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Release of Acetaldehyde from β-Cyclodextrins Inhibits Postharvest Decay Fungi in Vitro
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Department of Plant Pathology.
Abstract
Many naturally occurring plant volatiles are known to have antifungal properties. However, they have limited use because they diffuse rapidly in air. In this in vitro study, acetaldehyde was chosen as a prototype volatile in order to study the controlled release of antifungal volatiles from cyclodextrins (CD). The major postharvest pathogens Alternaria alternata, Botrytis cinerea, and Colletotrichum acutatum were exposed to the pure volatile for 7 days at 23 °C. Acetaldehyde was most effective against A. alternata, followed by C. acutatum, and B. cinerea, with 0.12, 0.56, and 1.72 μL/L in air being required to inhibit fungal growth, respectively, according to the bioassay developed. Second, the effectiveness of the new β-CD−acetaldehyde release system was evaluated against A. alternata for 7 days at 23 °C. Sufficient volatile was released from 0.7 g of β-CD−acetaldehyde to prevent fungal growth in vitro.
Keywords: Colletotrichum acutatum; Alternaria alternata; Botrytis cinerea; inclusion complexes; cyclodextrins; acetaldehyde; postharvest shelf life
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History
- Published In Issue August 22, 2007
- Received for review May 31, 2007. Accepted June 8, 2007. This project was partially funded by Project GREEEN of Michigan State University.
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