Differential effects of glyphosate and aminomethylphosphonic acid (AMPA) on photosynthesis and chlorophyll metabolism in willow plants

Gomes, Marcelo Pedrosa; Manac’h, Sarah Gingras Le; Maccario, Sophie; Labrecque, Michel; Lucotte, Marc; Juneau, Philippe

doi:10.1016/j.pestbp.2015.11.010

Cited by 140 publications

(81 citation statements)

References 51 publications

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“…photosynthetic rate, as observed in our study, has also been reported in the literature on plant species exposed to glyphosate (Ding et al, 2011;Yanniccari et al, 2012;Agostinetto et al, 2016;Gomes et al, 2016;Radwan and Fayez, 2016). Means ± standard error of the mean followed by the same uppercase letters in the columns and lowercase letters in the rows do not differ significantly from each other by the Tukey's test (p≤0.05).…”

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confidence: 90%

Differential Tolerance of Clones of Eucalyptus grandis Exposed to Drift of the Herbicides Carfentrazone-Ethyl and Glyphosate

Santos

Alfenas

et al. 2019

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Drift of the herbicides carfentrazone-ethyl and glyphosate may affect the initial growth of eucalyptus. This study aimed to assess the effect of carfentrazone-ethyl and glyphosate drift on photosynthesis, leaf morphoanatomy, and initial growth of two clones of Eucalyptus grandis. Two experiments were carried out in a 2 x 4 factorial scheme, in which factor 1 was represented by two clones of E. grandis and factor 2 by four herbicide underdoses (control, 86.4 g a.e. ha-1 of glyphosate, 3.0 g a.e. ha-1 of carfentrazone-ethyl, and the mixture of 86.4 g a.e. ha-1 of glyphosate + 3.0 g a.e. ha-1 of carfentrazone-ethyl). Herbicide application was carried out by simulating the drift in the lower third of seedling canopy. Assessments were performed 23 days after herbicide application. Both clones presented morphoanatomical changes such as erosion of epicuticular waxes and degeneration of epidermal and parenchymal cells, especially when exposed to carfentrazone-ethyl underdose or its mixture with glyphosate. The clone CLR 383 was the most affected by the tested herbicides and presented the highest injury, lowest initial growth, lowest dry matter, and highest reduction of photosynthetic rate when treated with herbicide mixture, followed by carfentrazone-ethyl and glyphosate underdoses. The initial growth, dry matter, and photosynthesis of the clone CLR 384 were not affected by the carfentrazone-ethyl underdose. Thus, both herbicides applied in isolation or in a mixture reduced the initial growth, dry matter, and photosynthesis of eucalyptus.

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confidence: 90%

Differential Tolerance of Clones of Eucalyptus grandis Exposed to Drift of the Herbicides Carfentrazone-Ethyl and Glyphosate

Santos

Alfenas

et al. 2019

Planta daninha

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“…Furthermore, referring to Sandalio et al (2001) the decrease in Chl contents in stressed leaves was attributed to the inhibition of chlorophyll biosynthesis or increased chlorophyll degradation. According to Gomes et al (2015) the decrease in chlorophyll content could also be related to the increase in ROS as they can induce PSII and chlorophyll alteration. The decrease in chlorophyll is one of the most commonly observed consequences of HMs stress and can partly explain the decrease of stomatal conductance.…”

Section: Discussionmentioning

confidence: 99%

Effects of sewage sludge on bio-accumulation of heavy metals in tomato seedlings

et al. 2017

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The proposal to use sewage sludge (SS) on agricultural fields as a sustainable way to dispose of the waste is based on its high organic and nutrients content. However, the presence of heavy metals (HMs) in sludge can contaminate crops and accumulate in the food chain. The aim of this study was to assess changes in soil fertility, biochemical responses of tomato (Solanum lycopersicum L. cv. Rio Grande) seedlings and the availability of HMs with increased rate application of SS (0, 2.5, 5 and 7.5%). Leaf chlorophyll content, nutritional status, proline, membrane peroxidation, stomatal conductance and HM accumulation were investigated. Results showed that the soil pH decreased, whereas soil salinity, organic carbon, total N, available P and exchangeable Na, Ca, K and HM content increased significantly with increasing application rates of SS. Among the three HMs (Zn, Cu and Cr), Zn had the highest capacity for transferring from soil into plants. Low metal translocation was observed from roots to leaves. The 7.5% SS dose decreased biomass production and caused a decline in chlorophyll content and stomatal conductance. However, lipid peroxidation and proline contents increased. Therefore, the use of 2.5 and 5% doses of sewage sludge in agriculture would be an efficient and costeffective method to restore the fertility of soil and an environment-friendly solution for disposal problems.Additional key words: sewage sludge amendment; soil fertility; biochemical responses; Solanum lycopersicum.

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“…Both GP and its degradation product (aminomethylphosponic acid – AMPA) inhibit antioxidant enzyme activities and cause reactive oxygen species (ROS) accumulation. As a result, the plant cell physiology breaks down and leads to cell death . Plants treated with this herbicide cannot produce secondary aromatic metabolites, such as phytoalexins, which have antimicrobial properties and can defend the plant from several pathogens.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, the plant cell physiology breaks down and leads to cell death. 7 Plants treated with this herbicide cannot produce secondary aromatic metabolites, such as phytoalexins, which have antimicrobial properties and can defend the plant from several pathogens. Glyphosate-treated plants therefore generally die due to an infection by pathogens present in soil, which colonize the plant root.…”

Section: Introductionmentioning

confidence: 99%

Effect of in vitro glyphosate on Fusarium spp. growth and disease severity in maize

et al. 2019

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BACKGROUND Glyphosate (GP) is one of the main pesticides used for maize production. Fusarium sp. is a fungal genus with several phytopathogenic species and toxigenic features. In this study, the culturable soil mycota was evaluated using the surface‐spray method. The effect of GP on the growth parameters (growth rate and lag phase) of Fusarium spp. was also tested on solid media conditioned with different water activities. Finally, the GP effect on disease severity caused by Fusarium sp. in maize seedlings was studied. RESULTS The results showed that Fusarium species are frequently isolated from GP‐exposed soils. The GP concentrations tested had a significant effect on F. graminearum, F. verticillioides and F. oxysporum growth parameters on solid media. The pathogenicity tests showed that the disease severity of the maize seedlings significantly increased with increasing GP concentrations. CONCLUSIONS This study showed that Fusarium species are frequently isolated from pesticide‐exposed soils and the GP concentrations tested had a significant effect both on growth parameters and disease severity in maize. This study provides an approach to the effect of GP on Fusarium sp. growth and pathogenicity that reinforces the importance of evaluating all the factors that could affect feed and food production. © 2019 Society of Chemical Industry

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Differential effects of glyphosate and aminomethylphosphonic acid (AMPA) on photosynthesis and chlorophyll metabolism in willow plants

Cited by 140 publications

References 51 publications

Differential Tolerance of Clones of Eucalyptus grandis Exposed to Drift of the Herbicides Carfentrazone-Ethyl and Glyphosate

Differential Tolerance of Clones of Eucalyptus grandis Exposed to Drift of the Herbicides Carfentrazone-Ethyl and Glyphosate

Effects of sewage sludge on bio-accumulation of heavy metals in tomato seedlings

Effect of in vitro glyphosate on Fusarium spp. growth and disease severity in maize

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