挂树预贮对‘徐香’猕猴桃采后耐贮性和冷敏性的影响  

Effect of Tree-Hanging Pre-storage on Postharvest Storability and Cold Sensitivity of‘Xuxiang’Kiwifruits

作　　者：屈魏 高萌 冉昪 李欢[1] 舒雪瑶 饶景萍[1] QU Wei;GAO Meng;RAN Bian;LI Huan;SHU Xueyao;RAO Jingping(College of Horticulture,Northwest A&F University,Yangling 712100,China)

机构地区：[1]西北农林科技大学园艺学院,陕西杨凌712100

出　　处：《食品科学》2020年第23期197-204,共8页Food Science

基　　金：“十二五”国家科技支撑计划项目(2015BAD16B03);“十三五”国家重点研发计划重点专项(2016YFD0400102)。

摘　　要：以‘徐香’猕猴桃(Actinidia deliciosa‘Xuxiang’)为试材,正常采收为对照组,不同时间挂树预贮为处理组,将对照果与处理果同条件冷藏,研究挂树预贮对猕猴桃采后耐贮性和冷敏性的影响。结果表明:挂树预贮降低了猕猴桃采收时的硬度和淀粉质量分数,使呼吸峰和乙烯峰出现时间提前,但降低了呼吸峰值。挂树预贮可提高果实采收时的可溶性固形物质量分数,显著降低冷藏过程中的可滴定酸质量分数和出库时的质量损失率(P<0.05),不同程度地缩短货架期,且挂树时间越长,该作用越明显。与其他处理组相比,处理I(挂树预贮1周)组猕猴桃冷藏过程中亮度、出库时VC含量、可食状态下感官得分最高,且均与对照组无显著差异,货架期最长,出库时的冷害率最低,冷藏中后期过氧化氢酶、超氧化物歧化酶活力最高。故挂树预贮1周可有效保持果实耐贮性和品质,降低冷敏性,有利于缓解其采收期和上市集中的压力。To evaluate the effect of tree-hanging pre-storage on the postharvest storability and cold sensitivity of kiwifruits,pre-stored‘Xuxiang’kiwifruits(Actinidia deliciosa)with different tree-hanging times were harvested and cold stored on the same day.Normal fruits stored under the same conditions as above were taken as the control group.The results showed that tree-hanging pre-storage reduced the hardness and starch content of kiwifruits at harvest,and resulted in earlier appearance of the respiratory and ethylene peaks,but reduced the respiratory peak.Tree-hanging pre-storage could improve the content of soluble solids in freshly harvested fruits,significantly reduce the content of titratable acids during storage as well as mass loss at the end of storage(P<0.05),and shortened the shelf life to varying degrees,and the effect was more significant with increasing tree-hanging time.Fruits pre-stored for one week showed higher pulp L*value over the storage period,VC content at the end of storage,and sensory evaluation scores than any other treatment group and was not significantly different from the control group.Moreover,this group exhibited the longest shelf life,lowest chilling injury rate at the end of storage,and the highest catalase(CAT)and superoxide dismutase(SOD)activities.Therefore,tree-hanging pre-storage for one week can effectively maintain the storability and quality and reduce the cold sensitivity of kiwifruits,helping to alleviate the stress of coincidence between harvest and putting on the market.

关 键 词：‘徐香’猕猴桃 挂树预贮 采后品质 冷害 

分 类 号：S663.4[农业科学—果树学]