Insights into the physiological and biochemical responses of peanut plants under combined arsenic and flooding stress
Bianucci, Eliana Carolina (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)
Furlan, Ana Laura (Universidad Nacional de Río Cuarto)
Llugany i Ollé, Mercè (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)
Poschenrieder, Charlotte (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)
Tolrà Pérez, Roser (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)

Data:	2025
Resum:	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.
Ajuts:	Agencia Estatal de Investigación PID2019-104000RB-I00
Nota:	Altres ajuts: acords transformatius de la UAB
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Arsenic ; Legume ; Nodulation ; Oxidative stress ; Waterlogging
Publicat a:	Plant Physiology and Biochemistry, Vol. 228 (November 2025) , art. 110266, ISSN 1873-2690

DOI: 10.1016/j.plaphy.2025.110266

14 p, 3.8 MB

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