Antifungal activity of a chitosan and polyvinyl alcohol (PVA) mixture on damage-causing strains isolated from postharvest oranges grown in Vietnam

Them L. T., . and Dung N. A., . and Dien T. V. T., . and Ngoc L. S., . and Van P. T. H., . and Manh T. D., . Antifungal activity of a chitosan and polyvinyl alcohol (PVA) mixture on damage-causing strains isolated from postharvest oranges grown in Vietnam. pp. 737-744. ISSN 22317546

The identification and development of a biofilm that is highly efficacious against disease-causing microorganisms in postharvest fruits are pivotal in ensuring the stability and security of agricultural supply chains. The objectives of the present work were to assess the antifungal ability of a chitosan and polyvinyl alcohol (PVA) mixture on postharvest oranges using the agar-well diffusion method and to determine the minimum inhibitory concentration of the mixture. Four fungal species responsible for causing damage and rot in oranges were isolated from oranges namely Penicillium sp. Aspergillus niger Rhizopus delemar and Colletotrichum sp. Overall the chitosan and PVA combination showed antifungal activity against the four strains but the composition at which inhibition was maximised depended on the fungal species tested. The minimum inhibitory concentration of the chitosan/PVA mixture against the four isolated fungal strains was 1.15 chitosan 0.39 PVA 0.83 chitosan 0.56 PVA 1.1 chitosan 0.37 PVA and 0.41 chitosan 0.41 PVA for Penicillium sp. A. niger R. delemar and Colletotrichum sp. respectively. These results are expected to aid in further developments on the management of postharvest spoilage during storage of fruits and vegetables.

Full text available from: Official URL: http://www.ifrj.upm.edu.my/28%20(04)%202021/DONE%2...

Abstract

The identification and development of a biofilm that is highly efficacious against disease-causing microorganisms in postharvest fruits are pivotal in ensuring the stability and security of agricultural supply chains. The objectives of the present work were to assess the antifungal ability of a chitosan and polyvinyl alcohol (PVA) mixture on postharvest oranges using the agar-well diffusion method and to determine the minimum inhibitory concentration of the mixture. Four fungal species responsible for causing damage and rot in oranges were isolated from oranges namely Penicillium sp. Aspergillus niger Rhizopus delemar and Colletotrichum sp. Overall the chitosan and PVA combination showed antifungal activity against the four strains but the composition at which inhibition was maximised depended on the fungal species tested. The minimum inhibitory concentration of the chitosan/PVA mixture against the four isolated fungal strains was 1.15 chitosan 0.39 PVA 0.83 chitosan 0.56 PVA 1.1 chitosan 0.37 PVA and 0.41 chitosan 0.41 PVA for Penicillium sp. A. niger R. delemar and Colletotrichum sp. respectively. These results are expected to aid in further developments on the management of postharvest spoilage during storage of fruits and vegetables.

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Item Type:	Article
AGROVOC Term:	Sweet oranges
AGROVOC Term:	Chitosan
AGROVOC Term:	Microorganisms
AGROVOC Term:	Sampling
AGROVOC Term:	Experiments
AGROVOC Term:	Statistical analysis
AGROVOC Term:	Postharvest diseases
AGROVOC Term:	Antifungal properties
AGROVOC Term:	Disease prevention
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:55
URI:	http://webagris.upm.edu.my/id/eprint/9497

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