Release of acetaldehyde from beta-cyclodextrins inhibits postharvest decay fungi in vitro.
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 degrees C. Acetaldehyde was most effective against A. alternata, followed by C. acutatum, and B. cinerea, with 0.12, 0.56, and 1.72 microL/L in air being required to inhibit fungal growth, respectively, according to the bioassay developed. Second, the effectiveness of the new beta-CD-acetaldehyde release system was evaluated against A. alternata for 7 days at 23 degrees C. Sufficient volatile was released from 0.7 g of beta-CD-acetaldehyde to prevent fungal growth in vitro.
School of Packaging, Michigan State University, East Lansing, Michigan 48824-1223, USA.
Eva
E
Almenar
Rafael
R
Auras
Phillip
P
Wharton
Maria
M
Rubino
Bruce
B
Harte
D000079:Acetaldehyde / Q000032:analysis* / Q000494:pharmacology*; D000528:Alternaria / Q000187:drug effects; D020171:Botrytis / Q000187:drug effects; D020231:Colletotrichum / Q000187:drug effects; D005658:Fungi / Q000187:drug effects* / Q000254:growth & development; D005659:Fungicides, Industrial / Q000494:pharmacology*; D014835:Volatilization; D047392:beta-Cyclodextrins / Q000737:chemistry*
D005659:Fungicides, Industrial; D047392:beta-Cyclodextrins; D000079:Acetaldehyde