Impact of Storage Condition on Chemical Composition and Antifungal Activity of Pomelo Extract against Colletotrichum gloeosporioides and Anthracnose in Post-harvest Mango
Resource
109-2313-B-002-053-MY2
111AS-1.3.2-ST-aS
Journal
Plants-Basel
Journal Volume
11
Journal Issue
15
Pages
2064
Date Issued
2022-08
Author(s)
Abstract
Anthracnose caused by Colletotrichum leads to a tremendous post-harvest mango loss. While chemical fungicides are applied to control anthracnose, natural alternatives are preferred due to food safety and environmental concerns. Pomelo extract (PE) exhibits a broad spectrum of antimicrobial activities; however, its effect against anthracnose is unknown. Here we investigated the chemical profile of PE using GC-MS and the anti-anthracnose activity of PE using in vitro and in vivo assays. We also evaluated the impact of storage temperature (0 degrees, 5 degrees, 10 degrees, 20 degrees, -20 degrees, and -80 degrees C) and light conditions on the composition and antifungal activity of PE. We found that PE inhibited C. gloeosporioides in vitro with an IC50 of 3.2 mL L-1. Applying chitosan-based coating incorporated with 20 mL L-1 PE significantly suppressed anthracnose in post-harvest 'Keitt' mango. A storage temperature below 5 degrees C substantially preserved major compounds and the antifungal activity of PE after 6 m of storage. Finally, we showed that applying d-limonene, the key constituent of PE, inhibited C. gloeosporioides in vitro (IC50: 10.9 mM) and suppressed anthracnose in vivo. In conclusion, we demonstrated that the application of PE and d-limonene are sustainable methods for anthracnose control in post-harvest crops and established the preservation protocol for PE.
Subjects
anthracnose
antifungal
edible coating
mango
pomelo peel
post-harvest diseases
Publisher
MDPI
Type
journal article