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

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

doi:10.1016/j.foodchem.2020.128268

Cited by 49 publications

(29 citation statements)

References 38 publications

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“…This treatment also maintained the nutritional quality and reduced the decay of postharvest strawberry fruit by enhancing the contents of total phenolics, the accumulation of anthocyanins and γ-aminobutyric acid transaminase (GABA) shunt activity [29]. The exogenous application of melatonin increased the amount of phenolic compounds by upregulating the expression of related genes, which led to a delay in fruit senescence and deterioration in the quality of jujube fruit [47]. In this study, melatonin also effectively enhanced enzymatic antioxidants, such as the activities of SOD, GR, CAT and APX, and the content of non-enzymatic antioxidants, such as the total flavonoids, TP and ASA, and improving the T-AOC of the fruit, resulting in a reduction in the content of H 2 O 2 , O 2− and MDA.…”

Section: Discussionmentioning

confidence: 99%

Melatonin Treatment Improves Postharvest Preservation and Resistance of Guava Fruit (Psidium guajava L.)

Fan

Xiong

Lei

et al. 2022

Foods

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Guava fruit has a short postharvest shelf life at room temperature. Melatonin is widely used for preservation of various postharvest fruit and vegetables. In this study, an optimal melatonin treatment (600 μmol·L−1, 2 h) was identified, which effectively delayed fruit softening and reduced the incidence of anthracnose on guava fruit. Melatonin effectively enhanced the antioxidant capacity and reduced the oxidative damage to the fruit by reducing the contents of superoxide anions, hydrogen peroxide and malondialdehyde; improving the overall antioxidant capacity and enhancing the enzymatic antioxidants and non-enzymatic antioxidants. Melatonin significantly enhanced the activities of catalase, superoxide dismutase, ascorbate peroxidase and glutathione reductase. The contents of total flavonoids and ascorbic acid were maintained by melatonin. This treatment also enhanced the defense-related enzymatic activities of chitinase and phenylpropanoid pathway enzymes, including phenylalanine ammonia lyase and 4-coumaric acid-CoA-ligase. The activities of lipase, lipoxygenase and phospholipase D related to lipid metabolism were repressed by melatonin. These results showed that exogenous melatonin can maintain the quality of guava fruit and enhance its resistance to disease by improving the antioxidant and defense systems of the fruit.

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Section: Discussionmentioning

confidence: 99%

Melatonin Treatment Improves Postharvest Preservation and Resistance of Guava Fruit (Psidium guajava L.)

Fan

Xiong

Lei

et al. 2022

Foods

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“…For example, melatonin treatment maintains higher glucosinolates in broccoli, and increases the percentage of glucoraphanin, the most potent anticarcinogenic agent (Miao et al 2020). Moreover, the content of phenolic compounds in Jujube is increased by melatonin treatment (Wang et al 2020). Previous results have shown that exogenous hormones can control the new shoot bud and accumulation of medicinal ingredients in plants, especially traditional Chinese medicinal plants (He et al 2014;Halim et al 2017;Salerno et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Foliar Spraying of 6-Benzylaminopurine Promotes Growth and Flavonoid Accumulation in Mulberry (Morus alba L.)

Zhang

Zhang²,

Zhang

et al. 2021

J Plant Growth Regul

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Mulberry (Morus alba L.) leaf, a “source of both medicine and food”, contains antioxidant ingredients such as flavonoids, alkaloids and polyphenols. The effects of 6-benzylaminopurine (6-BA) treatment on plant growth and flavonoid contents in mulberry leaves were investigated in this study. The expression of rutin (Rut), chlorogenic acid (ChA), isoquercitrin (IQ) and astragaloside IV (Ast) related genes in the flavonoid synthesis pathways was investigated in mulberry leaves. The results showed that 6-BA treatment significantly promoted mulberry differentiation and growth as well as, increased the numbers of new shoots and buds compared to the control. In addition, 30 mg/L 6-BA significantly increased the contents of Rut, IQ and Ast, and it strongly induced the expression of flavonoid biosynthesis-related genes, including flavonoid 3-O-glucosyltransferase (F3GT), 4-xoumarate-CoA ligase (4CL), phenylalanine (PAL) and chalcone synthase (CHS). The dietary risk assessment of mulberry leaves was based on hormone residues 5 days after treatment with 30 mg /L 6-BA, and the results showed that the dietary exposure risk of 6-BA was extremely low without causing any health concern. Thus, treatment with 30 mg/L 6-BA is a new method to improve the medicinal quality and development of high-value mulberry leaf foods without any potential risk.

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“…As a universal growth‐regulating and stress‐protecting molecule, melatonin shows strong effects on carbohydrate metabolism in different plant species 38–41 . When encountering adversity, melatonin enhances the antioxidant defense system and photosynthetic efficiency by regulating key metabolic pathways, such as phenylpropanoid, chlorophyll and carotenoid biosynthesis, carbon fixation, as well as sugar metabolism in plants 29,42,43 .…”

Section: Discussionmentioning

confidence: 99%

Melatonin delays dark‐induced leaf senescence by inducing miR171b expression in tomato

Wang

Cai

Xing

et al. 2022

Journal of Pineal Research

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Melatonin functions in multiple aspects of plant growth, development, and stress response. Nonetheless, the mechanism of melatonin in plant carbon metabolism remains largely unknown. In this study, we investigated the influence of melatonin on the degradation of starch in tomato leaves. Results showed that exogenous melatonin attenuated carbon starvation‐induced chlorophyll degradation and leaf senescence. In addition, melatonin delayed leaf starch degradation and inhibited the transcription of starch‐degrading enzymes after sunset. Interestingly, melatonin‐alleviated symptoms of leaf senescence and starch degradation were compromised when the first key gene for starch degradation, α‐glucan water dikinase (GWD), was overexpressed. Furthermore, exogenous melatonin significantly upregulated the transcript levels of several microRNAs, including miR171b. Crucially, the GWD gene was identified as a target of miR171b, and the overexpression of miR171b ameliorated the carbon starvation‐induced degradation of chlorophyll and starch, and inhibited the expression of the GWD gene. Taken together, these results demonstrate that melatonin promotes plant tolerance against carbon starvation by upregulating the expression of miR171b, which can directly inhibit GWD expression in tomato leaves.

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

Cited by 49 publications

References 38 publications

Melatonin Treatment Improves Postharvest Preservation and Resistance of Guava Fruit (Psidium guajava L.)

Melatonin Treatment Improves Postharvest Preservation and Resistance of Guava Fruit (Psidium guajava L.)

Foliar Spraying of 6-Benzylaminopurine Promotes Growth and Flavonoid Accumulation in Mulberry (Morus alba L.)

Melatonin delays dark‐induced leaf senescence by inducing miR171b expression in tomato

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