Insights into the physiological and biochemical responses of peanut plants under combined arsenic and flooding stress

• Autores: Bianucci, Eliana Carolina; Furlan, Ana Laura; Llugany, Mercè; Poschenrieder, Charlotte; Tolrà, Roser
• Año de publicación: 2025
• Idioma: inglés
• Tipo de recurso: artículo
• Materia: ARSENIC; FLOODING; OXIDATIVE STRESS; MORPHOPHYSIOLOGY
• Institución: Consejo Nacional de Investigaciones Científicas y Técnicas

Plants in nature constantly face multiple simultaneous stresses. In this study, we assessed for the first time the impact of environmentally relevant arsenic (As) concentrations combined with a flooding (F) event on peanut plants. We analyzed growth, nodulation, mineral composition, redox metabolism, oxidative damage, organic acid levels, and phytohormone concentrations. Each treatment, whether applied alone or combined, elicited distinct responses in roots and leaves. Peanut plants exhibited increased reactive oxygen species (ROS) production under all treatments, resulting in oxidative stress, disruptions in organic acid metabolism, and changes in hormone profiles. The responses were more severe under combined As + F stress than under individual stress treatments, indicating synergistic effects. The different stress treatments operated through distinct pathways. Arsenic caused metalloid toxicity, triggering oxidative stress and disrupting vital processes. In contrast, flooding-induced stress was attributed to oxygen deprivation, forcing a metabolic shift from aerobic respiration to fermentation, ultimately leading to oxidative stress. This study highlights the complex interactions between individual and combined stresses, which can lead to either additive or synergistic effects. Despite consistent declines in growth and key physiological processes like photosynthesis, the specific response mechanisms varied depending on the type of stress imposed, with combined stress exerting the most severe effects.
Fil: Bianucci, Eliana Carolina. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Instituto de Investigaciones Agrobiotecnológicas. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Agrobiotecnológicas; Argentina
Fil: Furlan, Ana Laura. Universidad Nacional de Rio Cuarto. Facultad de Cs.exactas Fisicoquimicas y Naturales. Instituto de Investigaciones Agrobiotecnologicas. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Cordoba. Instituto de Investigaciones Agrobiotecnologicas.; Argentina
Fil: Llugany, Mercè. No especifíca;
Fil: Poschenrieder, Charlotte. No especifíca;
Fil: Tolrà, Roser. No especifíca;