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Quercus suber – P. cinnamomi interaction: hypothetical molecular mechanism model
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Orientador(es)
Resumo(s)
Phytophthora cinnamomi Rands is involved in the decline and mortality of Quercus suber L. and Quercus ilex L. in Southern
Europe, in particular in Portugal and Spain. The presence and spread of P. cinnamomi in these regions is a severe threat to
these oak ecosystems leading to expectable severe consequences for the production of cork and acorns in the near future.
Molecular mechanisms underlying oomycete-host interactions are poorly understood. As a first step to identify transcripts
involved in the Quercus suber – Phytophthora cinnamomi interaction, we applied complementary deoxyribonucleic acidamplified
fragment length polymorphism (cDNA-AFLP) methodology to cork oak seedlings infected with zoospores or
mycelium of P. cinnamomi.
Forty-four Quercus suber genes that were differentially expressed when exposed to Phytophthora cinnamomi were selected
and sequenced. Several of these genes were fully sequenced and the deduced aminoacid sequences showed consistent
homology with proteins involved in the defence mechanism of other plant species. These findings led to the design of a
simplified hypothetical model that illustrates the initial events of the interaction between Q. suber and P. cinnamomi.
Descrição
Palavras-chave
cDNA-AFLP Defense-response pathways Oak/oomycete interaction Pathogenesis related proteins Phytophthora cinnamomi
Contexto Educativo
Citação
Coelho, A. C.; Horta, M.; Ebadzad. G.; Cravador, Alfredo Quercus suber – P. cinnamomi interaction: hypothetical molecular mechanism model. New Zealand Journal of Forestry Science, 41S, 143-157, 2011.