摘要
将采摘后的‘爱媛38号’柑橘果实经1.0 g/L褪黑素浸泡处理,在低温(6~8℃)贮藏过程中测定果实品质和乙醇代谢相关指标的变化。结果表明,与对照相比,采后褪黑素处理能使果实的新鲜度和Vc含量分别提高21.40%和8.85%(P<0.05),同时提升了果实的风味与可溶性固形物含量,抑制了果实的呼吸强度。贮藏60 d时,经褪黑素处理后的果实丙酮酸含量上升了17.42%,乙醇、乙醛含量分别减少了52.21%、36.85%(P<0.05),丙酮酸脱羧酶(pyruvate decarboxylase,PDC)和乙醇脱氢酶(alcohol dehydrogenase,ADH)的基因表达量与酶活性均呈下降趋势。综上,以质量浓度为1.0 g/L的褪黑素处理可以有效减少柑橘果实中乙醇的积累,提高果实贮藏品质。
To explore the effects of exogenous melatonin treatment on postharvest flavor and fruit quality in citrus fruit,‘Aiyuan 38’citrus after harvest were immersed with 1.0 g/L melatonin to determine the changes of fruit quality and relevant indicators of ethanol metabolism during storage at low temperature(6~8℃).The results showed that compared with the control group,the freshness and the Vitamin C(Vc)content of citrus were significantly increased by 21.40%and 8.85%(P<0.05),and melatonin maintained the soluble contents(TSS),and inhibited the respiratory intensity.On the 60th day of storage,the pyruvate content of citrus treated with melatonin increased by 17.42%,while the ethanol and acetaldehyde content decreased by 52.21%and 36.85%(P<0.05),respectively.In the meantime,the gene expression and enzymatic activities of pyruvate decarboxylase(PDC)and alcohol dehydrogenase(ADH)showed a downtrend.Treatment with melatonin at the concentration of 1.0 g/L can effectively reduce the accumulation of ethanol in citrus fruits and improve the fruit quality,which provides a theoretical reference for postharvest regulation of fruit flavor quality.
作者
王晶
洪敏
冯雨
贺明阳
王日葵
喻最新
周炼
WANG Jing;HONG Min;FENG Yu;HE Mingyang;WANG Rikui;YU Zuixin;ZHOU Lian(Citrus Research Institute,Chinese Academy of Agricultural Sciences,Chongqing 400712,China;Citrus Research Institute,Southwest University,Chongqing 400712,China;Key Laboratory of Plant Resources Conservation and Sustainable Utilization,South China Botanical Garden,Chinese Academy of Sciences,Guangzhou 510650,China)
出处
《食品与发酵工业》
CAS
CSCD
北大核心
2019年第21期147-154,共8页
Food and Fermentation Industries
基金
重庆市基础研究与前沿探索项目(cstc2018jc yj AX0256)
重庆市科技专项(cstc2016shms-ztzx80005)
中央高校基本科研业务费(XDJK2017C016)
中国博士后科学基金(2018M633178)
作者简介
第一作者:王晶,硕士研究生;通讯作者:王日葵,副研究员,E-mail:wangrikui@cric.cn。
