摘要
以光照度500 lx、波长670 nm的LED红光对25℃贮藏的4种呼吸跃变型果实(芒果、甜瓜、香梨和猕猴桃)进行连续照射,探究LED红光照射对果实采后后熟的影响。通过测定果实贮藏过程中硬度、呼吸强度、可溶性糖含量、可滴定酸含量、表皮色度值指标的变化,分析不同种类果实对外源红光的后熟响应。结果表明:香梨和芒果对红光为积极响应,与对照组相比,两种果实转色速度加快,果实的硬度和可滴定酸含量显著下降(P<0.05),可溶性糖累积提前,同时呼吸高峰值也显著高于对照组(P<0.05),芒果呼吸高峰较对照组提前4 d出现;甜瓜硬度在贮藏中期出现“回升”变化,LED红光照射显著减缓了其可溶性糖的累积和可滴定酸的分解(P<0.05),其果皮在贮藏期间出现“褪白”现象;猕猴桃对LED红光不产生响应。综上可知,LED红光照射可显著促进采后香梨和芒果着色及后熟,而对猕猴桃和甜瓜的后熟和表皮色素累积无促进作用。
In this study,four kinds of fruits(mangos,melons,pears and kiwifruits)stored at 25℃were continuously irradiated with red LED light with intensity of 500 lx and wavelength of 670 nm,and the effects of LED illumination on fruits postharvest ripening were explored.Besides,the post-ripening responses of different fruits to exogenous red light were analyzed by measuring the changes of hardness,respiration intensity,soluble sugar contents,titratable acid contents and peel color qualities during storage process.The results showed that the pears and mangos responsed positively to red light compared with the control group,and the fruits color turning speeds were accelerated,the fruit hardness and titratable acid contents were significantly decreased(P<0.05),the soluble sugar was accumulated in advance,and the respiratory peak values were also significantly higher than that of the control group(P<0.05),the respiratory peak value of mangos was 4 days earlier than that of the control group.The hardness of melons presented a‘rise’change in the middle stage of storage,the red LED light irradiation significantly slowed down the accumulation of soluble sugar and the decomposition of titratable acid(P<0.05),the pericarp appeared‘faded white’phenomenon during the storage period.However,kiwifruits showed no response to red LED light.In conclusion,red LED light irradiation could significantly promote the coloring and ripening of postharvest fragrant pears and mangos,while presented no effects on the ripening and epidermal pigments accumulation of kiwifruits and melons.
作者
辛奇
刘帮迪
孙静
冯欣欣
郝光飞
童颖
XIN Qi;LIU Bang-di;SUN Jing;FENG Xin-xin;HAO Guang-fei;TONG Ying(College of Life Science and Food Engineering,Hebei University of Engineering,Handan 056038,China;Academy of Agricultural Planning&Engineering,Ministry of Agriculture and Rural Affairs,Beijing 100125,China;Key Laboratory of Agro-products Postharvest Handling,Ministry of Agriculture and Rural Affairs,Beijing 100121,China;Hangzhou Chuangzaomeiman Technology Co.,Ltd.,Hangzhou 311200,China)
出处
《保鲜与加工》
CAS
2022年第11期20-28,共9页
Storage and Process
基金
农业农村部规划设计研究院自主研发项目(QD202115)。
关键词
LED
红光
后熟
果实品质
硬度
可溶性糖
LED
red light
postharvest ripening
fruit qualities
firmness
soluble sugar
