采后褪黑素处理对杏果实成熟的影响  

Effect of postharvest melatonin treatment on ripening of apricot fruit

作　　者：张婷婷[1] 李永才 毕阳[1] 张彦东 胡培芳 王调兰 张苗 ZHANG Tingting;LI Yongcai;BI Yang;ZHANG Yandong;HU Peffang;WANG Tiaolan;ZHANG Miao(College of Food Science and Engineering,Gansu Agricultural University,Lanzhou 730070)

机构地区：[1]甘肃农业大学食品科学与工程学院,兰州730070

出　　处：《中国果树》2019年第1期27-31,共5页China Fruits

基　　金：国家自然科学基金(31460534)

摘　　要：为研究采后外源褪黑素处理对杏果实低温贮藏期间品质及生理的影响,以确定最佳的褪黑素处理浓度,并明确其对杏果实成熟的调控机理,试验以‘兰州大接杏’为材料,采用50～1 000μmol/L褪黑素溶液浸泡杏果实15 min,分析低温[(2±2)℃,相对湿度73%±2%]贮藏期间杏果实乙烯释放量、呼吸强度、硬度、色泽等品质及生理指标的变化。结果表明:不同浓度的外源褪黑素溶液处理均显著提高了杏果实的呼吸强度以及乙烯释放量,贮藏第12 d时,50μmol/L外源褪黑素处理杏果的呼吸强度较对照提高32.8%,同时,贮藏第8 d时,该处理的乙烯释放量为对照的2.2倍;其次,50μmol/L褪黑素溶液处理有效促进了杏果实的软化。此外,褪黑素处理杏果实后有利于提高果实可溶性固形物、可滴定酸含量,有效保持果实抗坏血酸含量。综合来看,50μmol/L外源褪黑素处理可通过提高采后杏果实乙烯释放量和呼吸强度,促进果实成熟,进而加速杏果实最佳食用品质的形成。The effects of exogenous melatonin treatment on the quality and physiology of apricot fruit during low temperature(2±2)℃ storage were studied,to determine the optimal melatonin treatment concentration and to elucidate its regulatory mechanism on apricot fruit ripening.In this experiment,the apricot fruit was soaked with 50~1 000 μmol/L melatonin solution,and the ethylene release amount of apricot fruit during storage at low temperature [(2±2)℃,RH 73%±2%] was analyzed.Changes in quality and physiological indicators such as respiratory intensity,hardness,and chromaticity.The results showed that the treatment of exogenous melatonin solution increased the respiration rate and ethylene release of apricot fruit.The storage intensity of 50 μmol/L exogenous melatonin treated apricot was increased by 32.8% compared with the control,meanwhile,at the 8 th day of storage,the amount of ethylene released from the treatment was 2.2 times that of the control.Secondly,the treatment of 50 μmol/L melatonin solution effectively promoted the softening of apricot fruit.In addition,the treatment of apricot fruit by melatonin significantly increased the content of soluble solids(TSS) and titratable acid,and effectively maintained the ascorbic acid content of fruit tissue.It indicated that 50 μmol/L exogenous melatonin treatment could promote the ripening process of the fruit by increasing the ethylene release and respiration intensity of postharvest apricot fruits,and accelerate the formation of the best edible quality.

关 键 词：杏 褪黑素 果实成熟 贮藏 果实品质 

分 类 号：S662.3[农业科学—果树学]