Biodegradação dos herbicidas imazetapir e imazapique em solo rizosférico de seis espécies vegetais

Souto, Kelen Müller; Jacques, Rodrigo Josemar Seminoti; Avila, Luis Antônio de; Machado, Sérgio Luiz de Oliveira; Zanella, Renato; Refatti, João Paulo

doi:10.1590/s0103-84782013001000010

Cited by 13 publications

(7 citation statements)

References 14 publications

(17 reference statements)

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“…Souto et al (2013) proved that plants of Stizolobium aterrimum release rhizodeposits that stimulate existing microbial activity in the rhizosphere upon degrading molecules of a formulated mixture of imazethapyr and imazapic present in soil under rice cultivation.…”

Section: Sources Of Variation Gl ------------------------------------mentioning

confidence: 99%

Phytoremediation of lowland soil contaminated with a formulated mixture of Imazethapyr and Imazapic1

Souto¹,

Avila²,

Cassol³

et al. 2015

Rev. Ciênc. Agron.

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-The use of plants to decontaminate water and soil contaminated with both organic and inorganic pollutants is a promising technology for sustainable agriculture. The aim of this work was to evaluate the efficiency of plant species in the remediation of formulated mixtures of imazethapyr and imazapic, using the irrigated rice cultivar IRGA 417 as bioindicator. The treatments consisted of the combination of 13 plant species with seven rates of a formulated mixture of imazethapyr and Imazapic (75+25 g e.a. L -1 respectively): 0, 200, 300, 400, 500, 1000 and 4000 mL ha -1. To evaluate the potential for phytoremediation in these species, symptoms of injury and plant height were measured in rice plants at 7, 14, 21 and 28 days after emergence and shoot dry weight at 28 days after emergence. Glycine max, Lolium multiflorum and Lotus corniculatus are potentially promising species in the phytoremediation of soils contaminated with the herbicide imazethapyr and imazapic (up to 4000 mL ha -1 ), due to being more adapted to hydromorphic environments, which is a feature found in soils cultivated with irrigated rice. Crotalaria juncea, Canavalia ensiformis, Stizolobium aterrimum, Vicia sativa, Raphanus sativus and Triticum aestivum are species capable of the phytoremediation of soils contaminated with imazethapyr + imazapic, however the occurrence of anoxia in hydromorphic soils reduce the establishment and development of these plants.Key words: Rice. Phytoremediation. Soil decontamination.RESUMO -O uso de plantas para descontaminar água e solo contaminados com poluentes orgânicos e inorgânicos é uma tecnologia promissora para a agricultura sustentável. Este trabalho teve como objetivo avaliar a eficiência de espécies vegetais na remediação da mistura formulada de imazetapir + imazapique, utilizando a cultivar de arroz irrigado IRGA 417 como planta bioindicadora. Os tratamentos foram compostos pela combinação entre 13 espécies vegetais e sete doses da mistura formulada de imazetapir + imazapique (75 + 25 g e.a. L -1 , respectivamente): zero, 200; 300; 400; 500; 1.000 e 4.000 mL ha -1 . Para a avaliação do pontecial fitorremediador dessas espécies foram avaliadas a altura e sintomas de fitointoxicação nas plantas de arroz irrigado, aos 7; 14; 21 e 28 dias após a emergência, e massa seca da parte aérea aos 28 dias após a emergência. Glycine max, Lolium multiflorum e Lotus corniculatus por serem mais adaptadas a ambientes hidromórficos, característica essa encontrada em solos cultivados com arroz irrigado, são espécies potencialmente promissoras em fitorremediar solos contaminados com o herbicida imazetapir + imazapique (até 4.000 mL ha -1 ). Crotalaria juncea, Canavalia ensiformis, Stizolobium aterrimum, Vicia sativa, Raphanus sativus e Triticum aestivum são espécies capazes de fitorremediar solos contaminados com imazetapir + imazapique, porém a ocorrência de anoxia em solos hidromórficos dificultam o estabelecimento e desenvolvimento das plantas.Palavras-chave: Arroz. Fitorremediação. Descontaminação de solo. *Autor ...

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Section: Sources Of Variation Gl ------------------------------------mentioning

confidence: 99%

Phytoremediation of lowland soil contaminated with a formulated mixture of Imazethapyr and Imazapic1

Souto¹,

Avila²,

Cassol³

et al. 2015

Rev. Ciênc. Agron.

Self Cite

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“…However, it would be important to quantify the persistence of this herbicide in the soil and climate conditions of that region, considering that the half-life of herbicides in soils depends on the chemical and physical characteristics, as well as the soil microbial activity. In this sense, Souto et al (2013) found 93% imazethapyr degradation in soybean rhizosphere soil at 63 DAA. According to those authors, imazethapyr degradation is greater in soils cultivated with plant species as they provide a more favorable environment for microbial activity.…”

Section: Resultsmentioning

confidence: 85%

“…In general, researches (Artuzi & Contiero, 2006;Dan et al, 2012;Souto et al, 2013) show an absence of imazethapyr residual effects from 90 DAA. Based on these results, maize cultivation in the off-season after application Table 7 -Control of maize in desiccation under cover crops and herbicides in desiccation management.…”

Section: Resultsmentioning

confidence: 91%

Volunteer RR® corn management in roundup ready® soybean-corn succession system

et al. 2015

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-The present study evaluated the effects of cover crops (Pennisetum glaucum, Crotalaria spectabilis and Urochloa ruziziensis) associated with the application of herbicides {glyphosate; (glyphosate + haloxyfop-R); (glyphosate + fluazifop-p-butyl); (glyphosate + imazethapyr) and (glyphosate + imazaquin)} in soybean desiccation management for volunteer RR® corn control. The experiment was conducted under field conditions at Sinop-MT, during the 2013/2014 crop season, in a randomized complete blocks design with factorial scheme and four replications. The following parameter were evaluated: dry matter of cover crops and ground coverage rate, control of volunteer RR ® corn present at the time of desiccation, dry matter, height and intoxication level on soybean plants caused by herbicides at 7, 14 and 28 days after emergence (DAE), control of volunteer RR ® corn derived from emergence fluxes subsequent to desiccation management and soybean yield. The joint application of (glyphosate + haloxyfop-R) provided the best level of volunteer RR ® corn control present at the time of desiccation. Satisfactory control (80%) of volunteer corn was obtained with the application of (glyphosate + imazethapyr). This treatment displayed an additional residual effect of imazethapyr, which efficiently controled volunteer RR ® corn derived from fluxes subsequent to desiccation management, especially in treatments performed under U. ruziziensis straw. None of the herbicides used in desiccation management caused any significant effect on dry matter, height and phytotoxicity of soybean plants at 7, 14 and 28 DAE nor on grain yield.

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“…Ryegrass can also act as a phytorremediator, decreasing the concentration of herbicide contamination in the soil (Souto et al, 2013;Galon et al, 2014). This process can occur through absorption by the plants and further metabolism or in some cases are due to stimulation of the soil microbiota associated with the remediation plants.…”

Section: Introductionmentioning

confidence: 99%

Elevated CO2 Concentrations and Water Stress Affect the Ability of Italian Ryegrass to Remediate Herbicides and Enhance its Allelopathic Effect

et al. 2019

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The long temporal persistence of select herbicides negatively impacts crops sown in succession to irrigated rice. One way to reduce these compounds in the soil over time is through phytoremediation. However, elevated CO2 concentrations may interfere with the phytoremediation process. Another consequence of climate change is the production of allelopathic compounds by forage species used as remedial agents. This study aimed to evaluate the impact of elevated CO2 concentration and drought stress on the remediation of soil samples contaminated with imazapyr + imazapic herbicides by Italian ryegrass and any subsequential affect on the allelopathic effect of this species. We report that the increasing CO2 decreased the phytoremediation potential of ryegrass. Water stress combined with a CO2 concentration of 700 µmol mol-1 caused increased allelopathy. Overall, these are the first data to indicate a significant effect of higher CO2 levels with respect to both phytoremediation efficacy and allelopathic potential of the plant species used in phytoremediation.

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Biodegradação dos herbicidas imazetapir e imazapique em solo rizosférico de seis espécies vegetais

Abstract: RESUMO A fi toestimulação é uma das técnicas de fi torremediação que pode ser utilizada para a redução da concentração dos herbicidas no solo. Para tanto é necessário a seleção de plantas que estimulem a atividade dos microrganismos

Cited by 13 publications

References 14 publications

Phytoremediation of lowland soil contaminated with a formulated mixture of Imazethapyr and Imazapic1

Phytoremediation of lowland soil contaminated with a formulated mixture of Imazethapyr and Imazapic1

Volunteer RR® corn management in roundup ready® soybean-corn succession system

Elevated CO2 Concentrations and Water Stress Affect the Ability of Italian Ryegrass to Remediate Herbicides and Enhance its Allelopathic Effect

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