Risposte a stress idrico/azotato in due portinnesti di vite innestati con vitigno Gaglioppo in sistemi confinati.

Water and nitrogen availability are two environmental constraints that limit grapevine growth and productivity. In this respect, the aim of the present work was to evaluate plant-soil interactions on Gaglioppo vine, representative of Cirò DOC, grafted on two grapevine rootstocks, 1103 Paulsen and 17-37, exposed to nitrogen and water deficit, supplied individually or in combination. Selected soil proprieties and root morphology of the rootstocks, were analyzed in a microcosm system. The results showed that the treatments significantly influenced electrical conductivity (EC), but not pH and organic matter (TOC). Although, ammonium exchange capacity showed higher values, it did not vary overtime. Moreover, root morphology of grapevine rootstocks showed different responses to stress conditions. In particular, total root length of 1103 Paulsen rootstock was not significantly affected by both stress, whereas a significant reduction was recorded in 17-37 genotype. Finesses could be considered a root morphological trait responsible to 1103 Paulsen rootstock adaptation to nitrogen and water stress.