Occurrence and Persistence of the Herbicide Glyphosate in a suburban tropical watershed

<p>Teratogenic effect of herbicide glyphosate-Roundup, sold under the name Glifotox on Wistar rats was evaluated. The biological material was treated intraperitoneally with glyphosate at concentrations of 100, 125, and 150 mg/kg from gestation day nine. Hysterectomy was performed on day 18 of gestation, and the uterine horns where the embryos were located, in addition to recording the percentage of malformed embryos by modifying the method of Wilson were observed. The liver was removed and quantified by spectrophotometry with transaminase activity showed higher concentrations malformation rate and higher enzyme activity was 125 mg/kg, below is the average of 100 mg/kg and higher concentrations such as 150 mg/kg a large number of resorptions was obtained. It is concluded that glyphosate is toxic affecting the liver and liver enzymes involved in the formation of amino acids also produce delay in embryonic development.</p>

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Effects of Glyphosate-Based and Derived Products on Sea Urchin Larval Development

Journal of Marine Science and Engineering ◽

10.3390/jmse8090661 ◽

2020 ◽

Vol 8 (9) ◽

pp. 661

Author(s):

Davide Asnicar ◽

Costanza Cappelli ◽

Ahmad Safuan Sallehuddin ◽

Nur Atiqah Maznan ◽

Maria Gabriella Marin

Keyword(s):

Larval Development ◽

Sea Urchin ◽

Marine Invertebrates ◽

Parent Compound ◽

Paracentrotus Lividus ◽

Marine Species ◽

Negative Effects ◽

Aminomethylphosphonic Acid ◽

Main Degradation Product ◽

Herbicide Glyphosate

Despite the widespread use of herbicide glyphosate in cultivation, its extensive runoff into rivers and to coastal areas, and the persistence of this chemical and its main degradation product (aminomethylphosphonic acid, AMPA) in the environment, there is still little information on the potential negative effects of glyphosate, its commercial formulation Roundup® and AMPA on marine species. This study was conducted with the aim of providing a comparative evaluation of the effects of glyphosate-based and its derived chemicals on the larval development of the sea urchin Paracentrotus lividus, thus providing new data to describe the potential ecotoxicity of these contaminants. In particular, the effects on larval development, growth and metabolism were assessed during 48 h of exposure from the time of egg fertilization. The results confirm that AMPA and its parent compound, glyphosate have similar toxicity, as observed in other marine invertebrates. However, interestingly, the Roundup® formulation seemed to be less toxic than the glyphosate alone.

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Initial abstraction ratio and Curve Number estimation using rainfall and runoff data from a tropical watershed

RBRH ◽

10.1590/2318-0331.241920170199 ◽

2019 ◽

Vol 24 ◽

Cited By ~ 2

Author(s):

Luiz Claudio Galvão do Valle Junior ◽

Dulce Buchala Bicca Rodrigues ◽

Paulo Tarso Sanches de Oliveira

Keyword(s):

Conversion Factor ◽

Poor Performance ◽

Curve Number ◽

Storm Events ◽

Rainfall Runoff ◽

Initial Abstraction ◽

Rainfall Depth ◽

Standard Value ◽

Tropical Watershed ◽

Runoff Events

ABSTRACT The Curve Number (CN) method is extensively used for predict surface runoff from storm events. However, remain some uncertainties in the method, such as in the use of an initial abstraction (λ) standard value of 0.2 and on the choice of the most suitable CN values. Here, we compute λ and CN values using rainfall and runoff data to a rural basin located in Midwestern Brazil. We used 30 observed rainfall-runoff events with rainfall depth greater than 25 mm to derive associated CN values using five statistical methods. We noted λ values ranging from 0.005 to 0.455, with a median of 0.045, suggesting the use of λ = 0.05 instead of 0.2. We found a S0.2 to S0.05 conversion factor of 2.865. We also found negative values of Nash-Sutcliffe Efficiency (to the estimated and observed runoff). Therefore, our findings indicated that the CN method was not suitable to estimate runoff in the studied basin. This poor performance suggests that the runoff mechanisms in the studied area are dominated by subsurface stormflow.

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Effective removal of the herbicide glyphosate by the kelp Saccharina japonica female gametophytes from saline waters and its mechanism elucidation

Chemosphere ◽

10.1016/j.chemosphere.2021.129826 ◽

2021 ◽

Vol 274 ◽

pp. 129826

Author(s):

Xianming Tang ◽

Linsong Shen ◽

Shangshu Liu ◽

Jiangtao Gao

Keyword(s):

Saccharina Japonica ◽

Effective Removal ◽

Saline Waters ◽

Herbicide Glyphosate

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Hydrologic effect of groundwater development in a small mountainous tropical watershed

Journal of Hydrology ◽

10.1016/j.jhydrol.2012.01.023 ◽

2012 ◽

Vol 428-429 ◽

pp. 51-67 ◽

Cited By ~ 6

Author(s):

Mohammad Safeeq ◽

Ali Fares

Keyword(s):

Groundwater Development ◽

Tropical Watershed

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The herbicide glyphosate is a potent inhibitor of 5-enolpyruvylshikimic acid-3-phosphate synthase

Biochemical and Biophysical Research Communications ◽

10.1016/0006-291x(80)90547-1 ◽

1980 ◽

Vol 94 (4) ◽

pp. 1207-1212 ◽

Cited By ~ 622

Author(s):

H.C. Steinrücken ◽

N. Amrhein

Keyword(s):

Potent Inhibitor ◽

Herbicide Glyphosate ◽

Phosphate Synthase

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Lignification of the plant and seed quality of RR soybeans sprayed with herbicide glyphosate

Revista CERES ◽

10.1590/s0034-737x2013000200019 ◽

2013 ◽

Vol 60 (2) ◽

pp. 286-292

Author(s):

Cristiane Fortes Gris ◽

Edila Vilela de Resende Von Pinho ◽

Maria Laene de Moreira Carvalho ◽

Rafael Parreira Diniz ◽

Thaís de Andrade

Keyword(s):

Seed Quality ◽

Lignin Content ◽

Block Design ◽

Accelerated Aging ◽

Soybean Seeds ◽

Randomized Block Design ◽

Physiological Quality ◽

Hand Weeding ◽

Herbicide Glyphosate

Differences in levels of lignin in the plant between conventional and transgenic cultivars RR has been reported by several authors, however, there are few studies evaluating the influence of spraying of glyphosate on the lignin in the plant and RR soybean seeds. The aim of this study was to evaluate the physiological quality of RR transgenic soybean seeds and the lignin contents of plants sprayed with the herbicide glyphosate. The assays were conducted both in greenhouse and field in the municipality of Lavras, MG, in the agricultural year 2007/08. The experiment was arranged in a splitplot design with four replicates, considering the treatments hand weeding and herbicide glyphosate as plots, and five RR soybean cultivars (BRS 245 RR, BRS 247 RR, Valiosa RR, Silvânia RR and Baliza RR) as splitplots. In the greenhouse, the cultivars tested were BRS 245 RR and Valiosa RR in a randomized block design with four replicates. The sprayings were carried out at stages V3, V7 and early R5 (3L/ha). The 1000 seed weight, mechanical injury, germination and germination velocity index, emergence velocity index, accelerated aging, electrical conductivity and water soaking seed test, lignin content in the seed coat, in the stem and legumes were determined. The spraying of glyphosate herbicide, in greenhouse and field, did not alter the physiological quality of seeds and the lignin contents in the plant.

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