Caracterización del Cabernet-Sauvignon del Valle del Maipo (Chile) usando mediciones de fluorescencia

Virus infection in Vitis vinifera negatively impacts vineyard production and grape quality. Examples are grapevine leafroll-associated viruses (GLRaVs) rupestris stem pitting-associated (GRSPaV). We investigated transient fluorescence of chlorophyll a leaves Cabernet-Sauvignon, the primary red cultivar planted Chile, using OJIV test. First, we evaluated productive grapevines throughout their development, then analyzed same parameters plants infected with GLRaVs or GLRaVs+GRSPaV. observed that phenological as virus-affected clones, kinetics emission decreased, particularly values such Fo FM, reflecting limitation electron donation by oxygen-releasing complexes changes PSII antenna complex. The parameter most significant differences was performance index (PIABS), whose value decreases development is also lower compared to healthy plants. This decrease would indicate conversion light energy chemical heat dissipation, making PIABS an excellent evaluate vitality Cabernet-Sauvignon vineyards.