Glyphosate Resistance Technology Has Minimal or No Effect on Maize Mineral Content and Yield

Reddy, Krishna N.; Cizdziel, James V.; Williams, Martin M.; Maul, Jude E.; Rimando, Agnes M.; Duke, Stephen O.

doi:10.1021/acs.jafc.8b01655

Cited by 18 publications

(17 citation statements)

References 40 publications

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“…Intensive use of glyphosate has been associated with increased resistance in plants, while glyphosate residues are routinely detected along the food production chain and in the environment. The herbicide has been detected in soybeans [9–14], maize [15, 16], canola [17], and poultry and cattle feed [18], as well as in urine samples of humans and cows [19–21]. Data regarding the amount of residues vary depending on the time of harvest, particular pesticide regulations in different countries, and the applied formulation.…”

Section: Introductionmentioning

confidence: 99%

Effect of a glyphosate-containing herbicide on Escherichia coli and Salmonella ser. Typhimurium in an in vitro rumen simulation system

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Riede

et al. 2019

EuJMI

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Glyphosate (N-(phosphonomethyl)glycine) is the most-used herbicide worldwide. Many studies in the past have shown that residues of the herbicide can be found in many cultivated plants, including those used as livestock feed. Sensitivity to glyphosate varies with bacteria, particularly those residing in the intestine, where microbiota is exposed to glyphosate residues. Therefore, less susceptible pathogenic isolates could have a distinct advantage compared to more sensitive commensal isolates, probably leading to dysbiosis.To determine whether the ruminal growth and survival of pathogenic Escherichia coli or Salmonella serovar Typhimurium are higher when glyphosate residues are present in the feed, an in vitro fermentation trial with a “Rumen Simulation System” (RUSITEC) and a glyphosate-containing commercial formulation was performed.Colony forming units of E. coli and Salmonella ser. Typhimurium decreased steadily in all fermenters, regardless of the herbicide application. Minimum inhibitory concentrations of the studied Salmonella and E. coli strains did not change, and antibiotic susceptibility varied only slightly but independent of the glyphosate application.Overall, application of the glyphosate-containing formulation in a worst-case concentration of 10 mg/L neither increased the abundance for the tested E. coli and Salmonella strain in the in vitro fermentation system, nor promoted resistance to glyphosate or antibiotics.

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Section: Introductionmentioning

confidence: 99%

Effect of a glyphosate-containing herbicide on Escherichia coli and Salmonella ser. Typhimurium in an in vitro rumen simulation system

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Riede

et al. 2019

EuJMI

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“…Although qualification of the traces of Gly in cane fiber, cane roots, as well as cane shoot was not involved in this study, studies on the persistence of Gly in crops revealed that the accumulation of Gly in these parts of a crop was below the limit of detection [40][41][42]. More interestingly, application of GLy on sugar beet only found trace amounts of glyphosate residue in its shoots and roots during two weeks' treatment [43]. As shown in Table 3, all cane juice from the Gly-sprayed experiments had its residue in a range of 1.05 to 1.06, which is under the limit as per the regulations of the Ministry of Health (Gly ≤ 2 µg/mL).…”

Section: Evaluation Of Ga3 and Gly Residues In Sugarcanementioning

confidence: 80%

Effect of GA3 and Gly Plant Growth Regulators on Productivity and Sugar Content of Sugarcane

Nguyen¹,

Dang²,

Nguyen³

et al. 2019

Agriculture

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The use of plant growth regulators is one effective solution to improve sugarcane yields and sugar content in several countries. In this study, we examined the role of gibberellin acid (GA3) and glyphosate (Gly) plant growth regulators to determine the appropriate concentration of GA3 and Gly to increase the yield of sugarcane and sugar accumulation, respectively. The statistical results showed that GA3 was sprayed at 150 ppm to increment the actual yield by 19.94%; sucrose accumulation increased by 2.21%. With Gly treatment, although the yield decreased by 3.17%, sucrose accumulation increased by 11.27% compared to control trials. In this study, the combined concentration of 150 ppm of both GA3 and Gly gave the best results, for which sucrose accumulation increased from 2.21% to 10.74% and from 19.94% to 20.97% for actual yield. The results led to increased net income compared to the control. To address concerns about residues of plant growth regulators, residues of GA3 and Gly were evaluated after the sugarcane harvest using the HPLC and UV-vis methods, respectively. The analyzed results showed that their residues were lower than what is permitted in several countries. This showed the applicability of the study, on a large scale, to increase sucrose accumulation, productivity of sugarcane, and profit for farmers.

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“…We also found no reductions in yield by glyphosate application on GR corn or GR soybean in fields with a long history of glyphosate use or with no history of glyphosate use [50, 51]. In a similar study with GR sweet corn, there was even a slight increase in yield associated with glyphosate application [52], which could have been due to hormesis, a phenomenon with non-phytotoxic doses of glyphosate [53].…”

Section: Discussionmentioning

confidence: 98%

Soil microbial communities in diverse agroecosystems exposed to glyphosate

Kepler

Schmidt

Yarwood

et al. 2018

Preprint

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24In spite of glyphosate's wide use in agriculture, questions remain about effects of the herbicide 25 on soil microbial communities. Conflicting scientific literature reports divergent results; from no 26 observable effect of glyphosate to the enrichment of common agricultural pathogens such as 27Fusarium. We conducted a comprehensive field-based study to compare treatments that did 28 and did not receive foliar application of glyphosate spray. The study included two field sites, 29Maryland and Mississippi; two crops, soybean and corn; four site years, 2013 and 2014; and a 30 variety of organic and conventional farming systems. Using amplicon sequencing, the 31 prokaryotic (16S rRNA) and fungal (ITS) communities were described along with chemical and 32 physical properties of the soil. Sections of corn and soy roots were plated to screen for the 33 presence of plant pathogens. Geography, farming system, and seasonal progression were 34 significant factors determining composition of fungal and bacterial communities. Plots treated 35 with or without glyphosate did not differ in overall microbial community composition after 36 controlling for these factors. No differential effect of glyphosate treatment was found in the 37 relative abundance of organisms such as Fusarium spp. or putative growth-promoting bacteria 38

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Glyphosate Resistance Technology Has Minimal or No Effect on Maize Mineral Content and Yield

Cited by 18 publications

References 40 publications

Effect of a glyphosate-containing herbicide on Escherichia coli and Salmonella ser. Typhimurium in an in vitro rumen simulation system

Effect of a glyphosate-containing herbicide on Escherichia coli and Salmonella ser. Typhimurium in an in vitro rumen simulation system

Effect of GA3 and Gly Plant Growth Regulators on Productivity and Sugar Content of Sugarcane

Soil microbial communities in diverse agroecosystems exposed to glyphosate

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