Use of exogenous amino acid to prevent glyphosate injury in glyphosate-resistant soybean

Planta Daninha

Constantin, J.¹  University of Missouri, Columbia, USA¹  Biffe, D.F.¹  Kremer, R.J.¹  UEM¹  Oliveira Jr., R.S.¹  Zobiole, L.H.S.¹ 

关键词: photosynthesis;    biomass;    nodulation;    herbicide;    Rhizobium.;   

DOI  :  10.1590/S0100-83582010000300022

学科分类：农业科学（综合）

来源: Sociedade Brasileira da Ciencia das Plantas Daninhas (S B C P D) / Brazilian Society of Herb Science

【 摘 要 】

Cultivation of glyphosate-resistant (GR) soybeans has increased in Brazil as a result of the application of this technology in weed management systems developed for this crop. However, the expansion of GR soybean production has significantly increased the use of glyphosate and, in some cases, resulted in injury symptoms observed in GR soybean, known as "yellow flashing" or yellowing of the upper leaves. Thus, two experiments were conducted in different years. The first experiment aimed to evaluate the influence of glyphosate on GR soybeans regarding the photosynthetic variables, nodule parameters, and shoot and root dry biomass by comparing cultivar BRS  242  GR without glyphosate and BRS 242 RR + glyphosate at 1.200  g  ha-1 at V4 growth stage, to the near isogenic non-GR parental line cv. Embrapa 58. The second experiment aimed to reassess the same parameters in GR soybeans at the V4 stage treated with glyphosate, plus the application of various amino acids, to evaluate the expected recovery of soybean growth under the exogenous use of supplemental amino acids. In general, the photosynthetic variables, nodulation parameters and shoot and root dry biomass were affected by glyphosate; however, the use of amino acids may be a strategy to prevent the undesirable effects of this herbicide on GR soybean

【 授权许可】

Unknown