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Rivera-Becerril F, van Tuinen D, Chatagnier O, Rouard N, Béguet J, Kuszala C, Soulas G, Gianinazzi-Pearson V, Martin-Laurent F. Impact of a pesticide cocktail (fenhexamid, folpel, deltamethrin) on the abundance of Glomeromycota in two agricultural soils. Sci Total Environ 2017; 577:84-93. [PMID: 27817923 DOI: 10.1016/j.scitotenv.2016.10.098] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Revised: 10/07/2016] [Accepted: 10/14/2016] [Indexed: 06/06/2023]
Abstract
Pesticide contamination of the environment can result from agricultural practices. Persistence of pesticide residues is a threat to the soil biota including plant roots and beneficial microorganisms, which support an important number of soil ecosystem services. Arbuscular mycorrhizal fungi (AMF) are key symbiotic microorganisms contributing to plant nutrition. In the present study, we assessed whether AMF could indicate eventual side effects of pesticides when directly applied to field soils. We evaluated the ecotoxicological impact of a cocktail of three commonly used agricultural pesticides (fenhexamid, folpel, deltamethrin) on the abundance and composition of the AMF community in vineyard (Montagne de Saint-Emilion) and arable (Martincourt) soils subjected to different agricultural practices. The dissipation of applied pesticides was monitored by multiresidual analyses to determine the scenario of exposure of the AMF community. Diversity analysis before application of the pesticide cocktail showed that the AMF communities of vineyard soils, subjected to mechanical weeding or grass cover, and of the arable soil subjected to intensive agriculture, were dominated by Glomerales. Ribotypes specific to each soil and to each agricultural practice in the same soil were found, with the highest abundance and diversity of AMF being observed in the vineyard soil with a grass-cover. The abundance of the global AMF community (Glomeromycota) and of three taxa of AMF (Funneliformis mosseae, Claroideoglomus etunicatum/C. claroideum) was evaluated after pesticide application. The abundance of Glomeromycota decreased in both soils after pesticide application while the abundance of Claroideoglomus and F. mosseae decreased only in the arable soil. These results show that higher doses of pesticide exposure did not affect the global abundance, but altered the composition, of the AMF community. Resilience of the AMF community composition was observed only in the vineyard soil, where F. mosseae was the most tolerant taxon to pesticide exposure.
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Affiliation(s)
- Facundo Rivera-Becerril
- Agroécologie, AgroSup Dijon, CNRS, INRA, Univ. Bourgogne Franche-Comté, Dijon, France; Agroécologie, AgroSup Dijon, INRA, Univ. Bourgogne Franche-Comté, Dijon, France; Departamento El Hombre y su Ambiente, Universidad Autónoma Metropolitana-Xochimilco, Mexico City, Mexico
| | - Diederik van Tuinen
- Agroécologie, AgroSup Dijon, CNRS, INRA, Univ. Bourgogne Franche-Comté, Dijon, France.
| | - Odile Chatagnier
- Agroécologie, AgroSup Dijon, CNRS, INRA, Univ. Bourgogne Franche-Comté, Dijon, France
| | - Nadine Rouard
- Agroécologie, AgroSup Dijon, INRA, Univ. Bourgogne Franche-Comté, Dijon, France
| | - Jérémie Béguet
- Agroécologie, AgroSup Dijon, INRA, Univ. Bourgogne Franche-Comté, Dijon, France
| | - Catherine Kuszala
- Agroécologie, AgroSup Dijon, CNRS, INRA, Univ. Bourgogne Franche-Comté, Dijon, France
| | - Guy Soulas
- INRA/Université de Bordeaux 2, UMR Œnologie, Villenave Dornon, France
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Martins G, Lauga B, Miot-Sertier C, Mercier A, Lonvaud A, Soulas ML, Soulas G, Masneuf-Pomarède I. Characterization of epiphytic bacterial communities from grapes, leaves, bark and soil of grapevine plants grown, and their relations. PLoS One 2013; 8:e73013. [PMID: 24023666 PMCID: PMC3758280 DOI: 10.1371/journal.pone.0073013] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Accepted: 07/16/2013] [Indexed: 01/09/2023] Open
Abstract
Despite its importance in plant health and crop quality, the diversity of epiphytic bacteria on grape berries and other plant parts, like leaves and bark, remains poorly described, as does the role of telluric bacteria in plant colonization. In this study, we compare the bacterial community size and structure in vineyard soils, as well as on grapevine bark, leaves and berries. Analyses of culturable bacteria revealed differences in the size and structure of the populations in each ecosystem. The highest bacteria population counts and the greatest diversity of genera were found in soil samples, followed by bark, grapes and leaves. The identification of isolates revealed that some genera - Pseudomonas, Curtobacterium, and Bacillus - were present in all ecosystems, but in different amounts, while others were ecosystem-specific. About 50% of the genera were common to soil and bark, but absent from leaves and grapes. The opposite was also observed: grape and leaf samples presented 50% of genera in common that were absent from trunk and soil. The bacterial community structure analyzed by T-RFLP indicated similarities between the profiles of leaves and grapes, on the one hand, and bark and soil, on the other, reflecting the number of shared T-RFs. The results suggest an interaction between telluric bacterial communities and the epiphytic bacteria present on the different grapevine parts.
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Affiliation(s)
- Guilherme Martins
- USC Oenologie-INRA, Université Bordeaux Segalen, ISVV, Villenave d'Ornon, France
- Bordeaux Science Agro, Gradignan cedex, Bordeaux, France
| | - Béatrice Lauga
- Equipe Environnement et Microbiologie UMR IPREM 5254 IBEAS, Université de Pau et des Pays de l'Adour, Pau, France
| | - Cécile Miot-Sertier
- USC Oenologie-INRA, Université Bordeaux Segalen, ISVV, Villenave d'Ornon, France
| | - Anne Mercier
- USC Oenologie-INRA, Université Bordeaux Segalen, ISVV, Villenave d'Ornon, France
| | - Aline Lonvaud
- USC Oenologie-INRA, Université Bordeaux Segalen, ISVV, Villenave d'Ornon, France
| | - Marie-Louise Soulas
- USC Oenologie-INRA, Université Bordeaux Segalen, ISVV, Villenave d'Ornon, France
| | - Guy Soulas
- USC Oenologie-INRA, Université Bordeaux Segalen, ISVV, Villenave d'Ornon, France
| | - Isabelle Masneuf-Pomarède
- USC Oenologie-INRA, Université Bordeaux Segalen, ISVV, Villenave d'Ornon, France
- Bordeaux Science Agro, Gradignan cedex, Bordeaux, France
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Martins G, Miot-Sertier C, Lauga B, Claisse O, Lonvaud-Funel A, Soulas G, Masneuf-Pomarède I. Grape berry bacterial microbiota: Impact of the ripening process and the farming system. Int J Food Microbiol 2012; 158:93-100. [DOI: 10.1016/j.ijfoodmicro.2012.06.013] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Revised: 06/14/2012] [Accepted: 06/21/2012] [Indexed: 01/01/2023]
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El Sebaï T, Devers M, Lagacherie B, Rouard N, Soulas G, Martin-Laurent F. Diuron mineralisation in a Mediterranean vineyard soil: impact of moisture content and temperature. Pest Manag Sci 2010; 66:988-995. [PMID: 20730991 DOI: 10.1002/ps.1971] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
BACKGROUND The diuron-mineralising ability of the microbiota of a Mediterranean vineyard soil exposed each year to this herbicide was measured. The impact of soil moisture and temperature on this microbial activity was assessed. RESULTS The soil microbiota was shown to mineralise diuron. This mineralising activity was positively correlated with soil moisture content, being negligible at 5% and more than 30% at 20% soil moisture content. According to a double Gaussian model applied to fit the dataset, the optimum temperature/soil moisture conditions were 27.9 degrees C/19.3% for maximum mineralisation rate and 21.9 degrees C/18.3% for maximum percentage mineralisation. The impact of temperature and soil moisture content variations on diuron mineralisation was estimated. A simulated drought period had a suppressive effect on subsequent diuron mineralisation. This drought effect was more marked when higher temperatures were used to dry (40 degrees C versus 28 degrees C) or incubate (28 degrees C versus 20 degrees C) the soil. The diuron kinetic parameters measured after drought conditions were no longer in accordance with those estimated by the Gaussian model. CONCLUSION Although soil microbiota can adapt to diuron mineralisation, its activity is strongly dependent on climatic conditions. It suggests that diuron is not rapidly degraded under Mediterranean climate, and that arable Mediterranean soils are likely to accumulate diuron residues.
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Affiliation(s)
- Talaat El Sebaï
- INRA, Université de Bourgogne, UMR Microbiologie du Sol et de l'Environnement, Dijon, France
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Pascaud A, Amellal S, Soulas ML, Soulas G. A fluorescence-based assay for measuring the viable cell concentration of mixed microbial communities in soil. J Microbiol Methods 2009; 76:81-7. [DOI: 10.1016/j.mimet.2008.09.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2008] [Revised: 09/17/2008] [Accepted: 09/17/2008] [Indexed: 11/26/2022]
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El Sebai T, Lagacherie B, Soulas G, Martin-Laurent F. Spatial variability of isoproturon mineralizing activity within an agricultural field: geostatistical analysis of simple physicochemical and microbiological soil parameters. Environ Pollut 2007; 145:680-90. [PMID: 16979806 DOI: 10.1016/j.envpol.2006.05.034] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2006] [Accepted: 05/27/2006] [Indexed: 05/11/2023]
Abstract
We assessed the spatial variability of isoproturon mineralization in relation to that of physicochemical and biological parameters in fifty soil samples regularly collected along a sampling grid delimited across a 0.36 ha field plot (40 x 90 m). Only faint relationships were observed between isoproturon mineralization and the soil pH, microbial C biomass, and organic nitrogen. Considerable spatial variability was observed for six of the nine parameters tested (isoproturon mineralization rates, organic nitrogen, genetic structure of the microbial communities, soil pH, microbial biomass and equivalent humidity). The map of isoproturon mineralization rates distribution was similar to that of soil pH, microbial biomass, and organic nitrogen but different from those of structure of the microbial communities and equivalent humidity. Geostatistics revealed that the spatial heterogeneity in the rate of degradation of isoproturon corresponded to that of soil pH and microbial biomass.
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Affiliation(s)
- T El Sebai
- UMR Microbiologie et Géochimie des Sols, INRA/CMSE, 17 Rue Sully, BP 86510, 21065 Dijon Cedex, France
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Abstract
In the last 10 years, accelerated mineralization of Atrazine (2-chloro-ethylamino-6-isopropylamino-s-triazine) has been evidenced in agricultural soils repeatedly treated with this herbicide. Here, we report on the interaction between earthworms, considered as soil engineers, and the Atrazine-degrading community. The impact of earthworm macrofauna on Atrazine mineralization was assessed in representative soil microsites of earthworm activities (gut contents, casts, burrow linings). Soil with or without earthworms, namely the anecic species Lumbricus terrestris and the endogenic species Aporrectodea caliginosa, was either inoculated or not inoculated with Pseudomonas sp. ADP, an Atrazine-degrading strain, and was either treated or not treated with Atrazine. The structure of the bacterial community, the Atrazine-degrading activity and the abundance of atzA, B and C sequences in soil microsites were investigated. Atrazine mineralization was found to be reduced in representative soil microsites of earthworm activities. Earthworms significantly affected the structure of soil bacterial communities. They also reduced the size of the inoculated population of Pseudomonas sp. ADP, thereby contributing to the diminution of the Atrazine-degrading genetic potential in representative soil microsites of earthworm activities. This study illustrates the regulation produced by the earthworms on functional bacterial communities involved in the fate of organic pollutants in soils.
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Affiliation(s)
- Anne Kersanté
- CNRS/Université de Rennes 1, UMR 6553 ECOBIO, IFR CAREN, Rennes, France
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Vallaeys T, Topp E, Muyzer G, Macheret V, Laguerre G, Rigaud A, Soulas G. Evaluation of denaturing gradient gel electrophoresis in the detection of 16S rDNA sequence variation in rhizobia and methanotrophs. FEMS Microbiol Ecol 2006. [DOI: 10.1111/j.1574-6941.1997.tb00445.x] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Vallaeys T, Persello-Cartieaux F, Rouard N, Lors C, Laguerre G, Soulas G. PCR-RFLP analysis of 16S rRNA, tfdA and tfdB genes reveals a diversity of 2,4-D degraders in soil aggregates. FEMS Microbiol Ecol 2006. [DOI: 10.1111/j.1574-6941.1997.tb00444.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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El Sebai T, Lagacherie B, Soulas G, Martin-Laurent F. Isolation and characterisation of an isoproturon-mineralising Methylopila sp. TES from French agricultural soil. FEMS Microbiol Lett 2004; 239:103-10. [PMID: 15451107 DOI: 10.1016/j.femsle.2004.08.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2004] [Revised: 08/16/2004] [Accepted: 08/19/2004] [Indexed: 10/26/2022] Open
Abstract
Using enrichment culture three isoproturon (IPU) mineralising bacterial isolates were isolated from a French agricultural soil mineralising up to 50% of the initially added 14C-ring labelled IPU within only eight days. These isolates showed similar metabolic (BIOLOG GN) and amplified rDNA restriction (ARDRA) profiles. Partial 16S rDNA sequencing revealed that they were identical and identified as Methylopila sp TES. This strain harbours a large plasmid (220 kb) putatively bearing essential IPU-degrading genes as demonstrated by a curing experiment. Methylopila sp. TES transformed IPU and its known metabolites to CO2 and biomass but did not degrade chlorotoluron, monolinuron, diuron and linuron.
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Affiliation(s)
- Talaat El Sebai
- CMSE, UMR 1229 INRA/Université de Bourgogne, Microbiologie et Géochimie des Sols, 17 Rue Sully, BP 86510, 21065 Dijon Cedex, France
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Martin-Laurent F, Cornet L, Ranjard L, López-Gutiérrez JC, Philippot L, Schwartz C, Chaussod RÃ, Catroux GÃ, Soulas G. Estimation of atrazine-degrading genetic potential and activity in three French agricultural soils. FEMS Microbiol Ecol 2004; 48:425-35. [DOI: 10.1016/j.femsec.2004.03.008] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Devers M, Soulas G, Martin-Laurent F. Real-time reverse transcription PCR analysis of expression of atrazine catabolism genes in two bacterial strains isolated from soil. J Microbiol Methods 2004; 56:3-15. [PMID: 14706746 DOI: 10.1016/j.mimet.2003.08.015] [Citation(s) in RCA: 107] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The level of expression of highly conserved, plasmid-borne, and widely dispersed atrazine catabolic genes (atz) was studied by RT-qPCR in two telluric atrazine-degrading microbes. RT-qPCR assays, based on the use of real-time PCR, were developed in order to quantify atzABCDEF mRNAs in Pseudomonas sp. ADP and atzABC mRNAs in Chelatobacter heintzii. atz gene expression was expressed as mRNA copy number per 10(6) 16S rRNA. In Pseudomonas sp. ADP, atz genes were basally expressed. It confirmed atrazine-degrading kinetics indicating that catabolic activity starts immediately after adding the herbicide. atz gene expression increased transitorily in response to atrazine treatment. This increase was only observed while low amount of atrazine remained in the medium. In C. heintzii, only atzA was basally expressed. atzA and atzB expression levels were similarly and significantly increased in response to atrazine treatment. atzC was not expressed even in the presence of high amounts of atrazine. This study showed that atz genes are basally expressed and up-regulated in response to atrazine treatment. atz gene expression patterns are different in Pseudomonas ADP and C. heintzii suggesting that the host may influence the expression of plasmid-borne atrazine-catabolic potential.
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Affiliation(s)
- Marion Devers
- INRA-CMSE, UMR 1229 INRA-Université de Bourgogne, Microbiologie et Géochimie des Sols, 17 rue Sully, BP 86510, F-21065 Dijon Cedex, France
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Rousseaux S, Hartmann A, Lagacherie B, Piutti S, Andreux F, Soulas G. Inoculation of an atrazine-degrading strain, Chelatobacter heintzii Cit1, in four different soils: effects of different inoculum densities. Chemosphere 2003; 51:569-576. [PMID: 12615111 DOI: 10.1016/s0045-6535(02)00810-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The possibility to improve atrazine degradation in soils by bioaugmentation was studied. The atrazine-mineralizing strain, Chelatobacter heintzii Cit1, was inoculated in four sterile and four non-sterile soils, at varying inoculum densities. Two soils, which had shown enhanced atrazine mineralization, were used to determine which inoculum density was capable of restoring their original mineralizing capacity after sterilization. The two other soils, with intermediate and low capacity to mineralize atrazine, were used in order to demonstrate that atrazine mineralization in such soils could be improved by inoculation. Mineralization kinetics were fitted using the Gompertz model. In the case of soils adapted to atrazine mineralization, inoculation of C. heintzii did not accelerate the rate of atrazine mineralization, which was essentially performed by the indigenous microflora. However, with soils that did not mineralize atrazine, the introduction of 10(4) cfug(-1) resulted in a 3-fold increase of atrazine mineralization capacity.
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Affiliation(s)
- S Rousseaux
- Laboratoire de Microbiologie des Sols-Geosol, UMR INRA 111, 17 rue Sully, BP 86510, 21065 Dijon Cedex, France
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Piutti S, Semon E, Landry D, Hartmann A, Dousset S, Lichtfouse E, Topp E, Soulas G, Martin-Laurent F. Isolation and characterisation of Nocardioides sp. SP12, an atrazine-degrading bacterial strain possessing the gene trzN from bulk- and maize rhizosphere soil. FEMS Microbiol Lett 2003; 221:111-7. [PMID: 12694918 DOI: 10.1016/s0378-1097(03)00168-x] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
We report the characterisation of Nocardioides sp. SP12, an atrazine-degrading bacteria isolated from atrazine-treated bulk- and maize rhizosphere soil. Based on 16S rDNA alignment, strain SP12 showed close phylogenic relationships with Nocardioides sp. C157 and Nocardioides simplex. Internal transcribed spacer (ITS) sequences of strain SP12 were longer than those of other Nocardioides sp. and present Ala- and Ile-tRNA unlike Actinomycetales. Nocardioides sp. SP12 presents a novel atrazine catabolic pathway combining trzN with atzB and atzC. Atrazine biodegradation ends in a metabolite that co-eluted in HPLC with cyanuric acid. This metabolite shows an absorption spectrum identical to that of cyanuric acid with a maximal absorption at 214.6 nm. The mass of the atrazine metabolite is in concordance with that of cyanuric acid according to mass spectrometry analysis. Quantitative PCR revealed that the ITS sequence of Nocardioides sp. SP12 was at a lower number than the one of trzN in atrazine-treated soil samples. It suggests that trzN could also be present in other atrazine degrading bacteria. The numbers of trzN and ITS sequences of Nocardioides sp. SP12 were higher in the maize rhizosphere than in bulk soil.
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Affiliation(s)
- S Piutti
- INRA-CMSE, UMR 1229 INRA-Université de Bourgogne, Microbiologie et Géochimie des sols, 17 rue Sully, BP 86510, 21065 Dijon Cedex, France
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Martin-Laurent F, Piutti S, Hallet S, Wagschal I, Philippot L, Catroux G, Soulas G. Monitoring of atrazine treatment on soil bacterial, fungal and atrazine-degrading communities by quantitative competitive PCR. Pest Manag Sci 2003; 59:259-268. [PMID: 12639042 DOI: 10.1002/ps.630] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We report the development of quantitative competitive (QC) PCR assays for quantifying the 16S, 18S ribosomal and atzC genes in nucleic acids directly extracted from soil. QC-PCR assays were standardised, calibrated and evaluated with an experimental study aiming to evaluate the impact of atrazine application on soil microflora. Comparison of QC-PCR 16S and 18S results with those of soil microbial biomass showed that, following atrazine application, the microbial biomass was not affected and that the amount of 16S rDNA gene representing 'bacteria' increased transitorily, while the amount of 18S rDNA gene representing fungi decreased in soil. In addition, comparison of atzC QC-PCR results with those of atrazine mineralisation revealed that, in response to atrazine treatment, the amount of atzC gene increased transitorily in soil pre-treated with atrazine, suggesting that accelerated atrazine biodegradation in soil could be due to a transient increase in the size of the atrazine mineralising community.
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Affiliation(s)
- Fabrice Martin-Laurent
- INRA-CMSE, UMR 111 INRA-Université de Bourgogne, Microbiologie des Sols-Geosol, 17 rue Sully, BP 86510, 21 065 Dijon Cedex, France.
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Rousseaux S, Soulas G, Hartmann A. Plasmid localisation of atrazine-degrading genes in newly described Chelatobacter and Arthrobacter strains. FEMS Microbiol Ecol 2002; 41:69-75. [DOI: 10.1111/j.1574-6941.2002.tb00967.x] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Piutti S, Marchand AL, Lagacherie B, Martin-Laurent F, Soulas G. Effect of cropping cycles and repeated herbicide applications on the degradation of diclofop-methyl, bentazone, diuron, isoproturon and pendimethalin in soil. Pest Manag Sci 2002; 58:303-312. [PMID: 11975178 DOI: 10.1002/ps.459] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A greenhouse study was conducted to investigate the ability of four crops (wheat, corn, oilseed rape and soybean) to influence the degradation of bentazone, diclofop-methyl, diuron, isoproturon and pendimethalin in soil. The present study showed that microbial biomass-carbon was significantly higher in planted soils than in bulk soil, especially with wheat and corn, after several cropping cycles. The biomass in corn and soybean planted soils was adversely affected by bentazone but recovered after three cropping cycles. In wheat-planted soils, diclofop-methyl application resulted in persistent increase of the amount of microbial biomass. Bentazone did not show accelerated degradation even after five successive treatments, differing from diclofop-methyl, for which two applications were sufficient to enhance significantly its rate of degradation. Enhanced degradation of diclofop-methyl was even more pronounced in wheat-planted soil. The rates of mineralisation of diuron, isoproturon and pendimethalin were not affected after the first cropping cycle, but were significantly increased in planted soils after five cropping cycles. The results confirm that plants may promote pesticide degradation in soil by stimulating biodegradation processes. In the case of diclofop-methyl, stimulation of accelerated degradation was observed.
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Affiliation(s)
- Séverine Piutti
- INRA-CMSE, UMR Microbiologie des Sols-Geosol, BP 86510, 21065 Dijon, France
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Rousseaux S, Hartmann A, Soulas G. Isolation and characterisation of new Gram-negative and Gram-positive atrazine degrading bacteria from different French soils. FEMS Microbiol Ecol 2001; 36:211-222. [PMID: 11451526 DOI: 10.1111/j.1574-6941.2001.tb00842.x] [Citation(s) in RCA: 183] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
The capacity of 12 soils to degrade atrazine was studied in laboratory incubations using radiolabelled atrazine. Eight soils showed enhanced degradation of this compound. Twenty-five bacterial strains able to degrade atrazine were isolated by an enrichment method from 10 of these soils. These soils were chosen for their wide range of physico-chemical characteristics. Their history of treatment with atrazine was also variable. The genetic diversity of atrazine degraders was determined by amplified ribosomal restriction analysis (ARDRA) of the 16S rDNA gene with three restriction endonucleases. The 25 bacterial strains were grouped into five ARDRA types. By sequencing and aligning the 16S rDNA genes, the isolates were shown to belong to the Gram-negative species Chelatobacter heintzii, Aminobacter aminovorans, Stenotrophomonas maltophilia and to the Gram-positive genus Arthrobacter crystallopoietes. These species were not described previously as being capable of atrazine degradation. Most Gram-negative bacteria could mineralise (14)C ring labelled atrazine and carried the atzA, atzB, atzC and trzD genes. Gram-positive strains could convert atrazine to cyanuric acid and carried only the atzB and atzC genes. In this study, we describe the atrazine degradation capacities and corresponding genes in bacterial species that were not known as atrazine degraders. We report for the first time the occurrence of the trzD gene in these atrazine-mineralising bacteria and we demonstrate the potential use of colony hybridisation to isolate bacteria involved in atrazine degradation.
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Affiliation(s)
- S Rousseaux
- Laboratoire de Microbiologie des Sols, Centre de Microbiologie du Sol et de l'Environnement, INRA, 17 rue Sully, P.O. Box 86510, 21065 Cedex, Dijon, France
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Martin-Laurent F, Philippot L, Hallet S, Chaussod R, Germon JC, Soulas G, Catroux G. DNA extraction from soils: old bias for new microbial diversity analysis methods. Appl Environ Microbiol 2001; 67:2354-9. [PMID: 11319122 PMCID: PMC92877 DOI: 10.1128/aem.67.5.2354-2359.2001] [Citation(s) in RCA: 337] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The impact of three different soil DNA extraction methods on bacterial diversity was evaluated using PCR-based 16S ribosomal DNA analysis. DNA extracted directly from three soils showing contrasting physicochemical properties was subjected to amplified ribosomal DNA restriction analysis and ribosomal intergenic spacer analysis (RISA). The obtained RISA patterns revealed clearly that both the phylotype abundance and the composition of the indigenous bacterial community are dependent on the DNA recovery method used. In addition, this effect was also shown in the context of an experimental study aiming to estimate the impact on soil biodiversity of the application of farmyard manure or sewage sludge onto a monoculture of maize for 15 years.
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Affiliation(s)
- F Martin-Laurent
- UMR INRA MS Geosol, CMSE-INRA, 17 rue Sully, 21034 Dijon Cedex, France.
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Cavalca L, Hartmann A, Rouard N, Soulas G. Diversity of tfdC genes: distribution and polymorphism among 2,4-dichlorophenoxyacetic acid degrading soil bacteria. FEMS Microbiol Ecol 1999. [DOI: 10.1111/j.1574-6941.1999.tb00597.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Vallaeys T, Fulthorpe RR, Wright AM, Soulas G. The metabolic pathway of 2,4-dichlorophenoxyacetic acid degradation involves different families of tfdA and tfdB genes according to PCR-RFLP analysis. FEMS Microbiol Ecol 1996. [DOI: 10.1111/j.1574-6941.1996.tb00315.x] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Soulas G, Lagacherie B. Modelling of microbial processes that govern degradation of organic substrates in soil, with special reference to pesticides. Philos Trans R Soc Lond B Biol Sci 1990; 329:369-73. [PMID: 1979880 DOI: 10.1098/rstb.1990.0178] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
We tried to develop deterministic models for kinetics of 2,4-D breakdown in the soil based on the following considerations: (i) at low concentrations degradation results from maintenance consumption by a large fraction of the soil microbial population; (ii) at high concentration in addition to the maintenance consumption there is a growth-associated carbon incorporation by a small specific microbial population. Values for the biokinetic parameters are consistent with those commonly found in the literature. Comparison between observed and simulated curves suggests that a non-negligible part of the pesticidal carbon exists as microbial by-products.
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Affiliation(s)
- G Soulas
- INRA, Laboratoire de Microbiologie des Sols, Dijon, France
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