Chemical Communication between the Endophytic Fungus Paraconiothyrium Variabile and the Phytopathogen Fusarium oxysporum

Combès, Audrey; Ndoye, Idrissa; Bance, Caroline; Bruzaud, Jérôme; Djédiat, Chakib; Dupont, Joëlle; Nay, Bastien; Prado, Soizic

doi:10.1371/journal.pone.0047313

Cited by 80 publications

(74 citation statements)

References 44 publications

(42 reference statements)

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“…Considering such aspects, LDI-MSI approaches might represent new opportunities to decipher molecular strategies underlying dynamism and equilibrium in a saxicolous lichen mosaic. Little is known about aspects conferring advantage and factors promoting stability in multi-species communities but chemistry and allelopathy are presumed to be of paramount importance54 as recently proven for endophytes55. Therefore, delineating chemical interactions ongoing at marginal contacts between lichen thalli might advance the understanding of such complex relationships.…”

Section: Discussionmentioning

confidence: 99%

Spatial mapping of lichen specialized metabolites using LDI-MSI: chemical ecology issues for Ophioparma ventosa

Pogam

Legouin

Geairon

et al. 2016

Sci Rep

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Imaging mass spectrometry techniques have become a powerful strategy to assess the spatial distribution of metabolites in biological systems. Based on auto-ionisability of lichen metabolites using LDI-MS, we herein image the distribution of major secondary metabolites (specialized metabolites) from the lichen Ophioparma ventosa by LDI-MSI (Mass Spectrometry Imaging). Such technologies offer tremendous opportunities to discuss the role of natural products through spatial mapping, their distribution patterns being consistent with previous chemical ecology reports. A special attention was dedicated to miriquidic acid, an unexpected molecule we first reported in Ophioparma ventosa. The analytical strategy presented herein offers new perspectives to access the sharp distribution of lichen metabolites from regular razor blade-sectioned slices.

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Section: Discussionmentioning

confidence: 99%

Spatial mapping of lichen specialized metabolites using LDI-MSI: chemical ecology issues for Ophioparma ventosa

Pogam

Legouin

Geairon

et al. 2016

Sci Rep

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“…Interactions among endophytes are rarely examined (Combès et al. , Rodriguez Estrada et al. ), and no specific information exists regarding in situ interactions in woody tissue.…”

Section: Introductionmentioning

confidence: 99%

Good neighbors aplenty: fungal endophytes rarely exhibit competitive exclusion patterns across a span of woody habitats

Lee

Powell

Oberle

et al. 2019

Ecology

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Environmental forces and biotic interactions, both positive and negative, structure ecological communities, but their relative roles remain obscure despite strong theory. For instance, ecologically similar species, based on the principle of limiting similarity, are expected to be most competitive and show negative interactions. Specious communities that assemble along broad environmental gradients afford the most power to test theory, but the communities often are difficult to quantify. Microbes, specifically fungal endophytes of wood, are especially suited for testing community assembly theory because they are relatively easy to sample across a comprehensive range of environmental space with clear axes of variation. Moreover, endophytes mediate key forest carbon cycle processes, and although saprophytic fungi from dead wood typically compete, endophytic fungi in living wood may enhance success through cooperative symbioses. To classify interactions within endophyte communities, we analyzed fungal DNA barcode variation across 22 woody plant species growing in woodlands near Richmond, New South Wales, Australia. We estimated the response of endophytes to the measured wood environment (i.e., 11 anatomical and chemical wood traits) and each other using latent‐variable models and identified recurrent communities across wood environments using model‐based classification. We used this information to evaluate whether (1) co‐occurrence patterns are consistent with strong competitive exclusion, and (2) a priori classifications by trophic mode and phylum distinguish taxa that are more likely to have positive vs. negative associations under the principle of limiting similarity. Fungal endophytes were diverse (mean = 140 taxa/sample), with differences in community composition structured by wood traits. Variation in wood water content and carbon concentration were associated with especially large community shifts. Surprisingly, after accounting for wood traits, fungal species were still more than three times more likely to have positive than negative co‐occurrence patterns. That is, patterns consistent with strong competitive exclusion were rare, and positive interactions among fungal endophytes were more common than expected. Confirming the frequency of positive vs. negative interactions among fungal taxa requires experimental tests, and our findings establish clear paths for further study. Evidence to date intriguingly suggests that, across a wide range of wood traits, cooperation may outweigh combat for these fungi.

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“…Among them, Paraconiothyrium variabile Riccioni, Damm, Verkley & Crous (LCP5644) appeared to be relatively specific to C. harringtonia and was used to carry out the biotransformation of juglone, a plant metabolite, into isosclerone, an important aromatic fungal pentaketide . Furthermore, the chemical communication between P. variabile and the phytopathogene Fusarium oxysporum was dissected by metabolomic means, showing the importance of fungal oxylipins during their competition (Combes et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

The fungal leaf endophyte Paraconiothyrium variabile specifically metabolizes the host-plant metabolome for its own benefit

et al. 2014

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Chemical Communication between the Endophytic Fungus Paraconiothyrium Variabile and the Phytopathogen Fusarium oxysporum

Cited by 80 publications

References 44 publications

Spatial mapping of lichen specialized metabolites using LDI-MSI: chemical ecology issues for Ophioparma ventosa

Spatial mapping of lichen specialized metabolites using LDI-MSI: chemical ecology issues for Ophioparma ventosa

Good neighbors aplenty: fungal endophytes rarely exhibit competitive exclusion patterns across a span of woody habitats

The fungal leaf endophyte Paraconiothyrium variabile specifically metabolizes the host-plant metabolome for its own benefit

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