Effects of the glyphosate-resistance gene and herbicides on soybean: Field trials monitoring biological nitrogen fixation and yield

Hungría, Mariangela; Mendes, I. C.; Nakatani, André Shigueyoshi; Reis-Junior, Fábio Bueno dos; Morais, José Zucca; Oliveira, M. C. N. de; Fernandes, Marcelo Ferreira

doi:10.1016/j.fcr.2013.12.022

Cited by 28 publications

(23 citation statements)

References 58 publications

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“…In this research, in both seasons glifosate herbicide was applied before sowing and V5 stage of soybean. It is an important information, because recent research shows that BNF and yield parameters were more affected by location, cropping season and cultivar than by the applied glifosate herbicide in the culture or weed-management strategy Hungria et al, 2014). Glifosate did not interfere in the results, therefore, Malty et al (2006) did not see any effect on nodulation in the study with doses of glifosate applied before sowing soybean.…”

Section: Resultsmentioning

confidence: 84%

Inoculation of Bradyrhizobium with cellular additives and micronutrients in soybean seeds cultivated in Oxisol under no-tillage system

Rampim¹,

Lana²,

Lima³

et al. 2015

Afr. J. Microbiol. Res.

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Section: Resultsmentioning

confidence: 84%

Inoculation of Bradyrhizobium with cellular additives and micronutrients in soybean seeds cultivated in Oxisol under no-tillage system

Rampim¹,

Lana²,

Lima³

et al. 2015

Afr. J. Microbiol. Res.

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“…However, another line (Carpenter, 2001) stated that this happened because the transgenic gene was added to genotypes that were not superior, and the decrease in yield was due to the genotype and not to the transgenic gene; thus, with the introduction of new superior cultivars containing the transgenic gene, that difference in productivity would decrease until inexistent. In addition, Hungria et al (2014) reported no yield drag on genetic modified soybean and EFSA (2010) concluded that the transgenic version is agronomically equivalent to its conventional counterpart.…”

Section: Resultsmentioning

confidence: 99%

Characterization of soybean population with sulfonylurea herbicides tolerant alleles

Mantovani¹,

Souza²,

Silva³

et al. 2017

Afr. J. Agric. Res.

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With the introduction of commercial soybean genotypes with Als1 and Als2 alleles that confer tolerance to different active ingredients of sulfonylurea group, this work aims to test soybean populations for the presence/absence of Als1 and Als2 alleles and evaluate the agronomic impact of these alleles addition. These trials were conducted in experimental stations of DuPont Pioneer at Sorriso, Mato Grosso state and Planaltina, Federal District. Four populations were evaluated with 40 genotypes each; 10 genotypes without Als1 and Als2 (null), 10 genotypes containing Als1, 10 containing Als2 and 10 genotypes containing both alleles. These populations were tested for different traits. The grain yield average at Planaltina and Sorriso were 2888 and 2456 kg ha , respectively, and they were not statistically different from each other. Also, the other traits indicated similar behavior among classes. As the studied populations were developed for this study, they were inferior than the checks. This work demonstrated that in the four studied populations, the addition of Als1 and/or Als2 alleles did not cause significant differences in the evaluated traits.

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“…The experiments were set up during the cropping seasons of 2003/2004, 2004/2005 and 2005/2006, under no-tillage management, at six sites in Brazil (States between parentheses): Passo Fundo (Rio Grande do Sul); Ponta Grossa (Paraná) (except in 2003/2004); Londrina (Paraná); Uberaba (Minas Gerais); Planaltina (Federal District); and Luiz Eduardo Magalhães (Bahia). Details about the location, climate and soil classification at each site were given elsewhere (Hungria et al, 2014), and the locations of the sites are shown in Fig. 1.…”

Section: Geographic Location General Description Of the Field Sitesmentioning

confidence: 99%

“…1. Soil chemical and physical properties were described before (Hungria et al, 2014), but are also supplied in Supplementary Table S1. Evaluation of microbial parameters started from the second year after the establishment of the field experiments.…”

Section: Geographic Location General Description Of the Field Sitesmentioning

confidence: 99%

Effects of the glyphosate-resistance gene and of herbicides applied to the soybean crop on soil microbial biomass and enzymes

Nakatani

Fernandes

Souza

et al. 2014

Field Crops Research

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Glyphosate, a broad-spectrum herbicide used for the non-selective control of weeds, inhibits 5enolpyruvylshikimate-3-phosphate synthase, a key enzyme in the synthesis of aromatic amino acids in the shikimic acid pathway in plants, fungi and bacteria, thus impairing the synthesis of proteins required for various life processes. Soybean genetically engineered to be glyphosate resistant (GR or Roundup Ready, RR) represents the most cultivated transgenic crop globally, including Brazil. There are concerns about the effects of RR transgenic soybean and of glyphosate on soil microbial communities and their functioning. Our study was designed to detect changes in soil microbial biomass-carbon (MB-C) and-nitrogen (MB-N) and in enzyme activities [beta-glucosidase (GLU) and acid phosphatase (PHO)] in a large set of field trials performed at six sites in Brazil for two cropping seasons. We evaluated the effects of the RR transgene, glyphosate and weed management (RR soybean + glyphosate vs. conventional soybean + conventional herbicides), with three pairs of nearly isogenic soybean cultivars evaluated per site. Soils were sampled from the 0-10 cm layer, between cropped lines, during the cropping seasons 2004/2005 and 2005/2006, at the R2 stage of soybean growth. Univariate and contrast analyses were performed in addition to multivariate analyses including all four microbial variables, and denominated as soil microbial variables (SMV). In general, microbial parameters and SMV were not affected by the transgene, type of herbicide or weed management. Differences were, rather, related to site, cropping season and cultivar.

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Effects of the glyphosate-resistance gene and herbicides on soybean: Field trials monitoring biological nitrogen fixation and yield

Cited by 28 publications

References 58 publications

Inoculation of Bradyrhizobium with cellular additives and micronutrients in soybean seeds cultivated in Oxisol under no-tillage system

Inoculation of Bradyrhizobium with cellular additives and micronutrients in soybean seeds cultivated in Oxisol under no-tillage system

Characterization of soybean population with sulfonylurea herbicides tolerant alleles

Effects of the glyphosate-resistance gene and of herbicides applied to the soybean crop on soil microbial biomass and enzymes

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