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Effects of scion/rootstock combination on flavor quality of orange juice from Huanglongbing (HLB) -affected trees: a two-year study of the targeted metabolomics.

07:00 EST 13th February 2020 | BioPortfolio

Summary of "Effects of scion/rootstock combination on flavor quality of orange juice from Huanglongbing (HLB) -affected trees: a two-year study of the targeted metabolomics."

The bacterial disease Huanglongbing (HLB) has been causing large economic losses in the citrus industry worldwide. Aimed at unravelling the mechanisms of scion/rootstock combination on improving HLB-affected orange juice quality, a specific scion/rootstock combination field trial was designed using three sibling rootstocks and two late maturing sweet orange scion cultivars. Scion/rootstock combination significantly improved the overall consumer liking of orange juice from the trees, all of which were affected by HLB. Using a three-way ANOVA assay, rootstocks showed significant effects on the consumer liking and overall flavor, while scions had significant effects on the freshness and overall orange flavor intensity of the juice. A PLS-DA model combined with KEGG pathway enrichment analysis and some biomarker metabolites further indicated that scions mainly affected metabolism of alanine, aspartate and glutamate in orange fruit. Meanwhile, rootstocks had an impact on the biosynthetic pathways of secondary metabolites, especially the flavonoids biosynthesis with diosmin, narirutin and rutin involved. Sugars and organic acids were not closely correlated with the overall liking and sensory perception of orange juice. Rather, flavonoids such as diosmin and hesperidin, terpenoids such as limonin and nomilin, and volatile aromas played important roles in improving consumer overall liking. These results indicated that an optimum tolerant scion/rootstock combination can make a positive contribution towards improved fruit or juice quality from HLB-affected citrus trees and enabled a better understanding of fruit quality improvement based on scion and rootstock combinations.

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This article was published in the following journal.

Name: Journal of agricultural and food chemistry
ISSN: 1520-5118
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