Production and effects of volatile organic compounds during interspecific interactions

Competition between mycelia of saprotrophic cord-forming basidiomycetes occurs both within dead woody resources and in the soil-litter interface, and involves a variety of antagonistic mechanisms including the production of volatile organic compounds (VOCs). The antagonistic potential of VOC profile...

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Bibliographic Details
Published in:Fungal ecology 2016-04, Vol.20, p.144-154
Main Authors: El Ariebi, Nawal, Hiscox, Jennifer, Scriven, Sarah A., Müller, Carsten T., Boddy, Lynne
Format: Article
Language:English
Subjects:
Basidiomycetes
Basidiomycota
Cord-formers
Fractal dimension
fractal dimensions
Fungi
gas chromatography-mass spectrometry
GC–MS
GC–MS
headspace analysis
hyphae
Image analysis
mycelium
saprotrophs
Secondary metabolites
soil ecology
solid phase microextraction
SPME
trays
VOCs
volatile organic compounds
wood
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Summary:Competition between mycelia of saprotrophic cord-forming basidiomycetes occurs both within dead woody resources and in the soil-litter interface, and involves a variety of antagonistic mechanisms including the production of volatile organic compounds (VOCs). The antagonistic potential of VOC profiles from interactions in wood blocks and in soil microcosms was assessed using shared headspace experiments, and the profile of VOCs emitted over the course of interactions elucidated using solid phase microextraction (SPME) with gas chromatography-mass spectrometry (GC–MS). Quantitative and qualitative changes in VOC production occurred in interactions compared to self-pairing controls, with different VOC profiles from fungi growing in wood blocks compared to soil trays. There were both stimulatory and inhibitory effects of VOCs on target mycelial extension rate, hyphal coverage and fractal dimension. VOC-mediated effects were greater in self-pairing controls compared to interactions, and differed depending on the substratum in which the VOC-producing fungi were growing. •Production of VOCs from interacting fungi was measured in wood and across soil.•Quantity and identity of VOCs differed with substrate and interaction status.•Shared headspace experiments assessed antagonistic effects of VOCs.•VOCs effected stimulatory or inhibitory effects depending on the species involved.•VOC-mediated effects differed with substrate and interaction status.
ISSN:1754-5048
DOI:10.1016/j.funeco.2015.12.013