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Pascual M, Salcedo MF, Sanchez LM, Mansilla AY, Alvarez VA, Casalongué C, Tomadoni B. Development and Characterization of Biobased Superabsorbent Materials for Agricultural Applications: Study in Lettuce (Lactuca sativa L.) under Drought Stress. Polym Sci Ser A 2022. [DOI: 10.1134/s0965545x22700456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
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Salcedo MF, Mansilla AY, Colman SL, Iglesias MJ, Alvarez VA, Casalongué CA. Efficacy of an organically modified bentonite to adsorb 2,4-dichlorophenoxyacetic acid (2,4-D) and prevent its phytotoxicity. J Environ Manage 2021; 297:113427. [PMID: 34346399 DOI: 10.1016/j.jenvman.2021.113427] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 07/25/2021] [Accepted: 07/27/2021] [Indexed: 06/13/2023]
Abstract
The herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) is widely used due to it selective action, and preferential control of dicotyledonous weeds affecting cereal crops. Physiological responses of sensitive dicotyledonous plants to 2,4-D include growth retardation, senescence, and cell death. Due to soil and water contamination by agricultural practices, 2,4-D constitutes a potential risk to non-target plant species. In this work, the potential advantage of using organic modified bentonite (Bent) to adsorb 2,4-D and therefore mitigate damage produced by this herbicide on sensitive not-target vegetable species was investigated. Dodecylamine (DDA) was used as an organic modifier to change the hydrophilic nature of Bent into an organophilic matrix. The adsorption performances of 2,4-D by Bent-DDA were analyzed. The maximum adsorptions of 2,4-D (22.1 mg/L) from aqueous solution containing 1.0 or 2.5 mg/mL Bent-DDA were 40 and 80 %, respectively. The physical interaction of Bent-DDA with 2,4-D was characterized by Wide Angle X-ray Scattering (WAXS) and thermogravimetric analysis (TGA). The biological functionality of Bent-DDA matrix as 2,4-D adsorbent was tested in a bioassay in the Arabidopsis thaliana plant model system. The primary root growth of Arabidopsis seedlings is strongly inhibited by low concentrations of 2,4-D. Arabidopsis seedlings submitted to Bent-DDA pre-treated herbicide aqueous solution showed similar root growth than 2,4-D non-treated seedlings. Finally, the ability of Bent-DDA to prevent 2,4-D phytotoxicity was exploratory investigated in lettuce plants. Lettuce plants pre-treated with 20 μg/mL Bent-DDA showed reduced sensitivity to 2,4-D including an increment on chlorophyll content and biomass compared with non-treated plants. Our findings revealed a promising scenario for the application of Bent-DDA as an effective adsorbent of 2,4-D at productive scale.
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Affiliation(s)
- M F Salcedo
- Instituto de Investigaciones Biológicas (IIB). UE CONICET-UNMDP, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata (UNMDP) y Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Deán Funes, 3250, (7600), Mar del Plata, Argentina
| | - A Y Mansilla
- Instituto de Investigaciones Biológicas (IIB). UE CONICET-UNMDP, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata (UNMDP) y Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Deán Funes, 3250, (7600), Mar del Plata, Argentina.
| | - S L Colman
- Instituto de Investigaciones Biológicas (IIB). UE CONICET-UNMDP, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata (UNMDP) y Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Deán Funes, 3250, (7600), Mar del Plata, Argentina
| | - M J Iglesias
- Instituto de Investigaciones Biológicas (IIB). UE CONICET-UNMDP, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata (UNMDP) y Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Deán Funes, 3250, (7600), Mar del Plata, Argentina; Laboratorio de Fisiología y Biología Molecular, Departamento de Fisiología, Biología Molecular y Celular, IFIBYNE-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, Argentina
| | - V A Alvarez
- Grupo de Materiales Compuestos Termoplásticos (CoMP), Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA). UE CONICET-UNMDP, Facultad de Ingeniería, Universidad Nacional de Mar del Plata (UNMDP) y Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Colón, 10850, (7600), Mar del Plata, Argentina
| | - C A Casalongué
- Instituto de Investigaciones Biológicas (IIB). UE CONICET-UNMDP, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata (UNMDP) y Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Deán Funes, 3250, (7600), Mar del Plata, Argentina
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Mansilla AY, Albertengo L, Rodríguez MS, Debbaudt A, Zúñiga A, Casalongué CA. Evidence on antimicrobial properties and mode of action of a chitosan obtained from crustacean exoskeletons on Pseudomonas syringae pv. tomato DC3000. Appl Microbiol Biotechnol 2013; 97:6957-66. [DOI: 10.1007/s00253-013-4993-8] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Revised: 05/07/2013] [Accepted: 05/10/2013] [Indexed: 10/26/2022]
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