Portal de Periódicos da CAPES

Changes in Phenolic Composition Induced by Pseudomonas savastanoi pv. Savastanoi Infection in Olive Tree: Presence of Large Amounts of Verbascoside in Nodules of Tuberculosis Disease

2006; American Chemical Society; Volume: 54; Issue: 15 Linguagem: Inglês

10.1021/jf060807w

1520-5118

José Antonio Cayuela, Mirela Rada, José Julián Ríos, T. Albi, Ángeles Guinda,

Phytochemicals and Antioxidant Activities

A study was carried out to determine the changes in phenolic composition induced by tuberculosis infection in olive trees. Four ethanolic extracts were compared: olive leaf from shoots affected by Pseudomonas savastanoi pv. Savastanoi, nodules induced by this bacteria, leaf from healthy (asymptomatic) shoots, and shoots. Among the differences found, the presence of a phenolic compound in nodules was significant in much larger quantities than in leaf or shoots. Mass spectrometric analysis showed this compound to be verbascoside. The enhancement of its biosynthesis could be related to the defense mechanisms of the tree in the nodules induced by P. savastanoi and suggests the possibility of exploration of natural and biotechnological sources of this compound. Keywords: Verbascoside; Pseudomonas savastanoi pv. savastanoi; olive tree tuberculosis