Competition between cadmium and zinc in Glycine max (L) Merr

LV GALLARDO; CV GATICA AGUILAR; ML EGGEL; G RANDAZZO; ME CIMINARI; LB PENA; MV PÉREZ CHACA

San Juan

Congreso; LVI Reunión Científica Anual de la Sociedad de Biología de Cuyo; 2023

Sociedad de Biología de Cuyo

Anthropogenic contamination of soils by cadmium (Cd) is a global problem. Although cadmium is a non-essential element, it can enter plant tissues and possibly replace essential elements, causing cellular and molecular damage even at very low concentrations. Zinc (Zn) is an essential micronutrient for plants, but in high concentrations it causes alterations at a molecular, physiological and biochemical level. The objective was to evaluate the convenience of using Zn2+ in the phytoextraction of Cd from soils contaminated with the heavy metal. The Cd/Zn duo was studied in roots of Glycine max (L) Merr, evaluating modifications in the oxidative profile. Soybean roots developed for 9 days under hydroponic conditions in Hoagland nutrient solution were subjected to stress conditions with the two ions under study (Cd2+ and Zn2+) for an additional 7 days. We worked with Zn2+ concentrations between 0; 0.6 and 4.8 mM and with a constant CdCl2 concentration of 40 µM. As indicators of oxidative damage (MDA and carbonyl groups), the content of H2O2, and catalase (CAT) activity, as an antioxidant enzyme, were measured. A significant increase in the content of H2O2 and carbonyl groups were observed in the last treatments (Zn [4,8] with and without Cd) (p