Asaia symbionts interfere with infection by Flavescence dorée phytoplasma in leafhoppers

Handle URI:
http://hdl.handle.net/10754/627378
Title:
Asaia symbionts interfere with infection by Flavescence dorée phytoplasma in leafhoppers
Authors:
Gonella, Elena; Crotti, Elena; Mandrioli, Mauro; Daffonchio, Daniele ( 0000-0003-0947-925X ) ; Alma, Alberto
Abstract:
The transmission of microbial pathogens by insect vectors can be affected by the insect’s microbial symbionts, which may compete in colonizing organs, express antagonistic factors or activate host immune response. Acetic acid bacteria of the genus Asaia are symbionts of the leafhopper Scaphoideus titanus, which transmits Flavescence dorée phytoplasma. These bacteria could be used as control agents against the disease. Here, we experimentally investigated the interaction between different strains of Asaia and phytoplasma transmission in the laboratory by using the model leafhopper Euscelidius variegatus and the plant host Vicia faba. We found that uncultivable and low concentrations of Asaia phylotypes were associated with E. variegatus. When we supplied different Asaia strains isolated from other insects and exhibiting different phenotypes to E. variegatus orally, the bacteria stably colonized the leafhopper, reached relatively higher densities and could then be isolated from the host. We conducted transmission trials of Flavescence dorée phytoplasma with individuals colonized with three exogenous Asaia strains. When the phytoplasma became established in the bodies of E. variegatus, leafhoppers were able to transmit it to broad beans, with transmission rates ranging from 33 to 76% in different experiments. However, leafhoppers that were colonized by one of the Asaia strains producing an air–liquid interface biofilm exhibited significantly reduced phytoplasma acquisition, with infection rates at 5–28%, whereas they were 25–77% in control insects. Although the mechanisms regulating this interference remain to be elucidated, our results provide evidence of the potential use of Asaia as a biocontrol agent.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Bioscience Program
Citation:
Gonella E, Crotti E, Mandrioli M, Daffonchio D, Alma A (2018) Asaia symbionts interfere with infection by Flavescence dorée phytoplasma in leafhoppers. Journal of Pest Science. Available: http://dx.doi.org/10.1007/s10340-018-0973-1.
Publisher:
Springer Nature
Journal:
Journal of Pest Science
Issue Date:
20-Mar-2018
DOI:
10.1007/s10340-018-0973-1
Type:
Article
ISSN:
1612-4758; 1612-4766
Sponsors:
The authors are grateful to Federico Lessio and Luca Picciau for their essential help in insect rearing and laboratory activities. This work was supported by the ‘INTEFLAVI’ (Un approccio integrato alla lotta contro la flavescenza dorata della vite) project. D.D. thanks King Abdullah University of Science and Technology for support through baseline research funds. The authors thank Prof. Guido Favia for providing A. stephensi samples. Funding was provided by Fondazione Cassa di Risparmio di Cuneo.
Additional Links:
https://link.springer.com/article/10.1007%2Fs10340-018-0973-1
Appears in Collections:
Articles; Bioscience Program; Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorGonella, Elenaen
dc.contributor.authorCrotti, Elenaen
dc.contributor.authorMandrioli, Mauroen
dc.contributor.authorDaffonchio, Danieleen
dc.contributor.authorAlma, Albertoen
dc.date.accessioned2018-03-22T13:46:03Z-
dc.date.available2018-03-22T13:46:03Z-
dc.date.issued2018-03-20en
dc.identifier.citationGonella E, Crotti E, Mandrioli M, Daffonchio D, Alma A (2018) Asaia symbionts interfere with infection by Flavescence dorée phytoplasma in leafhoppers. Journal of Pest Science. Available: http://dx.doi.org/10.1007/s10340-018-0973-1.en
dc.identifier.issn1612-4758en
dc.identifier.issn1612-4766en
dc.identifier.doi10.1007/s10340-018-0973-1en
dc.identifier.urihttp://hdl.handle.net/10754/627378-
dc.description.abstractThe transmission of microbial pathogens by insect vectors can be affected by the insect’s microbial symbionts, which may compete in colonizing organs, express antagonistic factors or activate host immune response. Acetic acid bacteria of the genus Asaia are symbionts of the leafhopper Scaphoideus titanus, which transmits Flavescence dorée phytoplasma. These bacteria could be used as control agents against the disease. Here, we experimentally investigated the interaction between different strains of Asaia and phytoplasma transmission in the laboratory by using the model leafhopper Euscelidius variegatus and the plant host Vicia faba. We found that uncultivable and low concentrations of Asaia phylotypes were associated with E. variegatus. When we supplied different Asaia strains isolated from other insects and exhibiting different phenotypes to E. variegatus orally, the bacteria stably colonized the leafhopper, reached relatively higher densities and could then be isolated from the host. We conducted transmission trials of Flavescence dorée phytoplasma with individuals colonized with three exogenous Asaia strains. When the phytoplasma became established in the bodies of E. variegatus, leafhoppers were able to transmit it to broad beans, with transmission rates ranging from 33 to 76% in different experiments. However, leafhoppers that were colonized by one of the Asaia strains producing an air–liquid interface biofilm exhibited significantly reduced phytoplasma acquisition, with infection rates at 5–28%, whereas they were 25–77% in control insects. Although the mechanisms regulating this interference remain to be elucidated, our results provide evidence of the potential use of Asaia as a biocontrol agent.en
dc.description.sponsorshipThe authors are grateful to Federico Lessio and Luca Picciau for their essential help in insect rearing and laboratory activities. This work was supported by the ‘INTEFLAVI’ (Un approccio integrato alla lotta contro la flavescenza dorata della vite) project. D.D. thanks King Abdullah University of Science and Technology for support through baseline research funds. The authors thank Prof. Guido Favia for providing A. stephensi samples. Funding was provided by Fondazione Cassa di Risparmio di Cuneo.en
dc.publisherSpringer Natureen
dc.relation.urlhttps://link.springer.com/article/10.1007%2Fs10340-018-0973-1en
dc.rightsThe final publication is available at Springer via http://dx.doi.org/10.1007/s10340-018-0973-1en
dc.subjectFlavescence doréeen
dc.subjectAcetic acid bacteriaen
dc.subjectVector competenceen
dc.subjectSymbiotic controlen
dc.titleAsaia symbionts interfere with infection by Flavescence dorée phytoplasma in leafhoppersen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentBioscience Programen
dc.identifier.journalJournal of Pest Scienceen
dc.eprint.versionPost-printen
dc.contributor.institutionDipartimento di Scienze Agrarie, Forestali e Alimentari (DISAFA), Università degli Studi di Torino, Grugliasco (TO), Italyen
dc.contributor.institutionDipartimento di Scienze per gli Alimenti, la Nutrizione e l’Ambiente (DeFENS), Università degli Studi di Milano, Milan, Italyen
dc.contributor.institutionDipartimento di Scienze della Vita (DSV), Università degli Studi di Modena e Reggio Emilia, Modena, Italyen
kaust.authorDaffonchio, Danieleen
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