Effects of Chromium Toxicity on Physiological Performance and Nutrient Uptake in Two Grapevine Cultivars (Vitis vinifera L.) Growing on Own Roots or Grafted onto Different Rootstocks

Chromium toxicity is considered within the most severe and dangerous nutritional disorders, it can often be observed in crops grown industrial areas. The present study aims to determine effects of Cr(VI) on growth, nutrition, physiological performance grapevines. In a pot hydroponic experiment, own-rooted Merlot Cabernet Franc grapevine cultivars or grafted onto 1103P 101-14 Mgt rootstocks were exposed 120 ?M Cr(VI). Leaf interveinal chlorosis appeared after forty-five days treatment. Overall leaf brown root coloration sixty was reported. A significant effect majority measured parameters due treatment observed. stress increased total Cr concentrations all parts vines, i.e., leaves, shoots, roots, trunks. When comparing between studied plant sections, roots presented highest concentrations, ranging from 396 868 mg kg?1 d. w., then, descending order, ranged 41 102 w. trunks, 2.0 3.3 1.9 3.0 shoots. Between assessed rootstocks, identified better excluder concentration other aerial vines. Additionally, chromium negatively affected compartmentalization important nutrients. chlorophyll (Chl) decreased down approximately 53% stress. significantly reduced stem water potential (SWP), net CO2 assimilation rate (A), stomatal conductance (gs), PSII maximum quantum yield cases At this stage, phenolic content 46.14% vines 75.91%