ROLE OF STILBENES AS A RESISTANCE FACTOR OF THE GRAPEVINE TOWARDS BIOTIC STRESS

作者: Maria Isabel , Van Zeller De Macedo Basto Gonçalves

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摘要: La vite e in grado di attivare meccanismi difesa risposta a stress biotici abiotici producendo principalmente metaboliti secondari tra i quali composti stilbenici. Questi composti, detti anche fitoalessine, hanno una azione benefica riconosciuta sulla salute umana. Una delle malattie che apporta piu danni tutto il mondo viticolo la peronospora, causata dal patogeno Plasmopara viticola L, questa tesi ha lo scopo confrontare le risposte diverse varieta cloni attaccate da questo patogeno. Sono state utilizzate foglie bacche 10 Cabernet Sauvignon per verificare l’andamento dell’infezione produzione degli stilbeni nel tempo. Stessa procedura stata applicata su giovani vecchie Muller-Thurgau, Chardonnay, Sangiovese, Pinot noir, Solaris. Queste sono monitorate dell’infezione, l’attivazione della stilbene sintasi. I risultati prove condotte evidenziato differenze e, soprattutto, diversi organi studiati.%%%%The grapevine is able to activate defence mechanism whenever it interacts with biotic or abiotic stress, mainly by producing substances as the stilbenic compounds, phytoalexins known for their health related influence. Combining this fact and knowledge that Berk et Curtis, causal agent of downy mildew, causes considerable damages worldwide Vitis vinifera L. production during its life cycle, thesis aims explore differences several varieties clones display when confronted pathogen. The leaves small berries different were used asses infection time course overtime. Likewise, young old Solaris, ordered assumed increasing resistance, assess course, on activation synthase gene. All trials conducted highlighted not only within but most importantly between studied organs.

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