Comparison of Salt Exclusion in Muscadine and Interspecific Hybrid Grapes Using a Greenhouse Screening Procedure

Bunch grapes ( Euvitis ) are classified as moderately salt-tolerant. However, little is known about the salt tolerance of muscadine Vitis rotundifolia ). The objective this research was to evaluate exclusion capacity relative common bunch grape rootstocks and hybrid winegrapes using a greenhouse screening assay. In two separate experiments, 31 muscadine, six rootstocks, five winegrape cultivars were irrigated daily with 25-m m sodium chloride solution for period 14 d, followed by destructive harvest determine (Na) (Cl) concentrations in root shoot tissues. Generally, muscadines studied exhibited greater range concentration rootstocks. Total tissue (shoot root) varied 250% 430% across 180% 190% Na Cl, respectively. Despite wider range, expressed significantly less leaf necrosis than most effective salt-excluding muscadines, ‘Janebell’, ‘Scuppernong’, ‘Late Fry’, ‘Eudora’, not distinguishable from [‘Paulsen 1103’ (1103P), ‘Ruggeri 140’ (140Ru), ‘Schwarzmann’, ‘Millardet et de Grasset 101-14’ (101-14 Mgt.), 420A’ (420A), ‘Matador’]. Overall, there no discernable difference between grapes. ‘Blanc Du Bois’ displayed poor Cl properties but showed only moderate symptoms. both accumulated more two-fold higher compared best-performing (1103P, 140Ru, 101-14 suggesting that could benefit grafting if salinity limiting factor.