Effects of melatonin on blueberry fruit quality and cell wall metabolism during low temperature storage

Qu, Guangfan; Ba, Liangjie; Wang, Rui; LI, Jiangkuo; Ma, Chao; Ji, Ning; Cao, Sen

doi:10.1590/fst.40822

Cited by 7 publications

(6 citation statements)

References 29 publications

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“…These results revealed that the exogenous MT treatment increased the pectin hydrolysis-related enzyme activities, causing the plum fruit to soften during the fruit ripening. However, previous studies revealed that MT treatment inhibits the activities of PME, PG, β-GAL, and Cx in fruits at the post-harvest storage stage [33]. This may be due to the different mechanisms of MT action at different treatment periods; thus, further studies must be conducted.…”

Section: Discussionmentioning

confidence: 95%

“…In May 2022, when the plum fruits were at the second rapid expansion period (90 days after flowering), 18 plum trees were selected for the present study. Among them, nine plum trees were treated with 100 µmol/L of MT [11,33], and the other nine were treated with tap water to serve as the control. Briefly, MT was dissolved in tap water and sprayed on the leaves until it started dripping (about 3 L per tree).…”

Section: Experimental Designmentioning

confidence: 99%

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Transcriptome Profiles Reveal the Promoting Effects of Exogenous Melatonin on Fruit Softening of Chinese Plum

Li,

Zhang,

et al. 2023

IJMS

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In this study, we investigated the effect of exogenous melatonin (MT) on cell wall metabolism leading to Chinese plum (Prunus salicina Lindl.) fruit softening. Exogenous MT treatment increased the endogenous MT content in plum fruits before fruit ripening. However, in mature plum fruits, exogenous MT treatment decreased the fruit hardness, pulp hardness, fruit elasticity, contents of ion-bound pectin, covalently-bound pectin, hemicellulose, and cellulose, and activities of xyloglucan endotransglycosylase/hydrolase and endo-β-1,4-glucanase, and increased the water-soluble pectin content, and activities of pectin methyl esterase, pectin lyase, polygalacturonase, β-galactopyranosidase, and α-L-arabinofuranosidase. Transcriptome analysis revealed that the differentially expressed genes (DEGs) associated with cell wall metabolism in the exogenous MT-treated plum fruits were mainly enriched in the pentose and glucuronate interconversions, phenylpropanoid biosynthesis, cyanoamino acid metabolism, and galactose metabolism pathways. Analysis of these DEGs revealed that exogenous MT treatment affected the expression of genes regulating the cell wall metabolism. Overall, exogenous MT treatment promotes the fruit softening of Chinese plum.

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Section: Discussionmentioning

confidence: 95%

Section: Experimental Designmentioning

confidence: 99%

Transcriptome Profiles Reveal the Promoting Effects of Exogenous Melatonin on Fruit Softening of Chinese Plum

Li,

Zhang,

et al. 2023

IJMS

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“…Furthermore, after melatonin treatment, the micromorphology of pectin showed that the CSP fraction exhibited dense networking and high aggregation (Figure 6). Several key enzymes (such as PG, PL, and b-Gal) involved in pectin metabolism showed low activity in melatonintreated plum fruits (Figure The coordinated responses of these degrading enzymes jointly modulate the depolymerization and solubilization of pectin, reducing the postharvest quality of fruits such as blueberry and Jujuba (Tang et al, 2020;Qu et al, 2022). Hence, we assumed that the inhibition of enzymatic degradation induced by exogenous melatonin delayed the changes in the structure and content of pectin, which was mainly responsible for maintaining fruit firmness during storage.…”

Section: Discussionmentioning

confidence: 99%

Effect of exogenous melatonin on antioxidant properties and fruit softening of ‘Fengtang’ plum fruit (Prunus salicina Lindl.) during storage at room temperature

Zhang,

Yang,

Yin

et al. 2024

Front. Plant Sci.

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‘Fengtang‘ plums soften quickly and lose flavor after harvest. This study comprehensively evaluated the effect of exogenous melatonin on the fruit quality of ‘Fengtang’ plums. According to our findings, exogenous melatonin prevented plum fruit from losing water, delayed the decline in firmness, and preserved a high TSS/TA level. Additionally, exogenous melatonin also enhanced the activity of antioxidant enzymes and increased the non-enzymatic antioxidants, thereby further increasing the antioxidant capacity of plum fruit. Notably, exogenous melatonin delayed the degradation of covalent soluble pectin (CSP), cellulose, and hemicellulose, as well as the rise in water-soluble pectin (WSP) concentration and the activity of cell wall degrading enzymes. Further investigation using atomic force microscopy (AFM) revealed that the chain-like structure of ionic-soluble pectin (ISP) and the self-assembly network structures of CSP were depolymerized, and melatonin treatment retarded the depolymerization of pectin structures. Our results showed that exogenous melatonin preserved the postharvest quality of plum fruits by controlling fruit softness and antioxidant capacity during storage.

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“…A decline in the plasma cell membrane integrity of the fruit cell during extended storage could contribute to the loss of cell turgor, followed by decompartmentalization and various permeability issues [31]. An increase in relative membrane permeability and the activity of membrane-degrading enzymes are typically linked with membrane lipid peroxidation [32]. However, it was observed that the membrane integrity of the longkong fruit was slightly improved by treatment with n-butanol.…”

Section: Membrane Permeability and Mda Contentmentioning

confidence: 99%

Effect of Aqueous n-Butanol Treatments on Shelf-Life Extension of Longkong Fruit during Ambient Storage

Charoenphun,

Ali,

Paulraj

et al. 2023

Horticulturae

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The pericarp of the Longkong fruit rapidly browns during ambient storage, typically reducing its shelf life to between 3 and 7 days. Recently, n-butanol has demonstrated a promising effect in preventing this deterioration, extending the shelf life of tropical fruits to more than a week. The present study exploited this opportunity to examine the exogenous application of aqueous n-butanol at various concentrations (0.2–0.6%) in controlling pericarp browning and suppressing different oxidoreductase enzymes in the pericarp under prolonged ambient storage conditions (8 days). Every two days, the fruit pericarps were tested for color (lightness (L*), redness (a*), and yellowness (b*)), browning index (BI), membrane permeability loss (MPL), malondialdehyde (MDA) content, total phenolic content (TPC), and reactive oxygen species (ROS). Enzymes including phenylalanine ammonia lyase (PAL), polyphenol oxidase (PPO), phospholipase D (PLD), lipoxygenase (LOX), superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPX) were also analyzed. All sample test results showed that increased storage significantly impacted color characteristics (decreased L*, b* and increased a*, and BI). MPL, MDA, and ROS also continuously increased. Furthermore, the browning-related enzymes (PAL and PPO), membrane-degrading enzymes (PLD and LOX), and antioxidant enzymes (SOD, CAT, and GPX) continuously increased in all pericarp samples throughout the storage. Among the samples, pericarp color, BI, MPL, MDA, PAL, PPO, PLD, and LOX were significantly high in the control samples, consequently adversely affecting the quality and shelf life of Longkong. On the other hand, the n-butanol-treated samples significantly controlled the loss and all problematic enzymes while improving the activities of SOD, CAT, and GPX in the pericarp. Furthermore, the positive effect of n-butanol application was dose-dependent; higher concentrations (0.4–0.6%) performed well in protecting the fruit from deterioration.

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Effects of melatonin on blueberry fruit quality and cell wall metabolism during low temperature storage

Cited by 7 publications

References 29 publications

Transcriptome Profiles Reveal the Promoting Effects of Exogenous Melatonin on Fruit Softening of Chinese Plum

Transcriptome Profiles Reveal the Promoting Effects of Exogenous Melatonin on Fruit Softening of Chinese Plum

Effect of exogenous melatonin on antioxidant properties and fruit softening of ‘Fengtang’ plum fruit (Prunus salicina Lindl.) during storage at room temperature

Effect of Aqueous n-Butanol Treatments on Shelf-Life Extension of Longkong Fruit during Ambient Storage

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