Role of exogenous melatonin involved in phenolic metabolism of Zizyphus jujuba fruit

Lei Wang; Zisheng Luo; Zhaojun Ban; Nan Jiang; Mingyi Yang; Li Li

doi:10.1016/j.foodchem.2020.128268

Role of exogenous melatonin involved in phenolic metabolism of Zizyphus jujuba fruit

Food Chem. 2021 Mar 30;341(Pt 2):128268. doi: 10.1016/j.foodchem.2020.128268. Epub 2020 Oct 2.

Authors

Lei Wang¹, Zisheng Luo², Zhaojun Ban³, Nan Jiang⁴, Mingyi Yang⁵, Li Li⁶

Affiliations

¹ Key Laboratory of Agro-Products Postharvest Handling, Ministry of Agriculture and Rural Affairs, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China. Electronic address: [email protected].
² Key Laboratory of Agro-Products Postharvest Handling, Ministry of Agriculture and Rural Affairs, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; Ningbo Research Institute, Zhejiang University, Ningbo 315100, China; National-Local Joint Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang Engineering Laboratory of Food Technology and Equipment, Zhejiang University, Hangzhou 310058, China. Electronic address: [email protected].
³ School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China. Electronic address: [email protected].
⁴ Key Laboratory of Agro-Products Postharvest Handling, Ministry of Agriculture and Rural Affairs, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China. Electronic address: [email protected].
⁵ Key Laboratory of Agro-Products Postharvest Handling, Ministry of Agriculture and Rural Affairs, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China. Electronic address: [email protected].
⁶ Key Laboratory of Agro-Products Postharvest Handling, Ministry of Agriculture and Rural Affairs, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; Ningbo Research Institute, Zhejiang University, Ningbo 315100, China; National-Local Joint Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang Engineering Laboratory of Food Technology and Equipment, Zhejiang University, Hangzhou 310058, China. Electronic address: [email protected].

PMID: 33039742
DOI: 10.1016/j.foodchem.2020.128268

Abstract

To investigate the effects of exogenous melatonin (MLT) treatment on the quality of postharvest jujubes, fresh 'Lingwuchangzao', and 'Dongzao' jujubes (Zizyphus jujuba Mill) were dipped in MLT solution at the dose of 0, 50,100 and 200 μmol L^-1 for 20 min. Results showed the exogenous MLT application significantly delayed the color change and firmness decline, and maintained the content of total soluble solids and titratable acidity of both jujube cultivars, (p < 0.05). It was demonstrated that the endogenous MLT content was increased by exogenous MLT treatment. Furthermore, phenolic compounds level was enhanced by MLT application, companied by the upregulated expression of main genes involved in phenolic biosynthesis, including phenylalanine ammonia-lyase, cinnamate 4-hydroxylase, chalcone synthase, flavonoid 3β-hydroxylase, leucoanthocyanidin reductase, and anthocyanidin synthase. Given the evidence from the present study, it's proposed that the exogenous MLT approach is a promising approach for maintaining quality attributes and delaying the senescence of postharvest jujubes.

Keywords: Jujube; Melatonin; Phenolic; Quality; Senescence.

MeSH terms

Flavonoids / pharmacology
Melatonin / pharmacology*
Oxidation-Reduction
Phenols / metabolism*
Ziziphus / metabolism*

Substances

Flavonoids
Phenols
Melatonin