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Mechanism of Peppermint Extract-Induced Delay of 'Packham's Triumph' Pear ( L.) Postharvest Ripening

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Journal Foods
Specialty Biotechnology
Date 2024 Mar 13
PMID 38472770
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Abstract

Postharvest ripening is correlated to the quality and shelf life of European pear fruit. In this study, the effects of peppermint extract on fruit phenotype, related physiological activities, and aroma components during postharvest ripening of the European pear variety 'Packham's Triumph' were examined. Fruit treated with 2.0 g L peppermint extract for 12 h showed delayed softening by 4 d compared with that of the untreated control group. The peak values of ethylene and respiratory rate in fruit were reduced to a certain extent after peppermint extract treatment; however, the peppermint extract did not delay the occurrence of the respiratory climacteric peak. Peppermint extract treatment also did not significantly increase the content of the characteristic peppermint aroma in pear fruit. Further, widely targeted metabolome analysis revealed 298 significantly different metabolites, with flavonoids (40%) and lipid compounds (15%) accounting for the highest proportion on the first day after treatment. The Kyoto Encyclopedia of Genes and Genomes pathway result showed significant enrichment in the metabolic pathways of biosynthesis of flavonoid, isoflavonoid, flavone and flavonol, linoleic acid, and alpha-linolenic acid metabolism following peppermint extract treatment. The combined analysis of transcriptome and metabolome data showed significant enrichment in linoleic acid metabolism and alpha-linolenic acid metabolism on the first, third, and fifth days after peppermint extract treatment. This study indicates that peppermint extract mainly affects the pear fruit softening process in the early stage after treatment.

Citing Articles

Insights into the aroma volatiles and the changes of expression of ester biosynthesis candidate genes during postharvest storage of European pear.

Zhu X, Xu X, Jiang F, Li Q, Zhang A, Li J Front Plant Sci. 2024; 15:1498658.

PMID: 39678004 PMC: 11638670. DOI: 10.3389/fpls.2024.1498658.

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