RARE GRAPE VARIETAL RESOURCE

Argamussa’ was the cultivar with highest WUE under water stress, because of a stronger stomatal adjustment under those conditions, maintaining high net photosynthesis rates. This cultivar also showed a very low stem water potential (-1.48 MPa). The higher capacity of carbon fixation of this cultivar under water stress, was reflected in a high plant yield (7.8 kg grape per plant), although sugar concentration in must was very low. Certain relationships were obtained between leaf carbon fixation and total yield and sugar content in must. (Source: https://www.ishs.org/ishs-article/931_15)

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