¹³C/¹²C DISCRIMINATION MEASURED IN TARTRATE AND SUGARS IN MATURE GRAPEVINE BERRIES

Carbon discrimination expressed as ¹³C, is an indicator of water stress in the period of carbon assimilation. ¹³C values of tartrate and sugar of berries collected from vineyards with very contrasting climates are compared.
A significant relationship between ¹³C values and water stress is reported.
The grapevine water stress status before and after veraison can be evaluated by measuring ¹³C values of tartrate and sugar in mature berries.
The ¹³C values depend also on the rootstock and the variety.
The usefulness of this measure to characterize vineyard environmental characteristics is discussed.

I ISHS Workshop on Water Relations of Grapevines

J.-P. Gaudillère, K. van Leeuwen, N. Ollat, J.P. Goutouly, F. Champagnol

Water stress, Vitis vinifera L.

https://doi.org/10.17660/ActaHortic.1999.493.5