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Cryptogein and capsicein promote defence responses in Quercus suber against Phytophthora cinnamomi infection

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dc.contributor.authorMedeira, C.
dc.contributor.authorQuartin, V.
dc.contributor.authorMaia, I.
dc.contributor.authorDiniz, I.
dc.contributor.authorMatos, M.
dc.contributor.authorSemedo, J.
dc.contributor.authorScotti Campos, P.
dc.contributor.authorRamalho, J. C.
dc.contributor.authorPais, Isabel P.
dc.contributor.authorRamos, P.
dc.contributor.authorMelo, Eduardo P.
dc.contributor.authorLeitao, A.
dc.contributor.authorCravador, A.
dc.date.accessioned2015-06-15T09:15:49Z
dc.date.available2015-06-15T09:15:49Z
dc.date.issued2012
dc.description.abstractThe decline of cork oak (Quercus suber) stands in Iberian Peninsula is associated with infection by Phytophthora cinnamomi. Most Phytophthora species secrete elicitins, which can enhance defence reactions against some pathogens. Here cytological and physiological effects of the elicitins cryptogein and capsicein on cork oak root infection by P. cinnamomi were evaluated. The progression of the pathogen in root tissue and its effects on total fatty acid (TFA) composition of roots and leaves were analysed in seedlings. Net photosynthesis (P (n) ), stomatal conductance (g (s) ), chlorophyll a fluorescence measurements (quantum yield of linear electron transport I center dot (e) , photochemical quenching q (P,) non-photochemical quenching NPQ) and carotenoid determinations were carried out in well established (4 months) plants. In elicitin-treated roots, 2 days after inoculation, the pathogen which presented loss of viability and membrane degradation was mainly restricted to the intercellular spaces of the cortical parenchyma, and did not reach the vascular cylinder. Electron dense materials accumulated in the intercellular spaces of the cortex next to disorganized hyphae, suggested to be related with defence reactions. Cryptogein (or its interaction with P. cinnamomi) induced enhanced lipid synthesis in leaves, which may contribute to preserve membrane stability. P. cinnamomi decreased P (n) , g (s) , I center dot (e) , and q (P), whereas elicitin-treated plants displayed values similar to controls. Overall, the results indicated a resistance response of cork oak against this oomycete, induced by the elicitins.
dc.identifier.doihttps://dx.doi.org/10.1007/s10658-012-9972-x
dc.identifier.issn0929-1873
dc.identifier.otherAUT: ACR00659;
dc.identifier.urihttp://hdl.handle.net/10400.1/6125
dc.language.isoeng
dc.peerreviewedyes
dc.publisherSpringer
dc.relation.isbasedonP-002-601
dc.titleCryptogein and capsicein promote defence responses in Quercus suber against Phytophthora cinnamomi infection
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage159
oaire.citation.startPage145
oaire.citation.titleEuropean Journal of Plant Pathology
oaire.citation.volume134
person.familyNameCravador
person.givenNameAlfredo
person.identifier.orcid0000-0002-9831-9815
person.identifier.ridK-7247-2012
person.identifier.scopus-author-id6602537257
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublication8c84a9e6-6b7f-4b50-93a2-152c85901722
relation.isAuthorOfPublication.latestForDiscovery8c84a9e6-6b7f-4b50-93a2-152c85901722

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