Pinocembrin-7-Glucoside (P7G) Reduced Postharvest Blue Mold of Navel Orange by Suppressing Growth

Overview

Journal Microorganisms

Specialty Microbiology

Date 2020 Apr 12

PMID 32276525

Citations 7

Authors

Chuying Chen

Jinyin Chen

Chunpeng Wan

Affiliations

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Abstract

The current study aimed to examine the in vitro and in vivo antifungal potential of pinocembrin-7-glucoside (P7G). P7G is an antifungal flavanone glycoside isolated from Vahl. fruit against , a causative pathogen of blue mold disease in citrus fruit, and this study elucidates its possible action mechanism. P7G had a prominent mycelial growth inhibitory activity against , with an observed half maximal effective concentration, minimum inhibitory concentration and minimum fungicidal concentration of 0.08, 0.2, and 0.8 g/L, respectively. The data from the in vivo test show that P7G significantly reduced blue mold symptoms and disease development of in artificially inoculated "Newhall" navel orange. Compared to the control, increases in the cell membrane permeability of supernatant and decreases in the intracellular constituent (e.g., soluble protein, reducing sugar, and total lipid) contents of mycelia were identified, supporting scanning electron microscopy and transmission electron microscopy observations. Furthermore, a marked decline in both chitin and glucanase contents of mycelia treated with P7G was induced by increasing its related degrading enzyme activities, suggesting that the cell wall structure was destroyed. The current study indicated that P7G may be a novel alternative for reducing blue mold by suppressing mycelial growth of via a cell membrane/wall-targeting mechanism.

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