Parâmetros fisiológicos em videiras 'Paulsen 1103' (Vitis berlandieri x Vitis rupestris) inoculadas com fungos micorrízicos arbusculares em solo contaminado com cobre

Abstract

The application of foliar fungicide in vineyards increases the copper content (Cu) in the soil, which can modify physiological parameters of young vines transplanted in soil vineyards eradicated. The inoculation with mycorrhizal fungi (AMF) can reduce the availability of Cu to vines and thereby reduce the toxic effect of Cu in the cells of young plants. The study aimed to evaluate physiological changes in rootstock grapevine 'P1103' (Vitis berlandieri x Vitis rupestris) grown in soil with high Cu content inoculated with AMF species. The experiment was conducted in a greenhouse. The vines were placed in pots. At the time of transplantation, the roots were inoculated with the AMF: Dentiscutata heterogama, Acaulospora morrowiae and Rhizophagus clarus, plus a control treatment, non-inoculated. The experiment was conducted in randomized blocks with seven replicates. The cultivation was carried out for 76 days, and at the end it was evaluated plant height, leaf area, gas exchange rates, mycorrhizal colonization, dry matter of roots, stem and leaf; number of leaves, stem diameter, total soluble carbohydrate content, total starch, chlorophyll a, b and total, carotenoids, Cu and P content in plants. Among the evaluated FMA, R. clarus promoted greater benefit to the plant growth and reduced the Cu content in the tissues. The highest CO2assimilation rates and stomatal conductance occurred in plants inoculated with D. heterogama. AMF studied eased the toxicity of copper to young vines.