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Artículo

Magnetite nanoparticles coated with citric acid are not phytotoxic and stimulate soybean and alfalfa growth

Iannone, María FlorenciaIcon ; Groppa, María DanielaIcon ; Zawoznik, Myriam Sara; Coral, Diego FernandoIcon ; Fernández van Raap, Marcela BeatrizIcon ; Benavides, Maria PatriciaIcon
Fecha de publicación: 03/2021
Editorial: Academic Press Inc Elsevier Science
Revista: Ecotoxicology and Environmental Safety
ISSN: 0147-6513
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Nanotecnología

Resumen

In this work, the internalization and distribution of citric acid-coated magnetite nanoparticles (here, Fe3O4-NPs) in soybean and alfalfa tissues and their effects on plant growth were studied. Both legumes were germinated in pots containing an inert growing matrix (vermiculite) to which Hoagland solution without (control, C), with Fe3O4-NPs (50 and 100 mg iron L−1, NP50 and NP100), or with the same amount of soluble iron supplied as Fe-EDTA (Fe50, Fe100) was added once before sowing. Then, plants were watered with the standard nutrient solution. The observation of superparamagnetic signals in root tissues at harvest (26 days after emergence) indicated Fe3O4-NPs uptake by both legumes. A weak superparamagnetic signal was also present in the stems and leaves of alfalfa plants. These findings suggest that Fe3O4-NPs are readily absorbed but not translocated (soybean) or scarcely translocated (alfalfa) from the roots to the shoots. The addition of both iron sources resulted in increased root weight; however, only the addition of Fe3O4-NPs resulted in significantly higher root surface; shoot weight also increased significantly. As a general trend, chlorophyll content enhanced in plants grown in vermiculite supplemented with extra iron at pre-sowing; the greatest increase was observed with NP50. The only antioxidant enzyme significantly affected by our treatments was catalase, whose activity increased in the roots and shoots of both species exposed to Fe3O4-NPs. However, no symptoms of oxidative stress, such as increased lipid peroxidation or reactive oxygen species accumulation, were evidenced in any of these legumes. Besides, no evidence of cell membrane damage or cell death was found. Our results suggest that citric acid-coated Fe3O4-NPs are not toxic to soybean and alfalfa; instead, they behave as plant growth stimulators.
Palabras clave: ALFALFA , GROWTH , IRON NANOPARTICLES , OXIDATIVE STRESS , SOYBEAN , TRANSLOCATION
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Atribución-NoComercial-SinDerivadas 2.5 Argentina (CC BY-NC-ND 2.5 AR)
Identificadores
URI: http://hdl.handle.net/11336/181070
URL: https://www.sciencedirect.com/science/article/pii/S0147651321000531
DOI: http://dx.doi.org/10.1016/j.ecoenv.2021.111942
Colecciones
Articulos(IFLP)
Articulos de INST.DE FISICA LA PLATA
Articulos(IQUIFIB)
Articulos de INST.DE QUIMICA Y FISICO-QUIMICA BIOLOGICAS "PROF. ALEJANDRO C. PALADINI"
Citación
Iannone, María Florencia; Groppa, María Daniela; Zawoznik, Myriam Sara; Coral, Diego Fernando; Fernández van Raap, Marcela Beatriz; et al.; Magnetite nanoparticles coated with citric acid are not phytotoxic and stimulate soybean and alfalfa growth; Academic Press Inc Elsevier Science; Ecotoxicology and Environmental Safety; 211; 3-2021; 1-10
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