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Three Methods Assessing the Association of the Endophytic Entomopathogenic Fungus Metarhizium robertsii with Non-Grafted Grapevine Vitis vinifera

hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
hal.structure.identifierHochschule Geisenheim University
dc.contributor.authorPONCHON, Mathilde
hal.structure.identifierHochschule Geisenheim University
dc.contributor.authorREINEKE, Annette
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorMASSOT, Marie
hal.structure.identifierBrock University [Canada]
dc.contributor.authorBIDOCHKA, Michael
hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
dc.contributor.authorTHIÉRY, Denis
hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
dc.contributor.authorPAPURA, Daciana
dc.date.issued2022-12-09
dc.identifier.issn2076-2607
dc.description.abstractEnCharacterizing the association of endophytic insect pathogenic fungi (EIPF) with plants is an important step in order to understand their ecology before using them in biological control programs. Since several methods are available, it is challenging to identify the most appropriate for such investigations. Here, we used two strains of Metarhizium robertsii: EF3.5(2) native to the French vineyard environment and ARSEF-2575-GFP a laboratory strain expressing a green fluorescent protein, to compare their potential of association with non-grafted grapevine Vitis vinifera. Three methods were used to evaluate the kinetics of rhizosphere and grapevine endospheric colonization: (i) Droplet Digital (ddPCR), a sensitive molecular method of M. robertsii DNA quantification in different plant parts, (ii) culture-based method to detect the live fungal propagules from plant tissues that grew on the medium, (iii) confocal imaging to observe roots segments. Both strains showed evidence of establishment in the rhizosphere of grapevines according to the culture-based and ddPCR methods, with a significantly higher establishment of strain EF3.5(2) (40% positive plants and quantified median of exp(4.61) c/μL) compared to strain ARSEF-2575-GFP (13% positive plants and quantified median of exp(2.25) c/μL) at 96–98 days post-inoculation. A low incidence of association of both strains in the grapevine root endosphere was found with no significant differences between strains and evaluation methods (15% positive plants inoculated with strain EF3.5(2) and 5% with strain ARSEF-2575-GFP according to culture-based method). ddPCR should be used more extensively to investigate the association between plants and EIPF but always accompanied with at least one method such as culture-based method or confocal microscopy.
dc.language.isoen
dc.publisherMDPI
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.subject.enendophytes
dc.subject.enrhizosphere
dc.subject.enddPCR
dc.subject.enfungal entomopathogens
dc.title.enThree Methods Assessing the Association of the Endophytic Entomopathogenic Fungus Metarhizium robertsii with Non-Grafted Grapevine Vitis vinifera
dc.typeArticle de revue
dc.identifier.doi10.3390/microorganisms10122437
dc.subject.halSciences de l'environnement
dc.subject.halSciences du Vivant [q-bio]
bordeaux.journalMicroorganisms
bordeaux.page2437
bordeaux.volume10
bordeaux.issue12
bordeaux.peerReviewedoui
hal.identifierhal-04071793
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04071793v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Microorganisms&rft.date=2022-12-09&rft.volume=10&rft.issue=12&rft.spage=2437&rft.epage=2437&rft.eissn=2076-2607&rft.issn=2076-2607&rft.au=PONCHON,%20Mathilde&REINEKE,%20Annette&MASSOT,%20Marie&BIDOCHKA,%20Michael&THI%C3%89RY,%20Denis&rft.genre=article


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