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Effect of glyphosate on symbiotic N 2 fixation and nickel concentration in glyphosate-resistant soybeans

Effect of glyphosate on symbiotic N 2 fixation and nickel concentration in glyphosate-resistant soybeans,10.1016/j.apsoil.2009.12.003,Applied Soil Eco

Effect of glyphosate on symbiotic N 2 fixation and nickel concentration in glyphosate-resistant soybeans   (Citations: 3)
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Decreased biological nitrogen fixation in glyphosate-resistant (GR) soybeans has been attributed directly to toxicity of glyphosate or its metabolites, to N2-fixing microorganisms. As a strong metal chelator, glyphosate could influence symbiotic N2 fixation by lowering the concentration of nickel (Ni) that is essential for the symbiotic microorganisms. Evaluation of different cultivars grown on different soil types at the State University of Maringá, PR, Brazil during the summer 2008 revealed, significant decreases in photosynthetic parameters (chlorophyll, photosynthetic rate, transpiration and stomatal conductance) and nickel content with glyphosate use (single or sequential application). This work demonstrated that glyphosate can influence the symbiotic N2 fixation by lowering nickel content available to the symbiotic microorganisms.
Journal: Applied Soil Ecology - APPL SOIL ECOL , vol. 44, no. 2, pp. 176-180, 2010
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