Behavior of RR soybeans subjected to different formulations and rates of glyphosate in the reproductive period

Albrecht, Alfredo Júnior Paiola; Albrecht, Leandro Paiola; Krenchinski, Fábio Henrique; Placido, Henrique Fabrício; Lorenzetti, Juliano Bortoluzzi; Filho, Ricardo Victória; Barroso, Arthur Arrobas Martins

doi:10.1590/s0100-83582014000400020

Cited by 8 publications

(4 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar results were found by Scursoni and Satorre (2010), Bohm et al (2014), andHungria et al (2014). However, injuries, even yield reduction, resulting from the use of high rates of glyphosate have been reported (Melhorança-Filho et al 2010;Zobiole et al 2010c;Albrecht et al 2011Albrecht et al , 2014.…”

Section: Discussionsupporting

confidence: 76%

Journal of Plant Protection Research

Silva¹,

Albrecht²,

Albrecht³

et al. 2018

View full text Add to dashboard Cite

The "second generation" of glyphosate-tolerant soybean (GT2 soybean) was developed through a different technique of insertion of the glyphosate-insensitive EPSPs gene, in comparison with "first generation" of glyphosate-tolerant soybean. However, there is not enough information available about glyphosate selectivity in GT2 soybean and the effects on the quality of seeds produced. The aim of this study was to evaluate tolerance to glyphosate and seed quality of soybean cultivar NS 6700 IPRO (GT2) with cp4-EPSPs and cry1Ac genes, after application at post-emergence (V4). The experiment was conducted in a randomized block design with four replicates and seven treatments, or rates of glyphosate (0; 720; 1,440; 2,160; 2,880; 3,600; 4,320 g of acid equivalent − a.e. • ha −1 ). Assessments were performed for crop injury, SPAD index and variables related to agronomic performance and seed quality. A complementary trial with the same cultivar and treatments in a greenhouse was conducted in a completely randomized design with four replications. Data analysis indicated no significant effect of glyphosate on V4 on agronomic performance and physiological quality of seeds, for two growing seasons. The soybean cultivar NS 6700 IPRO (GT2), with cp4-EPSPs and cry1Ac genes, was tolerant to glyphosate up to the maximum rate applied (4,320 g a.e. • ha −1 ) at post-emergence (V4). The quality of soybean seeds was not affected by glyphosate up to the maximum rate applied (4,320 g a.e. • ha −1 ) at post-emergence (V4).

show abstract

Section: Discussionsupporting

confidence: 76%

Journal of Plant Protection Research

Silva¹,

Albrecht²,

Albrecht³

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The absence of secondary roots in glyphosate-sensitive seedlings is a striking feature of this bioassay (BERVALD et al, 2010;MELO;FAGIOLI;SÁ, 2013;PÁDUA et al, 2012). According to Albrecht et al (2014), the physiological quality and the vigor of the lots fall due to the concentration of the herbicide. 26.7 20.4 * Averages followed by the same letter, uppercase in the horizontal and lowercase in the vertical, do not differ each other, at the level of 5 % probability.…”

Section: Germination Testmentioning

confidence: 98%

Seed reserve mobilization and seedling morphology in a bioassay for the detection of genetically modified soybean

Costa

Peña

Pereira

2022

Preprint

View full text Add to dashboard Cite

Germination and initial seedling development are physiological processes that determine the establishment of crops. During heterotrophic growth, each seedling develops from the biomass of its seeds. Thus, verifying the potential of genotypes to mobilize reserves under stress has been important. The aim of this study was to investigate how glyphosate affects the mobilization of reserves and seedling morphology. Two tolerant and two herbicide-sensitive cultivars were submitted to germination, seedling length and reserve mobilization tests, including treatments with glyphosate solutions (0, 0.06 and 0.12 %). The hypocotyl / radicle ratio and the efficiency of conversion of reserves to seedlings were also verified. The data were submitted to analysis of variance and test of means. It was observed that the percentage of normal seedlings and length seedlings were affected due to the concentration of the herbicide in the treatments, being the consequences more pronounced for sensitive cultivars; the glyphosate-tolerant genotype and with the best physiological quality mobilized more reserves and was more efficient in converting biomass to seedlings; in morphology, the average length of the seedlings was reduced due to the herbicide, being the roots affected in such a way that they became smaller than the hypocotyls. The herbicide affects the morphology of the seedlings mainly the radicle, and the mobilization of the reserves discriminates the genotypes regarding tolerance to glyphosate.

show abstract

“…In our two experiments, glyphosate does not affect soybean. However, there are reports indicating that a sequential spraying of glyphosate caused toxic effects on soybean, increasing the time required to ensure the closing canopy of crop (Alonso et al, 2013;Albrecht et al, 2014b;Gomes et al, 2017;Krenchiski et al, 2017). According to these authors, the toxic effects occur due to a sum of stresses caused by the herbicide in a sequential spraying as well as the effects on plant physiology.…”

Section: Glyphosate and Phosphate Fertilizationmentioning

confidence: 99%

“…Recent studies have shown that glyphosate can have phytotoxic effects on soybean by affecting process as secondary metabolism, mineral nutrition, photosynthesis and biomass accumulation (Reddy et al, 2004;Zobiole et al, 2010a;Zobiole et al, 2010b;Zobiole et al, 2011;Zobiole et al, 2012). In addition, different modes of glyphosate application, as time and sequential applications can play an important role in these deleterious effects (Albrecht et al, 2014b). Phosphate is an essential nutrient for plants, participating in crucial metabolic events, such as energy transfer and protein metabolism.…”

Section: Introductionmentioning

confidence: 99%

Glyphosate resistant soybean growth and yield affected by glyphosate and phosphate fertilization

Barroso¹,

Carvalho²

2018

Aust J Crop Sci

View full text Add to dashboard Cite

Glyphosate is the most used herbicide worldwide and glyphosate-tolerant soybean planted in almost all cultivated areas. In Brazil, the area cultivated with transgenic soybean reaches more than 90%. Recently, the application of glyphosate in tolerant soybean has assumed the possibility to injury the crop under certain conditions and herbicides formulations. Phosphate fertilization can directly influence glyphosate uptake in plants because glyphosate translocation inside cells is related with phosphate transporters. Therefore, a study was conducted in two steps intended to determine if different doses of phosphate fertilization and/or glyphosate mode of spraying could modify glyphosate susceptibility of glyphosate-tolerant soybean, affecting crop development and yield. We tested two glyphosate doses and its interaction with mode of spraying and different glyphosate doses interaction with phosphate soil-fertilization. Experiment I was set up in a two by two factorial design, testing two doses of isopropylamine salt glyphosate (960 and 1,440 g ae ha -1 ) and two modes of glyphosate application (single spraying and sequential spraying). Experiment II was set up in a two by three factorial design, testing two doses of glyphosate (960 and 1,440 g ae ha -1 ) and three doses of phosphate fertilization (54, 108 and 162 kg ha -1 of P 2 O 5 ). In both experiments, weed community was evaluated based on number of individuals and their respective dry mass accumulation. Crop was evaluated in dry mass of leaves, dry mass of stem, dry mass of pods, dry mass of shoot, plant height and grain yield. The use of glyphosate in a sequential spraying (960 + 480 g ae ha -1 ) or in higher dose (1,440 g ae ha -1 ) provides a highly efficient weed control and a high-performance crop growth and yield. The additional soil-fertilization with phosphate in this case does not affect soybean since no crop injury was observed.

show abstract

Behavior of RR soybeans subjected to different formulations and rates of glyphosate in the reproductive period

Cited by 8 publications

References 12 publications

Journal of Plant Protection Research

Journal of Plant Protection Research

Seed reserve mobilization and seedling morphology in a bioassay for the detection of genetically modified soybean

Glyphosate resistant soybean growth and yield affected by glyphosate and phosphate fertilization

Contact Info

Product

Resources

About