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An Ulva armoricana extract protects plants against three powdery mildew pathogens

hal.structure.identifierUniversité Toulouse III - Paul Sabatier [UT3]
hal.structure.identifierGroupe Roullier
dc.contributor.authorJAULNEAU, Valérie
hal.structure.identifierUniversité Toulouse III - Paul Sabatier [UT3]
dc.contributor.authorLAFITTE, Claude
hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
dc.contributor.authorCORIO-COSTET, Marie-France
hal.structure.identifierUniversidade Federal de Santa Catarina = Federal University of Santa Catarina [Florianópolis] [UFSC]
dc.contributor.authorSTADNIK, Marciel J.
hal.structure.identifierGroupe Roullier
dc.contributor.authorSALAMAGNE, Sylvie
hal.structure.identifierGroupe Roullier
dc.contributor.authorBRIAND, Xavier
hal.structure.identifierUniversité Toulouse III - Paul Sabatier [UT3]
dc.contributor.authorESQUERRÉ-TUGAYÉ, Marie-Thérèse
hal.structure.identifierInteractions Microbiennes dans la Rhizosphère et les Racines
dc.contributor.authorDUMAS, Bernard
dc.date.accessioned2024-04-08T12:30:49Z
dc.date.available2024-04-08T12:30:49Z
dc.date.issued2011
dc.identifier.issn0929-1873
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/197040
dc.description.abstractEnThe protective activity of a crude extract prepared from the green macroalga, Ulva armoricana, previously shown to induce plant defence responses, was evaluated on three plant species, common bean, grapevine and cucumber, cultivated in the greenhouse and inoculated with three powdery mildew pathogens Erysiphe polygoni, E. necator and Sphareotheca fuliginea respectively. Chemical analyses showed that the extract was enriched in ulvans, which are green algae polysaccharides essentially composed of uronic acid and sulphated rhamnose. Weekly applications were performed by spraying of the green algal extract at various dilutions on bean, grapevine and cucumber leaves. A significant effect (50% protection) was observed using a dilution corresponding to about 3 gl(-1) dry matter and up to 90% reduction of symptom severity was obtained for the highest concentration (1/9 dilution, 6 gl(-1) dry matter) for the three plant species. To study the natural variability of the protective activity, five extracts prepared from algae batches harvested at different year periods were evaluated. Although polysaccharide composition varied among batches, all extracts elicit a reporter gene regulated by a defence-gene promoter in a transgenic tobacco line, and protect cucumber plants against powdery mildew infection. Together, these data demonstrate that U. armoricana is a reproducible source of active compounds which can be used to efficiently protect crop plants against powdery mildew diseases.
dc.language.isoen
dc.publisherSpringer Verlag
dc.subjectPolysaccharides
dc.subjectplant sciences
dc.subjectagriculture
dc.subject.enPlant immunity
dc.subject.enElicitor
dc.subject.enPowdery mildew
dc.subject.enAlgae
dc.subject.enagronomy
dc.subject.enhorticulture
dc.title.enAn Ulva armoricana extract protects plants against three powdery mildew pathogens
dc.typeArticle de revue
dc.identifier.doi10.1007/s10658-011-9816-0
dc.subject.halSciences du Vivant [q-bio]
bordeaux.journalEuropean Journal of Plant Pathology
bordeaux.page393 - 401
bordeaux.volume131
bordeaux.hal.laboratoriesSanté et Agro-Ecologie du Vignoble (SAVE) - UMR 1065*
bordeaux.issue3
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-02653121
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02653121v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=European%20Journal%20of%20Plant%20Pathology&rft.date=2011&rft.volume=131&rft.issue=3&rft.spage=393%20-%20401&rft.epage=393%20-%20401&rft.eissn=0929-1873&rft.issn=0929-1873&rft.au=JAULNEAU,%20Val%C3%A9rie&LAFITTE,%20Claude&CORIO-COSTET,%20Marie-France&STADNIK,%20Marciel%20J.&SALAMAGNE,%20Sylvie&rft.genre=article


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