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Combined field inoculations of pseudomonas bacteria, arbuscular mycorrhizal fungi, and entomopathogenic nematodes and their effects on wheat performance

2017-10Journal article Open access
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dc.contributor.authorImperiali, Nicola
dc.contributor.authorChiriboga, Xavier
dc.contributor.authorSchlaeppi, Klaus
dc.contributor.authorFesselet, Marie
dc.contributor.authorVillacres, Daniela
dc.contributor.authorJaffuel, Geoffrey
dc.contributor.authorBender, S. Franz
dc.contributor.authorDennert, Francesca
dc.contributor.authorBlanco-Perez, Ruben
dc.contributor.authorvan der Heijden, Marcel G. A.
dc.contributor.authorMaurhofer, Monika
dc.contributor.authorMascher, Fabio
dc.contributor.authorTurlings, Ted C. J.
dc.contributor.authorKeel, Christoph J.
dc.contributor.authorCampos-Herrera, Raquel
dc.date.accessioned2018-12-07T14:58:09Z
dc.date.available2018-12-07T14:58:09Z
dc.date.issued2017-10
dc.description.abstractIn agricultural ecosystems, pest insects, pathogens, and reduced soil fertility pose major challenges to crop productivity and are responsible for significant yield losses worldwide. Management of belowground pests and diseases remains particularly challenging due to the complex nature of the soil and the limited reach of conventional agrochemicals. Boosting the presence of beneficial rhizosphere organisms is a potentially sustainable alternative and may help to optimize crop health and productivity. Field application of single beneficial soil organisms has shown satisfactory results under optimal conditions. This might be further enhanced by combining multiple beneficial soil organisms, but this remains poorly investigated. Here, we inoculated wheat plots with combinations of three beneficial soil organisms that have different rhizosphere functions and studied their effects on crop performance. Plant beneficial Pseudomonas bacteria, arbuscular mycorrhizal fungi (AMF), and entomopathogenic nematodes (EPN), were inoculated individually or in combinations at seeding, and their effects on plant performance were evaluated throughout the season. We used traditional and molecular identification tools to monitor their persistence over the cropping season in augmented and control treatments, and to estimate the possible displacement of native populations. In three separate trials, beneficial soil organisms were successfully introduced into the native populations and readily survived the field conditions. Various Pseudornonas, mycorrhiza, and nematode treatments improved plant health and productivity, while their combinations provided no significant additive or synergistic benefits compared to when applied alone. EPN application temporarily displaced some of the native EPN, but had no significant long-term effect on the associated food web. The strongest positive effect on wheat survival was observed for Pseudomonas and AMF during a season with heavy natural infestation by the frit fly, Oscinella frit, a major pest of cereals. Hence, beneficial impacts differed between the beneficial soil organisms and were most evident for plants under biotic stress. Overall, our findings indicate that in wheat production under the test conditions the three beneficial soil organisms can establish nicely and are compatible, but their combined application provides no additional benefits. Further studies are required, also in other cropping systems, to fine-tune the functional interactions among beneficial soil organisms, crops, and the environment.
dc.identifier.doi10.3389/fpls.2017.01809
dc.identifier.issn1664-462X
dc.identifier.urihttp://hdl.handle.net/10400.1/11884
dc.language.isoeng
dc.peerreviewedyes
dc.publisherFrontiers Media Sa
dc.relationMediterranean ecosystem as a model in the development of molecular and ecological approaches for the study of multitrophic interactions in the soil: ecosystem services and biocontrol enhancement
dc.subjectReal time Pcr
dc.subjectBiological control
dc.subjectFluorescent pseudomonads
dc.subjectAgricultural soils
dc.subjectBiocontrol strain
dc.subjectRoot rot
dc.subjectGrowth
dc.subjectRhizosphere
dc.subjectPersistence
dc.subjectEcology
dc.titleCombined field inoculations of pseudomonas bacteria, arbuscular mycorrhizal fungi, and entomopathogenic nematodes and their effects on wheat performance
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleMediterranean ecosystem as a model in the development of molecular and ecological approaches for the study of multitrophic interactions in the soil: ecosystem services and biocontrol enhancement
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/Investigador FCT/IF%2F00552%2F2014%2FCP1234%2FCT0007/PT
oaire.citation.startPage1809
oaire.citation.titleFrontiers in Plant Science
oaire.citation.volume8
oaire.fundingStreamInvestigador FCT
person.familyNameCampos-Herrera
person.givenNameRaquel
person.identifier75402
person.identifier.orcid0000-0003-0852-5269
person.identifier.ridA-5299-2017
person.identifier.scopus-author-id16318511600
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccess
rcaap.typearticle
relation.isAuthorOfPublication28736fd2-ac4e-43ac-84e0-51a1a10ffc28
relation.isAuthorOfPublication.latestForDiscovery28736fd2-ac4e-43ac-84e0-51a1a10ffc28
relation.isProjectOfPublication083241da-257d-47c5-8bf1-27fecdf635e8
relation.isProjectOfPublication.latestForDiscovery083241da-257d-47c5-8bf1-27fecdf635e8

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