,the combined treatment showed the best preservative effect,therefore,oxidized corn starch combined with ASA coating treatment can be used as a potential preservation technology to maintain postharvest quality of bartlett pear.