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Gomes MP, Le Manac'h SG, Moingt M, Smedbol E, Paquet S, Labrecque M, Lucotte M, Juneau P. Impact of phosphate on glyphosate uptake and toxicity in willow. J Hazard Mater 2016; 304:269-79. [PMID: 26561751 DOI: 10.1016/j.jhazmat.2015.10.043] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [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: 05/14/2015] [Revised: 09/15/2015] [Accepted: 10/20/2015] [Indexed: 05/17/2023]
Abstract
Phosphate (PO4(3-)) has been shown to increase glyphosate uptake by willow, a plant species known for its phytoremediation potential. However, it remains unclear if this stimulation of glyphosate uptake can result in an elevated glyphosate toxicity to plants (which could prevent the use of willows in glyphosate-remediation programs). Consequently, we studied the effects of PO4(3-) on glyphosate uptake and toxicity in a fast growing willow cultivar (Salix miyabeana SX64). Plants were grown in hydroponic solution with a combination of glyphosate (0, 0.001, 0.065 and 1 mg l(-1)) and PO4(3-) (0, 200 and 400 mg l(-1)). We demonstrated that PO4(3-) fertilization greatly increased glyphosate uptake by roots and its translocation to leaves, which resulted in increased shikimate concentration in leaves. In addition to its deleterious effects in photosynthesis, glyphosate induced oxidative stress through hydrogen peroxide accumulation. Although it has increased glyphosate accumulation, PO4(3-) fertilization attenuated the herbicide's deleterious effects by increasing the activity of antioxidant systems and alleviating glyphosate-induced oxidative stress. Our results indicate that in addition to the glyphosate uptake, PO4(3-) is involved in glyphosate toxicity in willow by preventing glyphosate induced oxidative stress.
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Affiliation(s)
- Marcelo Pedrosa Gomes
- Université du Québec à Montréal, Department of Biological Sciences, TOXEN, Ecotoxicology of Aquatic Microorganisms Laboratory, Succ. Centre-Ville, H3C 3P8 Montréal, Québec, Canada; Université du Québec à Montréal, Institut des Sciences de l'Environnement, Succ. Centre-Ville, C.P. 8888, H3C 3P8 Montréal, Québec, Canada
| | - Sarah Gingras Le Manac'h
- Université du Québec à Montréal, Department of Biological Sciences, TOXEN, Ecotoxicology of Aquatic Microorganisms Laboratory, Succ. Centre-Ville, H3C 3P8 Montréal, Québec, Canada
| | - Matthieu Moingt
- Université du Québec à Montréal, Institut des Sciences de l'Environnement, Succ. Centre-Ville, C.P. 8888, H3C 3P8 Montréal, Québec, Canada
| | - Elise Smedbol
- Université du Québec à Montréal, Institut des Sciences de l'Environnement, Succ. Centre-Ville, C.P. 8888, H3C 3P8 Montréal, Québec, Canada
| | - Serge Paquet
- Université du Québec à Montréal, Institut des Sciences de l'Environnement, Succ. Centre-Ville, C.P. 8888, H3C 3P8 Montréal, Québec, Canada
| | - Michel Labrecque
- Institut de Recherche en Biologie Végétale, Montreal Botanical Garden, 4101 Sherbrooke East, H1X 2B2, Montréal, Québec, Canada
| | - Marc Lucotte
- Université du Québec à Montréal, Institut des Sciences de l'Environnement, Succ. Centre-Ville, C.P. 8888, H3C 3P8 Montréal, Québec, Canada
| | - Philippe Juneau
- Université du Québec à Montréal, Department of Biological Sciences, TOXEN, Ecotoxicology of Aquatic Microorganisms Laboratory, Succ. Centre-Ville, H3C 3P8 Montréal, Québec, Canada; Université du Québec à Montréal, Institut des Sciences de l'Environnement, Succ. Centre-Ville, C.P. 8888, H3C 3P8 Montréal, Québec, Canada.
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Otieno NE, Dai X, Barba DD, Bahman A, Smedbol E, Rajeb M, Jaton L. Palm Oil Production in Malaysia: An Analytical Systems Model for Balancing Economic Prosperity, Forest Conservation and Social Welfare. ACTA ACUST UNITED AC 2016. [DOI: 10.4236/as.2016.72006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Gomes MP, Smedbol E, Chalifour A, Hénault-Ethier L, Labrecque M, Lepage L, Lucotte M, Juneau P. Alteration of plant physiology by glyphosate and its by-product aminomethylphosphonic acid: an overview. J Exp Bot 2014; 65:4691-703. [PMID: 25039071 DOI: 10.1093/jxb/eru269] [Citation(s) in RCA: 146] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
It is generally claimed that glyphosate kills undesired plants by affecting the 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) enzyme, disturbing the shikimate pathway. However, the mechanisms leading to plant death may also be related to secondary or indirect effects of glyphosate on plant physiology. Moreover, some plants can metabolize glyphosate to aminomethylphosphonic acid (AMPA) or be exposed to AMPA from different environmental matrices. AMPA is a recognized phytotoxin, and its co-occurrence with glyphosate could modify the effects of glyphosate on plant physiology. The present review provides an overall picture of alterations of plant physiology caused by environmental exposure to glyphosate and its metabolite AMPA, and summarizes their effects on several physiological processes. It particularly focuses on photosynthesis, from photochemical events to C assimilation and translocation, as well as oxidative stress. The effects of glyphosate and AMPA on several plant physiological processes have been linked, with the aim of better understanding their phytotoxicity and glyphosate herbicidal effects.
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Affiliation(s)
- Marcelo P Gomes
- Université du Québec à Montréal, Département des sciences biologiques, Centre de recherche interinstitutionnel en toxicologie de l'environnement (TOXEN), Ecotoxicology of Aquatic Microorganisms Laboratory, Succ. Centre-Ville, H3C 3P8, Montréal, Québec, Canada Université du Québec à Montréal, Institut des Sciences de l'environnement, Succ. Centre-Ville, C.p. 8888, H3C 3P8, Montréal, Québec, Canada
| | - Elise Smedbol
- Université du Québec à Montréal, Département des sciences biologiques, Centre de recherche interinstitutionnel en toxicologie de l'environnement (TOXEN), Ecotoxicology of Aquatic Microorganisms Laboratory, Succ. Centre-Ville, H3C 3P8, Montréal, Québec, Canada Université du Québec à Montréal, Institut des Sciences de l'environnement, Succ. Centre-Ville, C.p. 8888, H3C 3P8, Montréal, Québec, Canada
| | - Annie Chalifour
- Université du Québec à Montréal, Département des sciences biologiques, Centre de recherche interinstitutionnel en toxicologie de l'environnement (TOXEN), Ecotoxicology of Aquatic Microorganisms Laboratory, Succ. Centre-Ville, H3C 3P8, Montréal, Québec, Canada
| | - Louise Hénault-Ethier
- Université du Québec à Montréal, Institut des Sciences de l'environnement, Succ. Centre-Ville, C.p. 8888, H3C 3P8, Montréal, Québec, Canada
| | - Michel Labrecque
- Université de Montréal, Institut de Recherche en Biologie Végétale, 4101 Sherbrooke East, H1X 2B2, Montréal, Québec, Canada
| | - Laurent Lepage
- Université du Québec à Montréal, Institut des Sciences de l'environnement, Succ. Centre-Ville, C.p. 8888, H3C 3P8, Montréal, Québec, Canada
| | - Marc Lucotte
- Université du Québec à Montréal, Institut des Sciences de l'environnement, Succ. Centre-Ville, C.p. 8888, H3C 3P8, Montréal, Québec, Canada
| | - Philippe Juneau
- Université du Québec à Montréal, Département des sciences biologiques, Centre de recherche interinstitutionnel en toxicologie de l'environnement (TOXEN), Ecotoxicology of Aquatic Microorganisms Laboratory, Succ. Centre-Ville, H3C 3P8, Montréal, Québec, Canada Université du Québec à Montréal, Institut des Sciences de l'environnement, Succ. Centre-Ville, C.p. 8888, H3C 3P8, Montréal, Québec, Canada
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