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Cravador, Alfredo

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  • Quercus suber infected by Phytophthora cinnamomi: effects at cellular level of cinnamomin on roots, stem and leaves
    Publication . Maia, I.; Medeira, C.; Melo, Eduardo P.; Cravador, A.
    Phytophthora cinnamomi has been reported to be regularly associated with cork and holm oak decline. This oomycete secretes elicitins, a group of unique highly conserved pr oteins that can enhance plant defence reactions.
  • Identification of an elicitin gene cluster in Phytophthora cinnamomi
    Publication . Duclos, J.; Fauconnier, A.; Coelho, A. C.; Bollen, A.; Cravador, A.; Godfroid, Edmond
    Elicitins are a group of highly conserved proteins secreted by species of Phytophthora and a species of the related genus Pythium, Pythium vexans. Some of these proteins act as inducers of the necrotic hypersensitive-like response and the associated systemic acquired resistance phenomenon, in some species. We cloned and characterised the cinnamomin-beta and -alpha genes and two related elicitin genes from Phytophthora cinnamomi. These four open reading frames (ORFs) are clustered in tandem pairs. Two out of these four genes present homologies with the basic and acidic elicitin groups; but the two others encode, if expressed, elicitin isoforms exhibiting homologies with the class II of highly acidic elicitins.