An Integrated Phytoremediation Strategy for Chloroacetamide Herbicides in Soil

Hoagland, Robert E.; Zablotowicz, Robert M.; Locke, Martin A.

doi:10.1021/bk-1997-0664.ch007

Cited by 22 publications

(18 citation statements)

References 11 publications

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“…Arbuscular mycorrhizal plants to have been investigated to improve remediation of soils contaminated with chlorinated phenolic compounds, such as chloroacetamide herbicides (Hoagland et al, 1997), the deicing agent ethylene glycol (Rice et al, 1997), trichloroethylene (Gordon et al, 1997), polyaromatic hydrocarbons (Binet et al, 2000;Leyval and Binet, 1998;Qiu et al, 1997) and chlorinated phenols (Ensley et al, 1997). However, few studies examined explicitly the ability of arbuscular mycorrhizal fungi to degrade these chemicals, or the role of carbon allocation to the mycorrhizal fungus during the degradation process (Binet et al, 2000;Olexa et al, 2000;Leyval and Binet, 1998;Donnelly and Fletcher, 1994;Donnelly et al, 1994).…”

Section: Polychlorinated Aliphatic and Phenolic Compoundsmentioning

confidence: 99%

Influence of adverse soil conditions on the formation and function of Arbuscular mycorrhizas

Entry

Rygiewicz

Watrud

et al. 2002

Advances in Environmental Research

205

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The majority of plants have mycorrhizal fungi associated with them. Mycorrhizal fungi are ecologically significant because they form relationships in and on the roots of a host plant in a symbiotic association. The host plant provides the fungus with soluble carbon sources, and the fungus provides the host plant with an increased capacity to absorb water and nutrients from the soil. Adverse conditions are a pervasive feature in both natural and agronomic soils. The soil environment is constantly changing with regard to moisture, temperature and nutrient availability. In addition, soil properties are often manipulated to improve crop yields. In many cases, soils may be contaminated through disposal of chemicals that are toxic to plants and microorganisms. The formation and function of mycorrhizal relationships are affected by edaphic conditions such as soil composition, moisture, temperature, pH, cation exchange capacity, and also by anthropogenic stressors including soil compaction, metals and pesticides. Arbuscular mycorrhizal fungi are of interest for their reported roles in alleviation of diverse soil-associated plant stressors, including those induced by metals and polychlorinated aliphatic and phenolic pollutants. Much mycorrhizal research has investigated the impact of extremes in water, temperature, pH and inorganic nutrient availability on mycorrhizal formation and nutrient acquisition. Evaluation of the efficacy of plant-mycorrhizal associations to remediate soils contaminated with toxic materials deserves increased attention. Before the full potential benefits of arbuscular mycorrhizal fungi to reclaim contaminated soils can be realized, research advances are needed to improve our understanding of the physiology of mycorrhizae subjected to adverse physical and chemical conditions. This paper will review literature and discuss the implications of soil contamination on formation and function of arbuscular mycorrhizal associations. C

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Section: Polychlorinated Aliphatic and Phenolic Compoundsmentioning

confidence: 99%

Influence of adverse soil conditions on the formation and function of Arbuscular mycorrhizas

Entry

Rygiewicz

Watrud

et al. 2002

Advances in Environmental Research

205

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“…Na fitoestimulação, que é considerada uma forma de fitorremediação, ocorre a liberação de exsudatos radiculares e há o estímulo à atividade microbiana, que degrada o composto no solo, caracterizando, em algumas plantas, a aptidão rizosférica para a biorremediação de compostos tóxicos (Cunningham et al, 1996). Diversos trabalhos relatam o efeito positivo da utilização de plantas na descontaminação do solo (Anderson & Coats, 1995;Kruger et al, 1997;Hoagland et al, 1997). No Brasil, a pesquisa nessa área é ainda incipiente, não havendo relatos sobre o uso da fitorremediação de tebuthiuron.…”

Section: Abstract -This Study Aimed To Select Tebuthiuron-tolerant Plunclassified

Seleção de plantas com potencial para fitorremediação de tebuthiuron

et al. 2003

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RESUMO -Este trabalho teve como objetivo selecionar espécies tolerantes ao tebuthiuron, visando utilizá-las em programas de fitorremediação de solos contaminados com esse herbicida. ), aplicadas em pré-emergência, e quatro épocas de avaliação (15, 30, 45 e 60 dias após a semeadura). Foram avaliadas a fitotoxicidade do herbicida, a altura de plantas e a massa de matéria seca da parte aérea, de raízes e do total da planta. Canavalia ensiformes e Pennisetum typhoides foram tolerantes ao tebuthiuron na dose de 0,5 kg ha -1. Estizolobium aterrimum tolerou tebuthiuron até a dose de 1,0 kg ha -1 , apresentando fitotoxicidade menos acentuada e menor redução de altura de plantas e da massa de matéria seca da parte aérea, de raízes e do total da planta em relação ao tratamento testemunha.Palavras-chave: seletividade, fitotoxicidade, descontaminação, adubos verdes, plantas daninhas. (15, 30, 45, and 60 days after sowing). Phytotoxicity, plant height and, above-ground, root ABSTRACT -This study aimed to select tebuthiuron-tolerant plants to use them in

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“…Plants not only release exudates for microbial growth or cometabolism but also harbor microbial consortia and mycorrhizal fungi on the root surface. As a result, enhanced degradation of organic compounds occurs in the rhizosphere (13,18,19). However, there are cases in which the rhizosphere did not show enhanced degradation of organic compounds (17,18).…”

Section: Introductionmentioning

confidence: 99%

Influence of Microbial Inoculation (PseudomonasSp. Strain ADP), the Enzyme Atrazine Chlorohydrolase, and Vegetation on the Degradation of Atrazine and Metolachlor in Soil

Zhao

Arthur

Coats

2003

J. Agric. Food Chem.

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The concentrations of atrazine in the freshly added soils and the soils that had been incubated for 50 days significantly decreased 1 day after the addition of the enzyme atrazine chlorohydrolase or the soil bacterium Pseudomonas sp. strain ADP as compared with those in the uninoculated soils. Atrazine chlorohydrolase or ADP had no effect on the degradation of metolachlor. The half-lives of atrazine in the freshly added soils and in the aged soils after the treatment with atrazine chlorohydrolase or ADP markedly decreased as compared with those in the uninoculated soils. The half-lives of metolachlor in the aged soils were much longer than those of freshly added metolachlor. The percentage atrazine degraded in the freshly treated soils was much higher than that in the aged soils. This indicates that aging significantly decreased the bioavailability of atrazine. Vegetation significantly decreased the concentration of metolachlor. However, vegetation showed no effect on the degradation of atrazine. The concentrations of atrazine in the freshly added soils and the soils that had been incubated for 50 days significantly decreased 1 day after the addition of the enzyme atrazine chlorohydrolase or the soil bacterium Pseudomonas sp. strain ADP as compared with those in the uninoculated soils. Atrazine chlorohydrolase or ADP had no effect on the degradation of metolachlor. The half-lives of atrazine in the freshly added soils and in the aged soils after the treatment with atrazine chlorohydrolase or ADP markedly decreased as compared with those in the uninoculated soils. The half-lives of metolachlor in the aged soils were much longer than those of freshly added metolachlor. The percentage atrazine degraded in the freshly treated soils was much higher than that in the aged soils. This indicates that aging significantly decreased the bioavailability of atrazine. Vegetation significantly decreased the concentration of metolachlor. However, vegetation showed no effect on the degradation of atrazine.

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An Integrated Phytoremediation Strategy for Chloroacetamide Herbicides in Soil

Cited by 22 publications

References 11 publications

Influence of adverse soil conditions on the formation and function of Arbuscular mycorrhizas

Influence of adverse soil conditions on the formation and function of Arbuscular mycorrhizas

Seleção de plantas com potencial para fitorremediação de tebuthiuron

Influence of Microbial Inoculation (PseudomonasSp. Strain ADP), the Enzyme Atrazine Chlorohydrolase, and Vegetation on the Degradation of Atrazine and Metolachlor in Soil

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