Iron inactivation by Sporobolomyces ruberrimus and its potential role in plant metal stress protection. An in vitro study

Jedrzejczyk, Roman J. ; Gustab, Maciej ; Wazny, Rafal ; Domka, Agnieszka ; Jodlowski, Przemyslaw J. ; Sitarz, Maciej ; Bezkosty, Patryk ; Kowalski, Michal ; Pawcenis, Dominika ; Jarosz, Kinga ; Sebastián, Víctor (Universidad de Zaragoza) ; Labaj, Pawel P. ; Rozpadek, Piotr

Resumen: The endophytic Basidiomycete Sporobolomyces ruberrimus protects its host Arabidopsis arenosa against metal toxicity. Plants inoculated with the fungus yielded more biomass and exhibited significantly fewer stress symptoms in medium mimicking mine dump conditions (medium supplemented with excess of Fe, Zn and Cd). Aside from fine-tuning plant metal homeostasis, the fungus was capable of precipitating Fe in the medium, most likely limiting host exposure to metal toxicity. The precipitated residue was identified by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), X-Ray Diffraction (XRD) and electron microscopy (SEM/TEM) with energy dispersive X-Ray analysis (EDX/SAED) techniques. The performed analyses revealed that the fungus transforms iron into amorphous (oxy)hydroxides and phosphates and immobilizes them in the form of a precipitate changing Fe behaviour in the MSR medium. Moreover, the complexation of free Fe ions by fungi could be obtained by biomolecules such as lipids, proteins, or biosynthesized redox-active molecules.

Idioma: Inglés

DOI: 10.1016/j.scitotenv.2023.161887

Año: 2023

Publicado en: SCIENCE OF THE TOTAL ENVIRONMENT 870 (2023), 161887 [16 pp.]
ISSN: 0048-9697

Factor impacto JCR: 8.2 (2023)

Categ. JCR: ENVIRONMENTAL SCIENCES rank: 31 / 358 = 0.087 (2023) - Q1 - T1

Factor impacto CITESCORE: 17.6 - Pollution (Q1) - Environmental Engineering (Q1) - Waste Management and Disposal (Q1) - Environmental Chemistry (Q1)

Factor impacto SCIMAGO: 1.998 - Environmental Chemistry (Q1) - Waste Management and Disposal (Q1) - Pollution (Q1) - Environmental Engineering (Q1)

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)