Degradation of simazine by microorganisms isolated from soils of Spanish olive fields

Santiago-Mora, Raquel; Martin-Laurent, Fabrice; Prado, Rafael De; Franco, A. R.

doi:10.1002/ps.1097

Cited by 23 publications

(17 citation statements)

References 22 publications

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“…In one recent example with simazine as the herbicide and a number of different bacteria, TrzN, but not AtzA, was detected in the strains (55). Previously, AtzA, the atrazine chlorohydrolase from Pseudomonas sp.…”

Section: Enormous Metabolic Versatility From Three Catabolic Genes Anmentioning

confidence: 98%

Evolution of Catabolic Pathways: Genomic Insights into Microbial s -Triazine Metabolism

Shapir

Mongodin²,

Sadowsky

et al. 2007

J Bacteriol

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Section: Enormous Metabolic Versatility From Three Catabolic Genes Anmentioning

confidence: 98%

Evolution of Catabolic Pathways: Genomic Insights into Microbial s -Triazine Metabolism

Shapir

Mongodin²,

Sadowsky

et al. 2007

J Bacteriol

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“…paradoxus is catabolically diverse, utilizing a wide range of naturally occurring compounds as sole growth substrates (1, 4, 6, 8, 12, 13, 15, 21, 24, 29-31, 34, 40, 49). Variovorax species have also been observed to degrade a variety of contaminants (5,19,37,41,42,46,(50)(51)(52), including the herbicide atrazine (41). The S110 genome contains an array of genes supporting similar metabolic diversity, although many of the pathways were incompletely identified.…”

Section: General Genome Featuresmentioning

confidence: 99%

“…This metabolic capacity suggests that Variovorax plays an essential role in the natural cycling of biogenic chemicals. Variovorax species are also able to degrade a variety of contaminants, including pesticides and crude oil-associated S-metabolites (5,19,37,41,42,46,50,51,52), often in synergistic and mutually beneficial interactions with other bacteria. In addition, a close relative of Variovorax was found to be the central, nonphotosynthetic partner within the phototrophic consortium "Chlorochromatium aggregatum" (22).…”

mentioning

confidence: 99%

Complete Genome Sequence of the Metabolically Versatile Plant Growth-Promoting Endophyte Variovorax paradoxus S110

et al. 2011

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Variovorax paradoxus is a microorganism of special interest due to its diverse metabolic capabilities, including the biodegradation of both biogenic compounds and anthropogenic contaminants. V. paradoxus also engages in mutually beneficial interactions with both bacteria and plants. The complete genome sequence of V. paradoxus S110 is composed of 6,754,997 bp with 6,279 predicted protein-coding sequences within two circular chromosomes. Genomic analysis has revealed multiple metabolic features for autotrophic and heterotrophic lifestyles. These metabolic diversities enable independent survival, as well as a symbiotic lifestyle. Consequently, S110 appears to have evolved into a superbly adaptable microorganism that is able to survive in ever-changing environmental conditions. Based on our findings, we suggest V. paradoxus S110 as a potential candidate for agrobiotechnological applications, such as biofertilizer and biopesticide. Because it has many associations with other biota, it is also suited to serve as an additional model system for studies of microbeplant and microbe-microbe interactions.Variovorax paradoxus is a metabolically diverse, aerobic bacterium that engages in mutually beneficial interactions with a variety of bacteria and plants. V. paradoxus belongs to the subclass of Proteobacteria and can metabolically utilize natural compounds produced by other biota, such as acyl homoserine lactones (AHLs) (25) and alkyl/aryl-sulfonates (38). This metabolic capacity suggests that Variovorax plays an essential role in the natural cycling of biogenic chemicals. Variovorax species are also able to degrade a variety of contaminants, including pesticides and crude oil-associated S-metabolites (5,19,37,41,42,46,50,51,52), often in synergistic and mutually beneficial interactions with other bacteria. In addition, a close relative of Variovorax was found to be the central, nonphotosynthetic partner within the phototrophic consortium "Chlorochromatium aggregatum" (22). Moreover, V. paradoxus is resistant to various heavy metals, including cadmium and mercury (2).V. paradoxus belongs to a group referred to as plant growthpromoting rhizobacteria (PGPR), which exert beneficial effects on plant growth. As a common plant symbiont found in the rhizosphere (2, 3), the metabolic diversity of V. paradoxus appears to be related to its role as a PGPR. By degrading toxic contaminants, this bacterium can prevent harm otherwise experienced by the plant and thus can promote plant growth. Strains of Variovorax can enhance the host plant's stress tolerance and disease resistance (2, 3) and aid in nutrient availability and uptake (38). The effectiveness of Variovorax as a PGPR is likely to be more potent because it also appears to be a good endophytic symbiont (34,36,39,43,44,45,47) and thus interacts more closely with the host plant. Conversely, endospheric habitats are known to offer microbes the advantage of a more uniform and protective niche compared to the competitive, high-stress environment of the soil (36).The diverse metabol...

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“…In Spain, several cases of contamination of drinking water bodies by such herbicides have occurred in the last few years, a ecting the drinking water supply of many towns and greatly increasing the water puri cation costs. is has led authorities to prohibit or restrict the application of widely used active ingredients, such as simazine, diuron, terbuthylazine, or MCPA (Santiago-Mora et al, 2005). In olive groves, soil texture, pronounced slopes, and climatic conditions favor losses of the applied herbicides by leaching and runo processes (Celis et al, 2007).…”

mentioning

confidence: 99%

Organoclay‐Based Formulations to Reduce the Environmental Impact of the Herbicide Diuron in Olive Groves

Trigo

Celis

Hermosı́n

et al. 2009

Soil Science Soc of Amer J

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Ground and surface water contamination caused by undesirable transport losses of herbicides commonly applied to olive (Olea Europaea) groves in Spain and other Mediterranean countries is demanding strategies to reduce the environmental impact of such herbicides. In this work, organoclay‐based formulations of a herbicide widely applied to olive groves, diuron [3‐(3,4‐dichlorophenyl)‐1,1‐dimethyl urea], were prepared by preadsorbing the herbicide on three organoclays. Then, the ability of the organoclay‐based formulations to reduce the herbicide release rate and leaching potential in two soils as compared to a standard commercial formulation of the herbicide was assessed. The organoclays were obtained by treating Wyoming montmorillonite (SWy‐2) and Arizona montmorillonite (SAz‐1) with an amount of spermine (SPERM) or hexadecyltrimethylammonium (HDTMA) cations equal to 100% of the cation exchange capacity of the montmorillonites. Batch release and column leaching tests indicated that the organoclay‐based formulations of diuron made the release of the herbicide slower and reduced its leaching potential in soils, as compared with a standard commercial formulation containing the herbicide in a readily available form. Soil incubation experiments revealed that the persistence of the herbicide applied to soil as organoclay‐based formulations was only slightly prolonged compared with the herbicide applied in a readily available form, and that most herbicide in the formulations was ultimately available for degradation. The use of organoclay‐based formulations is proposed as a strategy to reduce extensive transport losses associated with the application of diuron in high‐risk scenarios, such as Mediterranean olive groves.

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Degradation of simazine by microorganisms isolated from soils of Spanish olive fields

Cited by 23 publications

References 22 publications

Evolution of Catabolic Pathways: Genomic Insights into Microbial s -Triazine Metabolism

Evolution of Catabolic Pathways: Genomic Insights into Microbial s -Triazine Metabolism

Complete Genome Sequence of the Metabolically Versatile Plant Growth-Promoting Endophyte Variovorax paradoxus S110

Organoclay‐Based Formulations to Reduce the Environmental Impact of the Herbicide Diuron in Olive Groves

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