Muscodor albus Volatiles Control Toxigenic Fungi under Controlled Atmosphere (CA) Storage Conditions

被引:17
作者
Braun, Gordon [1 ]
Vailati, Matteo
Prange, Robert [2 ]
Bevis, Eric [1 ]
机构
[1] Agr & Agri Food Canada, Atlantic Food & Hort Res Ctr, Kentville, NS B4N 1J5, Canada
[2] Dalhousie Univ, Fac Agr, Truro, NS B2N 5E3, Canada
关键词
Muscodor albus; post-harvest pathogen control; controlled atmosphere storage; toxigenic fungi; mycotoxin; fumigation; natural volatiles; POSTHARVEST GRAY MOLD; DECAY; ANTIMICROBIALS; TEMPERATURE;
D O I
10.3390/ijms131215848
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Muscodor albus, a biofumigant fungus, has the potential to control post-harvest pathogens in storage. It has been shown to produce over 20 volatile compounds with fungicidal, bactericidal and insecticidal properties. However, M. albus is a warm climate endophyte, and its biofumigant activity is significantly inhibited at temperatures below 5 degrees C. Conidia of seven mycotoxin producing fungi, Aspergillus carbonarius, A. flavus, A. niger, A. ochraceus, Penicillium verrucosum, Fusarium culmorum and F. graminearum, were killed or prevented from germinating by exposure to volatiles from 2 g M. albus-colonized rye grain per L of headspace in sealed glass jars for 24 h at 20 degrees C. Two major volatiles of M. albus, isobutyric acid (IBA) and 2-methyl-1-butanol (2MB) at 50 mu L/L and 100 mu L/L, respectively, gave differential control of the seven fungi when applied individually at 20 degrees C. When the fungi were exposed to both IBA and 2MB together, an average of 94% of the conidia were killed or suppressed. In a factorial experiment with controlled atmosphere storage (CA) at 3 degrees C and 72 h exposure to four concentrations of IBA and 2MB combinations, 50 mu L/L IBA plus 100 mu L/L 2MB killed or suppressed germination of the conidia of all seven fungi. Controlled atmosphere had no significant effect on conidial viability or volatile efficacy. Major volatiles of M. albus may have significant potential to control plant pathogens in either ambient air or CA storage at temperatures below 5 degrees C. However, combinations of volatiles may be required to provide a broader spectrum of control than individual volatiles.
引用
收藏
页码:15848 / 15858
页数:11
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