Nutrient accumulation and photosynthesis in glyphosate-resistant soybeans is reduced under glyphosate use

Journal or Publishing Institution: Journal of Plant Nutrition

Study: http://www.tandfonline.com/doi/abs/10.1080/01904167.2010.491890#preview

Author(s): Zobiole, L.H.S., Junior, R.S.D.O., Kremer, R.J., Muniz, A.S. and Junior, A.D.O.

Article Type: Peer Reviewed Study

Record ID: 1763

Abstract: Global production of glyphosate-resistant (GR) soybean [Glycine max (L.) Merr.] continues to increase annually; however, there are no particular specific fertilizer recommendations for the transgenic varieties used in this system largely because reports of glyphosate effects on mineral nutrition of GR soybeans are lacking. Several metabolites or degradation products of glyphosate have been identified or postulated to cause undesirable effects on GR soybeans. In this work we used increasing glyphosate rates in different application on cv. ‘BRS 242 GR’ in order to evaluate photosynthetic parameters, macro- and micronutrient uptake and accumulation and shoot and root dry biomass production. Increasing glyphosate rates revealed a significant decrease in photosynthesis, macro and micronutrients accumulation in leaf tissues and also decreases in nutrient uptake. The reduced biomass in GR soybeans represents additive effects from the decreased photosynthetic parameters as well as lower availability of nutrients in tissues of the glyphosate treated plants.

Keywords: Nutrient, Photosynthesis, Glyphosate, Glyphosate-Resistant Soybean; Plant Growth, Plant Nutrition, Transgenic Plants, Application Rate, Dry Matter Accumulation, Genetic Variation, Roots, Glycine Max, Soybeans, Net Assimilation Rate, Leaves, Herbicide Resistance, Quantitative Analysis, Nutrient Uptake, Shoots; Glycine (Fabaceae), Glycine Max, Plants; Biomass, Biomass Production, Degradation, Effects, Fertilizers, Genetic Transformation, Glyphosate, Guidelines, Herbicides, Metabolites, Mineral Nutrition, Nutrient Uptake, Nutrients, Pesticide Resistance, Pesticides, Photosynthesis, Plant Nutrition, Production, Soyabeans, Trace Elements, Transgenics, Uptake, Varieties, Weed Control, Weeds; Carbon Assimilation, Carbon Dioxide Fixation, Fertilisers, Microelements, Recommendations, Soybeans, Weedicides, Weedkillers, Brazil

Citation: Zobiole, L.H.S., Junior, R.S.D.O., Kremer, R.J., Muniz, A.S. and Junior, A.D.O., 2010. Nutrient accumulation and photosynthesis in glyphosate-resistant soybeans is reduced under glyphosate use. Journal of Plant Nutrition, 33(12), pp.1860-1873.