scholarly journals Antifungal effect of volatile organic compounds produced by Bacillus amyloliquefaciens CPA-8 against fruit pathogen decays of cherry

2017 ◽  
Vol 64 ◽  
pp. 219-225 ◽  
Author(s):  
A. Gotor-Vila ◽  
N. Teixidó ◽  
A. Di Francesco ◽  
J. Usall ◽  
L. Ugolini ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Bacillus Amyloliquefaciens ◽  
Antifungal Effect ◽  
Volatile Organic

scholarly journals Antifungal Properties of Two Volatile Organic Compounds on Barley Pathogens and Introduction to Their Mechanism of Action

2019 ◽  
Vol 16 (16) ◽  
pp. 2866 ◽  
Author(s):  
Amine Kaddes ◽  
Marie-Laure Fauconnier ◽  
Khaled Sassi ◽  
Bouzid Nasraoui ◽  
M. Haïssam Jijakli
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Fusarium Culmorum ◽  
Strongly Correlated ◽  
Experimental Conditions ◽  
Indirect Contact ◽  
Antifungal Effect ◽  
Volatile Organic ◽  
Antifungal Effects ◽  
Intracellular Medium

This study evaluated the antifungal effects of various volatile organic compounds (VOCs) against two common pathogens: Fusarium culmorum and Cochliobolus sativus. Among the various VOCs, methyl propanoate (MP) and methyl prop-2-enoate (MA) exhibited remarkable antifungal effects under different experimental conditions (direct or indirect contact) and at different concentrations (500–1000 μM). In addition, the type of antifungal effect (fungistatic or fungicidal) appeared to be strongly correlated with the VOC concentrations. Additional tests revealed that both molecules increased membrane permeability of pathogenic spores, which resulted in a decreased efflux of K+ ions into the intracellular medium.

scholarly journals Volatile Organic Compound Profiles Associated with Microbial Development in Feedlot Pellets Inoculated with Bacillus amyloliquefaciens H57 Probiotic

Animals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3227
Author(s):  
Thi Thuy Ngo ◽  
Peter Dart ◽  
Matthew Callaghan ◽  
Athol Klieve ◽  
David McNeill
Keyword(s):  
Volatile Organic Compounds ◽  
Ambient Temperature ◽  
Organic Compounds ◽  
Bacillus Amyloliquefaciens ◽  
Principal Component ◽  
Gas Chromatography Mass Spectrometry ◽  
Score Plot ◽  
Volatile Organic ◽  
Microbial Volatile Organic Compounds ◽  
Odour Profile

Mould and bacterial contamination releases microbial volatile organic compounds (mVOCs), causing changes in the odour profile of a feed. Bacillus amyloliquefaciens strain H57 (H57) has the potential ability to inhibit microbial growth in animal feeds. This study tested the hypothesis that H57 influences the odour profile of stored feedlot pellets by impeding the production of mVOCs. The emission of volatile organic compounds (VOCs) of un-inoculated pellets and those inoculated with H57, stored either at ambient temperature (mean 22 °C) or at 5 °C, was monitored at 0, 1, 2, and 3 months by gas chromatography–mass spectrometry. Forty VOCs were identified in all the pellet samples analysed, 24 of which were potentially of microbial and 16 of non-microbial origin. A score plot of the principal component analysis (PCA) showed that the VOC profiles of the pellets stored at ambient temperature changed more rapidly over the 3 months than those stored at 5 °C, and that change was greater in the un-inoculated pellets when compared to the inoculated ones. The bi-plot and correlation loading plots of the PCA indicated that the separation of the un-inoculated pellets from the other treatments over the 3 months was primarily due to nine mVOCs. These mVOCs have been previously identified in grains spoiled by fungi, and could be considered potential markers of the types of fungi that H57 can protect pellets against. These data indicate the ability of H57 to maintain the odour profile and freshness of concentrated feed pellets. This protective influence can be detected as early as 3 months into ambient temperature storage.

scholarly journals Feed Preference Response of Weaner Bull Calves to Bacillus amyloliquefaciens H57 Probiotic and Associated Volatile Organic Compounds in High Concentrate Feed Pellets

Animals ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 51
Author(s):  
Thi Thuy Ngo ◽  
Nguyen N. Bang ◽  
Peter Dart ◽  
Matthew Callaghan ◽  
Athol Klieve ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Bacillus Amyloliquefaciens ◽  
Equal Access ◽  
Relative Preference ◽  
Bull Calves ◽  
Volatile Organic ◽  
Feed Pellets ◽  
Microbial Volatile Organic Compounds ◽  
Odour Profile

This study tested the hypothesis that Bacillus amyloliquefaciens strain H57 (H57) improves preference by reducing the development of microbial volatile organic compounds (mVOCs) in feed pellets. Sixteen bull calves were, for 4 weeks, provided equal access to a panel of 8 automated feed bunks in a single paddock with some hay. Each bunk contained pellets with (H57) or without (Control) the H57, each aged for 4 months at either ambient or chiller temperature. Each treatment was changed to a new bunk pair position weekly. Relative preference was determined according to weight of pellets remaining per hour per treatment bunk pair per 24 h. Pellets were analysed for volatile organic compounds (VOCs) and the concentrations tested for correlation with relative preference. Calves showed the lowest preference (p < 0.0001) for the Control/Ambient treatment whereas preference for all other treatments (H57/Ambient; H57/Chiller; Control/Chiller) was similar. The Control/Ambient treatment odour profile grouped differently to the other 3 treatments which grouped similarly to each other. Up to 16 mVOCs were determined to have potential as pre-ingestive signals for the extent of microbial spoilage. Further studies are required to find which combination of these mVOCs, when added to pellets, results in feed aversion.

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