Translocation and Root Exudation of Glyphosate by Urochloa brizantha and its Transport on Sugarcane and Citrus Seedlings

Viti, Marcela Lembi; Alves, Pinto Antonio; Mendes, Kássio Ferreira; Pimpinato, Rodrigo Floriano; Guimarães, Ana Carolina Dias; Tornisielo, V.L.

doi:10.1590/s0100-83582019370100030

Cited by 8 publications

(3 citation statements)

References 20 publications

(20 reference statements)

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“…However, as the cultivation took place in pots in the current study, there was a volumetric limitation for dispersion/dissipation of the glyphosate exuded by the root system, which may result in a depressive/cumulative effect to stabilize the forage root system. Vitti et al (2019) evaluated the translocation and root exudation of glyphosate using U. brizantha and its transport in sugarcane and citrus and found insufficient exudates to harm the dry mass of agricultural crops. However, competitive superiority of plants occurs due to hormone effects, resulting in productive stimulus, especially initial growth speed (Barbosa et al, 2017).…”

Section: Glyphosatementioning

confidence: 99%

Glyphosate in the production and forage quality of marandu grass

Codognoto¹,

Conde²,

Maltoni³

et al. 2021

Semina: Ciênc. Agrár.

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The drift of the herbicide glyphosate, used for desiccating crops or controlling weeds, can result in growth-promoting or non-target plant development effects. Thus, it is possible to use the compound to increase the biomass of forage through the hormone effect. The objective of this study was to evaluate the effects of sublethal doses of glyphosate on the production of Urochloa brizantha cv. Marandu (Marandu grass) and its nutritional quality in ruminants. The design used was completely randomized, with five replications in a factorial scheme. The treatments used were as follows: control (without glyphosate application) and four sublethal doses of glyphosate (4, 10, 14, and 20 g ha-1 of the acid equivalent). The monthly collections consisted of collecting the plant material (0.20 m) from the surface, comprising of leaves and pseudocolmos (stem and leaf sheath) to determine the dry matter production and forage chemical-bromatological parameters. The results showed that leaf/stem ratio, neutral detergent fiber, and acid detergent fiber were affected exclusively by the harvest factor. The hormone effect of the herbicide occurs in the production of dry matter and lignin in the evaluated subdoses. For crude protein, there was an interaction between the factor doses and harvest, due to the effect of glyphosate and the management applied to the harvests, showing that the sublethal doses of glyphosate promoted the production of dry matter and the food quality of Marandu grass.

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Section: Glyphosatementioning

confidence: 99%

Glyphosate in the production and forage quality of marandu grass

Codognoto¹,

Conde²,

Maltoni³

et al. 2021

Semina: Ciênc. Agrár.

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“…On the other hand, herbicides and antibiotic pollutants are both anthropogenic perturbation agents that negatively affect the rhizosphere microbes, each of them impacts soil microbial metabolism differently. Herbicides can impact microbial communities in the rhizosphere through either inhibiting growth of beneficial rhizobacteria by disrupting key metabolic functions or by changing soil nutrients composition (Allegrini et al, 2015; Arango et al, 2014; Aristilde et al, 2017; Banks et al, 2014; Druille et al, 2015; Helander et al, 2018; Singh, Kumar, et al, 2020; Viti et al, 2019). Antibiotic pollution is critical due to the high rates of both the use of veterinary antibiotics (often as feeding supplement) and its excretion to the environments, which sometimes can be up to 100% of the ingested antibiotic without being metabolized by the animal (Kim et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Awaking the dormant virome in the rhizosphere

Braga

Schumacher

2023

Molecular Ecology

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The rhizosphere is a vital soil compartment providing key plant‐beneficial functions. However, little is known about the mechanisms driving viral diversity in the rhizosphere. Viruses can establish lytic or lysogenic interactions with their bacterial hosts. In the latter, they assume a dormant state integrated in the host genome and can be awakened by different perturbations that impact host cell physiology, triggering a viral bloom, which is potentially a fundamental mechanism driving soil viral diversity, as 22%–68% of soil bacteria are predicted to harbour dormant viruses. Here we assessed the viral bloom response in rhizospheric viromes by exposing them to three contrasting soil perturbation agents: earthworms, herbicide and antibiotic pollutant. The viromes were next screened for rhizosphere‐relevant genes and also used as inoculant on microcosms incubations to test their impacts on pristine microbiomes. Our results show that while post‐perturbation viromes diverged from control conditions, viral communities exposed to both herbicide and antibiotic pollutant were more similar to each other than those influenced by earthworms. The latter also favoured an increase in viral populations harbouring genes involved in plant‐beneficial functions. Post‐perturbation viromes inoculated on soil microcosms changed the diversity of pristine microbiomes, suggesting that viromes are important components of the soil ecological memory driving eco‐evolutionary processes that determine future microbiome trajectories according to past events. Our findings demonstrate that viromes are active players in the rhizosphere and need to be considered in efforts to understand and control the microbial processes towards sustainable crop production.

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“…The leachability of GLP could also be aggravated in soils that are phosphatesaturated or after phosphate addition to soil (De Jonge et al, 2001). Moreover, some studies emphasized that GLP could be released by root exudation when target plants start to decompose, bypassing the rootzone (Neumann et al, 2006;Laitinen et al, 2007;Viti et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Glyphosate and AMPA have low mobility through different soil profiles of the prosecco wine production area: A monitoring study in north-eastern Italy

Mencaroni

Cardinali²,

Costa³

et al. 2022

Front. Environ. Sci.

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Contamination of the environment by glyphosate (GLP) and its metabolite aminomethylphosphonic acid (AMPA) is still of major concern worldwide due to specific interactions among these molecules and soil and water. Two monitoring sites were established in the Prosecco wine production area (Conegliano and Valdobbiadene) in northeastern Italy, which has been included in UNESCO’s World Heritage List since 2019. The study aims to increase the knowledge about GLP dynamics in this area where it has been intensively used by farmers and the potential risk for groundwater pollution is still debated. Each site was equipped with two soil-water monitoring stations consisting of multisensor soil probes and suction cups at three soil depths (10, 30, and 70 cm). Soil and water were sampled for 10 and 6 months, respectively, and analyzed for GLP and AMPA concentrations, for a total of 242 samples to describe their vertical movement and dissipation dynamics. Soil properties, in particular, the different forms of Fe and Al oxide contents, and Freundlich adsorption coefficients were quantified along the soil profile. First attempts showed that glyphosate dissipation time was 36 ± 8 days in Conegliano and Valdobbiadene soils and fully completed in both after 6 months. In contrast, AMPA dissipation dynamic —first described by an original equation—was longer than that of GLP and fully dissipated after almost 300 days. GLP showed a strong binding affinity with clay and Fe and Al chelated to soil organic matter, which likely acted as cation bridges and in turn led to low GLP mobility. GLP and AMPA were mostly detected after heavy rainfall events at 70 cm depth, likely bypassing the porous matrix of the intermediate layers.

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Translocation and Root Exudation of Glyphosate by Urochloa brizantha and its Transport on Sugarcane and Citrus Seedlings

Cited by 8 publications

References 20 publications

Glyphosate in the production and forage quality of marandu grass

Glyphosate in the production and forage quality of marandu grass

Awaking the dormant virome in the rhizosphere

Glyphosate and AMPA have low mobility through different soil profiles of the prosecco wine production area: A monitoring study in north-eastern Italy

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