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Screening of Stevia rebaudiana (Bertoni) susceptibility to Septoria steviae through leaf disk inoculation

hal.structure.identifierTerres Inovia
dc.contributor.authorLE BIHAN, Zoé
hal.structure.identifierUnité de Pathologie Végétale [PV]
dc.contributor.authorGAUDIN, Jonathan
hal.structure.identifierUniversity of Zanjan [ZNU]
dc.contributor.authorRASOULI, Diako
hal.structure.identifierBiologie du fruit et pathologie [BFP]
dc.contributor.authorBOUTET, Solene
hal.structure.identifierBiologie du fruit et pathologie [BFP]
dc.contributor.authorLAURENCON, Marianne
hal.structure.identifierBiologie du fruit et pathologie [BFP]
dc.contributor.authorCOSSON, Patrick
hal.structure.identifierOviatis SA, Lacaussade, France
dc.contributor.authorHASTOY, Cecile
hal.structure.identifierBiologie du fruit et pathologie [BFP]
dc.contributor.authorROLIN, Dominique
hal.structure.identifierBiologie du fruit et pathologie [BFP]
dc.contributor.authorSCHURDI-LEVRAUD, Valerie
dc.date.issued2025-01-20
dc.identifier.issn1535-1025
dc.description.abstractEnStevia rebaudiana Bertoni is a perennial cultivated plant that produces steviol glycosides, natural acaloric sweet compounds in its leaves. Many pathogens are capable of infecting this species. Among these pathogens, Septoria steviae, the causal agent of Septoria Leaf Spot, is the most widely described on S. rebaudiana. The objective of this study is to validate a leaf disk screening method for S. rebaudiana response to Septoria steviae infection on 10 S. rebaudiana genotypes with contrasting responses to the fungus. Three independent experiments were carried out in which forty leaf discs per genotype were infected with an inoculum at a concentration of 105 conidia / mL or with water. The response of the 10 genotypes was scored through image analysis. Image analysis was conducted at 9, 12, 15, 18 and 21 days after inoculation (DAI), allowing the proportion of symptomatic foliar area (PLSA) and AUDPC to be quantified. The evaluation of symptom speed development was realized through a linear regression between PLSA and time, for each tested genotype. Genotypes exhibited the lowest susceptibility at 21 DAI, with Cult102_SPA and Cult76_GER displaying 3% of the surface symptomatic. Genotypes with the highest susceptibility were Cult33_FRA and Cult75_GER, with 24% severity. These results correlate with visual scoring performed at 21 DAI and with previous inoculation protocols on S. rebaudiana cuttings, by maintaining the ranking of the different genotypes whatever the test. The development of a leaf-disk inoculation method offers new avenues for breeding strategies to develop tolerant or resistant S. rebaudiana cultivars.
dc.language.isoen
dc.publisherPlant Management Network International
dc.subject.enStevia rebaudiana
dc.subject.enSeptoria steviae
dc.subject.enleaf-disk inoculation
dc.subject.enAUDPC : Area Under Disease Progressive Curve
dc.subject.enPLSA : proportion of leaves symptomatic area
dc.title.enScreening of Stevia rebaudiana (Bertoni) susceptibility to Septoria steviae through leaf disk inoculation
dc.typeArticle de revue
dc.identifier.doi10.1094/PHP-04-24-0039-RS
dc.subject.halSciences du Vivant [q-bio]/Biologie végétale/Phytopathologie et phytopharmacie
dc.subject.halSciences du Vivant [q-bio]/Microbiologie et Parasitologie
dc.subject.halSciences du Vivant [q-bio]/Microbiologie et Parasitologie/Mycologie
bordeaux.journalPlant health progress
bordeaux.page136-145
bordeaux.volume26
bordeaux.peerReviewedoui
hal.identifierhal-04988247
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04988247v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Plant%20health%20progress&rft.date=2025-01-20&rft.volume=26&rft.spage=136-145&rft.epage=136-145&rft.eissn=1535-1025&rft.issn=1535-1025&rft.au=LE%20BIHAN,%20Zo%C3%A9&GAUDIN,%20Jonathan&RASOULI,%20Diako&BOUTET,%20Solene&LAURENCON,%20Marianne&rft.genre=article


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