Adaptación al calentamiento climático de veinte variedades de vid, minoritarias de la DOCa Rioja, por su potencial de acidez

Abstract

Climate change is mainly manifested through an increase in temperature and affects all the world’s vineyards, obtaining wines with higher alcohol content and whose pH is increasing. High temperatures accelerate the decrease in acidity, especially due to the rapid degradation of malic acid, but the concentration of tartaric acid is much less sensitive to high temperature. Thus, varieties with a high tartaric / malic ratio are better suited to climate warming conditions. In the present work, we deal with the behavior of twenty red, pink and white minor varieties of DOCa Rioja, in relation to their capacity to produce wines with higher levels of acidity. The most interesting minority varieties in the face of the climatic warming due to their high acidity potential were, among the red and pink varieties, Garnacha Roya, Alicante Bouschet, Trepat, Morate and Agawan, and, among the white varieties, Maturana Blanca, Garnacha Blanca and Tempranillo Blanco