Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2024-12-27T02:21:32.538Z Has data issue: false hasContentIssue false

Fate of transgenic plant DNA in the environment

Published online by Cambridge University Press:  26 October 2007

Alessandra Pontiroli
Affiliation:
Environmental Microbial Genomics Group, Laboratoire Ampère, École centrale de Lyon, 36 avenue Guy de Collongue, 69134 Ecully Cedex, France
Pascal Simonet
Affiliation:
Environmental Microbial Genomics Group, Laboratoire Ampère, École centrale de Lyon, 36 avenue Guy de Collongue, 69134 Ecully Cedex, France
Asa Frostegard
Affiliation:
Dept. of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, P.O. Box 5003, 1432 Aas, Norway
Timothy M. Vogel
Affiliation:
Environmental Microbial Genomics Group, Laboratoire Ampère, École centrale de Lyon, 36 avenue Guy de Collongue, 69134 Ecully Cedex, France
Jean-Michel Monier
Affiliation:
Environmental Microbial Genomics Group, Laboratoire Ampère, École centrale de Lyon, 36 avenue Guy de Collongue, 69134 Ecully Cedex, France

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

This review addresses the possible ecological effects of transgenic plants on micro-organisms in the field, hence, in the phytosphere and in the soil matrix. The important steps involved in the interaction between plant DNA and bacteria and the factors that influence the horizontal gene transfer (HGT) process will be discussed. HGT is a process in which two partners are involved, even if indirectly. In the first section, aspects concerning bacteria, such as their physico-chemical, biological and genetic characteristics, are described. Parameters affecting transgenic DNA fate in the environment are described in the second section. Subsequently, terrestrial habitats are evaluated in terms of their capacity to favor horizontal gene transfer. Finally, we focused on several studies in order to evaluate possible perturbations of soil bacterial community composition due to cultivation of transgenic plants in the field.

Type
Research Article
Copyright
© ISBR, EDP Sciences, 2007

References

Ahrenholtz, I, Lorenz, MG, Wackernagel, W (1994) The extracellular nuclease of Serratia marcescens: studies on the activity in vitro and effect on transforming DNA in a groundwater aquifer microcosm. Arch. Microbiol. 161: 176183
Altieri MA, Gurr GM, Wratten SD (2004) Genetic engineering and ecological engineering: A clash of paradigms or scope for synergy? In Gurr GM, Wratten SD, Altieri MA, eds, Ecological engineering for pest management: Advances in habitat manipulation for arthropods, Collingwood, Australia: CSIRO Publishing, pp 13–31
Ando, T, Xu, Q, Torres, M, Kusugami, K, Israel, DA, Blaser, MJ (2000) Restriction-modification system differences in Helicobacter pylori are a barrier to interstrain plasmid transfer. Mol. Microbiol. 37: 105265 CrossRef
Angle, JS (1994) Release of Transgenic Plants - Biodiversity and Population-Level Considerations. Mol. Ecol. 3: 4550 CrossRef
Aragao, FJL, Sarokin, L, Vianna, GR, Rech, EL (2000) Selection of transgenic meristematic cells utilizing a herbicidal molecule results in the recovery of fertile transgenic soybean [Glycine max (L.) Merril] plants at a high frequency. Theoret. Appl. Genet. 101: 16
Avery OT, MacLeod CM, McCarthy M (1944) Studies on the chemical nature of the substance inducing transformation of pneumococcal types. I. Induction of transformation by a deoxyribonucleic acid fraction isolated from Pneumococcus type III. J. Exp. Med. 79: 137
Barry G, Kishore G, Padgette S, Talor M, Kolacz K, Weldon M, Re D, Eichholtz D, Fincher K, Hallas L (1992) Inhibitors of amino acid biosynthesis: strategies for imparting glyphosate tolerance to plants. In Singh BK, Flores HE, Shannon JC, eds, Biosynthesis and Molecular Regulation of Amino Acids in Plants, American Society of Plant Physiology, pp 139–145
Baur, B, Hanselmann, K, Schlimme, W, Jenni, B (1996) Genetic transformation in freshwater: Escherichia coli is able to develop natural competence. Appl. Environ. Microbiol. 62: 36733678
Becker, R, Ulrich, A, Hedtke, C, Hornermeier, B (2001) Einfluss des Anbaus von transgenem herbizidresistentem Raps auf das Agrarökosystem. Bundesgesundheitsblatt Gesundheitsforschung Gesundheitsschutz 44: 159167 CrossRef
Belzile, FJ (2002) Transgenic, transplastomic and other genetically modified plants: a Canadian perspective. Biochimie 84: 11111118 CrossRef
Berndt, C, Meier, P, Wackernagel, W (2003) DNA restriction is a barrier to natural transformation in Pseudomonas stutzeri JM300. Microbiol. 149: 895901 CrossRef
Bertolla, F, Van Gijsegem, F, Nesme, X, Simonet, P (1997) Conditions for natural transformation of Ralstonia solanacearum. Appl. Environ. Microbiol. 63: 49654968
Bertolla, F, Frostegard, A, Brito, B, Nesme, X, Simonet, P (1999) During infection of its host, the plant pathogen Ralstonia solanacearum naturally develops a state of competence and exchanges genetic material. Mol. Plant Microbe Interact. 12: 467472 CrossRef
Bertolla, F, Pepin, R, Passelegue-Robe, E, Paget, E, Simkin, A, Nesme, X, Simonet, P (2000) Plant genome complexity may be a factor limiting in situ the transfer of transgenic plant genes to the phytopathogen Ralstonia solanacearum. Appl. Environ. Microbiol. 66: 41614167 CrossRef
Bickle, TA, Kruger, DH (1993) Biology of DNA restriction. Microbiol. Rev. 57: 434450
Björklöf, K, Suoniemi, A, Haahtela, K, Romantschuk, M (1995) High frequency of conjugation versus plasmid segregation of RP1 in epiphytic Pseudomonas syringae populations. Microbiol. 141: 27192727 CrossRef
Bolotin, A, Wincker, P, Mauger, S, Jaillon, O, Malarme, K, Weissenbach, J, Ehrlich, SD, Sorokin, A (2001) The complete genome sequence of the lactic acid bacterium Lactococcus lactis ssp. lactis IL1403. Genome Res. 11: 731753 CrossRef
Boyle JR, Lundkvist H, Smith CT (2001) Ecological considerations for potentially sustainable plantation forests. In Strauss SH, Bradshaw HD, eds, Proc. of the 1st Int. Symp. on Ecological and Societal Aspects of Transgenic Plantations, Stevenson, WA, 22–24 July 2001, College of Forestry, Oregon State University, Corvallis, pp 151–157
Bron S, Luxen E, Venema G (1980) Restriction and modification in Bacillus subtilis. Mol. Gen. Genet. 179: 103–110
Carrer, H, Hockenberry, TN, Svab, Z, Maliga, P (1993) Kanamycin resistance as a selectable marker for plastid transformation in tobacco. Mol. Gen. Genet. 241: 4956 CrossRef
Castaldini, M, Turrini, A, Sbrana, C, Benedetti, A, Marchionni, M, Mocali, S, Fabiani, A, Landi, S, Santomassimo, F, Pietrangeli, B, Nuti, MP, Miclaus, N, Giovannetti, M (2005) Impact of Bt corn on rhizospheric and soil eubacterial communities and on beneficial mycorrhizal symbiosis in experimental microcosms. Appl. Environ. Microbiol. 71: 67196729 CrossRef
Ceccherini, MT, Castialdini, M, Piovanelli, C, Hastings, RC, McCarthy, AJ, Bazzicalupo, M, Miclaus, N (1998) Effects of swine manure on autotrophic ammonia-oxidizing bacteria in soil microcosms. Appl. Soil. Ecol. 7: 149157 CrossRef
Ceccherini, M, Pote, J, Kay, E, Van, VT, Marechal, J, Pietramellara, G, Nannipieri, P, Vogel, TM, Simonet, P (2003) Degradation and transformability of DNA from transgenic leaves. Appl. Environ. Microbiol. 69: 673678 CrossRef
Cérémonie, H, Buret, F, Simonet, P, Vogel, TM (2004) Isolation of lightning-competent soil bacteria. Appl. Environ. Microbiol. 70: 63426346 CrossRef
Cérémonie H, Buret F, Simonet P, Vogel TM (2006) Natural electro-transformation of lightning competent Pseudomonas strain in artificial soil microcosms. Appl. Environ. Microbiol. 72: 2385–2389
Claverys, J-P, Martin, B (2003) Bacterial competence genes: signatures of active transformation, or only remnants? Trends Microbiol. 11: 161165 CrossRef
Comai, L, Facciotti, D, Hiatt, WR, Thompson, G, Rose, RE, Stalker, DM (1985) Expression in plants of a mutant aroA gene from Salmonella typhimurium confers tolerance to glyphosate. Nature 317: 741744 CrossRef
Comai L, Larson-Kelly N, Kiser J, Mau CJ, Pokalsky AR, Shewmaker CK, McBride K, Jones A, Stalker DM (1988) Chloroplast transport of a ribulose bisphosphate carboxylase small subunit-5-enolpyruvyl 3-phosphoshikimate synthase chimeric protein requires part of the mature small subunit in addition to the transit peptide. J. Biol. Chem. 263: 15104–15109
Crecchio, C, Stotzky, G (1998) Binding of DNA on humic acids: effect on transformation of Bacillus subtilis and resistance to DNase. Soil Biol. Biochem. 30: 10611067 CrossRef
Daniell, H, Muthukumar, B, Lee, SB (2001a) Marker free transgenic plants: engineering the chloroplast genome without the use of antibiotic selection. Curr. Genet. 39: 109116 CrossRef
Daniell, H, Wiebe, PO, Millan, AF (2001b) Antibiotic-free chloroplast genetic engineering - an environmentally friendly approach. Trends Plant Sci. 6: 237239 CrossRef
Daniell, H, Khan, MS, Allison, L (2002) Milestones in chloroplast genetic engineering: an environmentally friendly era in biotechnology. Trends Plant. Sci. 7: 8491 CrossRef
Davies, J (1994) Inactivation of antibiotics and the dissemination of resistance genes. Science 264: 375382 CrossRef
De Leij, F, Sutton, E, Whipps, J, Fenlon, J, Lynch, J (1995) Impact of field release of genetically modified Pseudomonas fluorescens on indigenous microbial populations of wheat. Appl. Environ. Microbiol. 61: 34433453
de Lipthay, JR, Barkay, T, Sorensen, SJ (2001) Enhanced degradation of phenoxyacetic acid in soil by horizontal transfer of the tfdA gene encoding a 2,4-dichlorophenoxyacetic acid dioxygenase. FEMS Microbiol. Ecol. 35: 7584 CrossRef
de Vries, J, Wackernagel, W (1998) Detection of nptII (kanamycin resistance) genes in genomes of transgenic plants by marker-rescue transformation. Mol. Gen. Genet. 257: 606613 CrossRef
de Vries, J, Wackernagel, W (2002) Integration of foreign DNA during natural transformation of Acinetobacter sp. by homology-facilitated illegitimate recombination. Proc Natl. Acad. Sci. USA 99: 20942099 CrossRef
de Vries J, Wackernagel W (2004) Microbial horizontal gene transfer and the DNA release from transgenic crop plants. Plant Soil 266: 91–104
de Vries, J, Meier, P, Wackernagel, W (2001) The natural transformation of the soil bacteria Pseudomonas stutzeri and Acinetobacter sp. by transgenic plant DNA strictly depends on homologous sequences in the recipient cells. FEMS Microbiol. Lett. 195: 211215 CrossRef
DeBlock, M, Herrera-Estrella, L, Van Montagu, M, Schell, J, Zambryski, P (1984) Expression of foreign genes in regenerated plants and in their progeny. EMBO J. 3: 16811689
DeBlock, M, Schell, J, Van Montagu M (1985) Chloroplast transformation by Agrobacterium tumefaciens. EMBO J. 4: 13671372
DeBlock, M, De Brower, D, Tenning, P (1989) Transformation of Brassica napus and Brassica oleracea using Agrobacterium tumefaciens and the expression of the bar and neo genes in the transgenic plants. Plant Physiol. 91: 694701 CrossRef
Della Cioppa, G, Christopher Bauer, S, Taylor, ML, Rochester, DE, Klein, BK, Shah, DM, Fraley, RT, Kishore, GM (1987) Targeting a herbicide-resistant enzyme from Escherichia coli to chloroplasts of higher plants. Nat. Biotech. 5: 579584 CrossRef
Demanèche, S, Bertolla, F, Buret, F, Nalin, R, Sailland, A, Auriol, P, Vogel, TM, Simonet, P (2001a) Laboratory-scale evidence for lightning-mediated gene transfer in soil. Appl. Environ. Microbiol. 67: 34403444 CrossRef
Demanèche, S, Jocteur-Monrozier, L, Quiquampoix, H, Simonet, P (2001b) Evaluation of biological and physical protection against nuclease degradation of clay-bound plasmid DNA. Appl. Environ. Microbiol. 67: 293299 CrossRef
Demanèche, S, Kay, E, Gourbière, F, Simonet, P (2001c) Natural transformation of Pseudomonas fluorescens and Agrobacterium tumefaciens in soil. Appl. Environ. Microbiol. 67: 26172621 CrossRef
Di Giovanni, GD, Watrud, LS, Seidler, RJ, Widmer, F (1999) Comparison of parental and transgenic alfalfa rhizosphere bacterial communities using Biolog GN metabolic fingerprinting and enterobacterial repetitive intergenic consensus sequence-PCR (ERIC-PCR). Microb. Ecol. 37: 129139 CrossRef
Donegan KK, Seidler RJ, Doyle JD, Porteous LA, Digiovanni G, Widmer F, Watrud LS (1999) A field study with genetically engineered alfalfa inoculated with recombinant Sinorhizobium meliloti: effects on the soil ecosystem. J. Appl. Ecol. 36: 920–936
Dubnau D (1999) DNA uptake in bacteria. Annu. Rev. Microbiol. 53: 217–244
Dunfield, KE, Germida, JJ (2001) Diversity of bacterial communities in the rhizosphere and root interior of field-grown genetically modified Brassica napus. FEMS Microbiol. Ecol. 38: 19 CrossRef
Dunfield, KE, Germida, JJ (2003) Seasonal changes in the rhizosphere microbial communities associated with field-grown genetically modified canola (Brassica napus). Appl. Environ. Microbiol. 69: 73107318 CrossRef
Dunfield, KE, Germida, JJ (2004) Impact of genetically modified crops on soil- and plant-associated microbial communities. J. Environ. Qual. 33: 806815 CrossRef
Dunwell, JM (1999) Transgenic Crops: The next generation, or an example of 2020 vision. Annals Botan. 84: 269277 CrossRef
Dykhuizen DE (1998) Santa Rosalia revisited: Why are there so many species of bacteria? Antonie van Leeuwenhoek 73: 25–33
Eichholtz DA, Rogers SG, Horsch RB, Klee HJ, Hayford M, Hoffmann NL, Braford SB, Fink C, Flick J, O'Connell KM, Froley RT (1987) Expression of mouse dihydrofolate reductase gene confers methotrexate resistance in transgenic petunia plants. Somatic Cell. Mol. Genet. 13: 67–76
Fraley, RT, Rogers, SG, Horsch, RB, Sanders, PR, Flick, JS, Adams, SP, Bittner, ML, Brand, LA, Fink, CL, Fry, JS, Galluppi, GR, Goldberg, SB, Hoffmann, NL, Woo, SC (1983) Expression of bacterial genes in plant cells. Proc. Natl. Acad. Sci. USA 80: 48034807 CrossRef
Franchi, M, Bramanti, E, Morassi Bonzi, L, Luigi Orioli, P, Vettori, C, Gallori, E (1999) Clay-nucleic acid complexes: characteristics and implications for the preservation of genetic material in primeval habitats. Orig. Life Evol. Biosph. 29: 297315 CrossRef
Freyssinet G, Pelissier B, Freyssinet M, Delon R (1996) Crops resistant to oxynils: from the laboratory to the market. Field Crops Res. 45: 125–133
Frostegard, A, Courtois, S, Ramisse, V, Clerc, S, Bernillon, D, Le Gall, F, Jeannin, P, Nesme, X, Simonet, P (1999) Quantification of bias related to the extraction of DNA directly from soils. Appl. Environ. Microbiol. 65: 54095420
Gallori, E, Bazzicalupo, M, Dal Canto, L, Fani, R, Nannipieri, P, Vettori, C, Stotzky, G (1994) Transformation of Bacillus subtilis by DNA bound on clay in non-sterile soil. FEMS Microbiol. Ecol. 15: 119126 CrossRef
Gebhard, F, Smalla, K (1998) Transformation of Acinetobacter sp. strain BD413 by transgenic sugar beet DNA. Appl. Environ. Microbiol. 64: 15501554
Gebhard, F, Smalla, K (1999) Monitoring field releases of genetically modified sugar beets for persistence of transgenic plant DNA and horizontal gene transfer. FEMS Microbiol. Ecol. 28: 261272 CrossRef
Goddijn, OJ, van der Duyn Schouten, PM, Schilperoort, RA, Hoge, JH (1993) A chimaeric tryptophan decarboxylase gene as a novel selectable marker in plant cells. Plant. Mol. Biol. 22: 907912 CrossRef
Goldstein, DA, Tinland, B, Gilbertson, LA, Staub, JM, Bannon, GA, Goodman, RE, McCoy, RL, Silvanovich, A (2005) Human safety and genetically modified plants: a review of antibiotic resistance markers and future transformation selection technologies. J. Appl. Microbiol. 99: 723 CrossRef
Gossele V, Aarssen R, Cornelissen M (1994) A 6' gentamicin acetyltransferase gene allows effective selection of tobacco transformants using kanamycin as a substrate. Plant Mol. Biol. 26: 2009–2012
Gough, KC, Hawes, WS, Kilpatrick, J, Whitelam, GC (2001) Cyanobacterial GR6 glutamate-1-semialdehyde aminotransferase: A novel enzyme-based selectable marker for plant transformation. Plant Cell Rep. 20: 296300
Graham, JB, Istock, CA (1978) Genetic exchange in Bacillus subtilis in soil. Mol. Genet. Genom. 166: 287290
Graham, JB, Istock, CA (1979) Gene exchange and natural selection cause Bacillus subtilis to evolve in soil culture. Science 204: 637639 CrossRef
Greaves, MP, Wilson, MJ (1970) The degradation of nucleic acids and montmorillonite-nucleic-acid complexes by soil microorganisms. Soil Biol. Biochem. 2: 257268 CrossRef
Greenpeace (2003) Monsanto out of our food. Greenpeace International Briefing for the World Social Forum, Porto Alegre, Brazil
Griffith, F (1928) The significance of pneumococcal types. J. Hyg. 27: 113159 CrossRef
Griffiths, B, Caul, S, Thompson, JA, Birch, N, Scrimgeour, C, Cortet, J, Foggo, A, Hackett, C, Henning Krogh P (2006) Soil microbial and faunal community responses to Bt maize and insecticide in two soils. J. Environ. Qual. 35: 734741 CrossRef
Guerineau, F, Brooks, L, Meadows, J, Lucy, A, Robinson, C, Mullineaux, P (1990) Sulfonamide resistance gene for plant transformation. Plant Mol. Biol. 15: 127136 CrossRef
Gulden, R, Lerat, HS, Hart, MM, Powell, JR, Trevors, JT, Pauls, PK, Klironomos, JN, Swanton, CJ (2005) Quantitation of transgenic plant DNA in Leachate water: real-time polymerase chain reaction analysis. J. Agric. Food Chem. 53: 58585865 CrossRef
Gyamfi, S, Pfeifer, U, Stierschneider, M, Sessitsch, A (2002) Effects of transgenic glufosinate-tolerant oilseed rape (Brassica napus) and the associated herbicide application on eubacterial and Pseudomonas communities in the rhizosphere. FEMS Microbiol. Ecol. 41: 181190 CrossRef
Hails, R, Kinderlerer, J (2003) The GM public debate: context and communication strategies. Nat. Rev. Genet. 4: 819825 CrossRef
Haldrup, A, Petersen, SG, Okkels, FT (1998a) Positive selection: a plant selection principle based on xylose isomerase, an enzyme used in the food industry. Plant Cell Rep. 18: 7681 CrossRef
Haldrup, A, Petersen, SG, Okkels, FT (1998b) The xylose isomerase gene from Thermoanaerobacterium thermosulfurogenes allows effective selection of transgenic plant cells using D-xylose as the selection agent. Plant Mol. Biol. 37: 287296 CrossRef
Hall, L, Topinka, K, Huffman, J, Davis, L, Good, A (2000) Pollen flow between herbicide-resistant Brassica napus is the cause of multiple-resistant B. napus volunteers. Weed Sci. 48: 688694 CrossRef
Hastings, RC, Ceccherini, MT, Miclaus, N, Saunders, JR, Bazzicalupo, M, McCarthy, AJ (1997) Direct molecular biological analysis of ammonia oxidising bacteria populations in cultivated soil plots treated with swine manure. FEMS Microbiol. Ecol. 23: 4554 CrossRef
Hayford, MB, Medford, JI, Hoffman, NL, Rogers, SG, Klee, HJ (1988) Development of a plant transformation selection system based on expression of genes encoding gentamycin acetyltransferases. Plant Physiol. 86: 12161222 CrossRef
Herrera-Estrella, L, De Block, M, Messens, E, Hernalsteen, J-P, Van Montagu, M, Schell, J (1983) Chimeric genes as dominant selectable markers in plant cells. EMBO J. 2: 987995
Heuer, H, Kroppenstedt, RM, Lottmann, J, Berg, G, Smalla, K (2002) Effects of T4 lysozyme release from transgenic potato roots on bacterial rhizosphere communities are negligible relative to natural factors. Appl. Environ. Microbiol. 68: 13251335 CrossRef
Hille, J, Verheggen, F, Roelvink, P, Franssen, H, Kammen, A, Zabel, P (1986) Bleomycin resistance: a new dominant selectable marker for plant cell transformation. Plant. Mol. Biol. 7: 171176 CrossRef
Hiltner, L (1904) Über neue Erfahrungen und Probleme auf dem Gebiete der Bodenbakteriologie. Arbeiten der Deutschen Landwirtschaftsgesellschaft 98: 5978
Horsch, RB, Fry, JE, Hoffmann, NL, Eicholtz, D, Rogers, SG, Fraley, RT (1985) A simple and general method for transferring genes into plants. Science 227: 12291231
Howe, AR, Gasser, CS, Brown, SM, Padgette, SR, Hart, J, Parker, GB, Fromm, ME, Armstrong, CL (2002) Glyphosate as a selective agent for the production of fertile transgenic maize (Zea mays) plants. Mol. Breed. 10: 153164 CrossRef
Irdani, T, Bogani, P, Mengoni, A, Mastromei, G, Buiatti, M (1998) Construction of a new vector conferring methotrexate resistance in Nicotiana tabacum plants. Plant Mol. Biol. 37: 10791084 CrossRef
James C (2006) Executive summary of global status of commercialized Biotech/GM Crops: 2006. ISAAA Briefs No. 35, ISAAA: Ithaca, NY
Jelenska, J, Tietze, E, Tempe, J, Brevet, J (2000) Streptothricin resistance as a novel selectable marker for transgenic plant cells. Plant Cell Rep. 19: 298303 CrossRef
Joersbo, M, Okkels, FT (1996) A novel principle for selection of transgenic plant cells: positive selection. Plant Cell Rep. 16: 219221 CrossRef
Joersbo, M, Donaldson, I, Kreiberg, J, Peterson, SG, Brunstedt, J, Okkels, FT (1998) Analysis of mannose selection used for transformation of sugar beet. Mol. Breed. 4: 111117 CrossRef
Kaeberlein, T, Lewis, K, Epstein, SS (2002) Isolating "uncultivable" microorganisms in pure culture in a simulated natural environment. Science 296: 11271129 CrossRef
Kay, E, Bertolla, F, Vogel, TM, Simonet, P (2002a) Opportunistic colonization of Ralstonia solanacearum-infected plants by Acinetobacter sp. and its natural competence development. Microbiol. Ecol. 43: 291297 CrossRef
Kay, E, Vogel, TM, Bertolla, F, Nalin, R, Simonet, P (2002b) In situ transfer of antibiotic resistance genes from transgenic (transplastomic) tobacco plants to bacteria. Appl. Environ. Microbiol. 68: 33453351 CrossRef
Khan, SM, Maliga, P (1999) Fluorescent antibiotic resistance marker for tracking plastid transformation in higher plants. Nat. Biotechnol. 17: 910915
Khanna, M, Stotzky, G (1992) Transformation of Bacillus subtilis by DNA bound on montmorillonite and effect of DNase on the transforming ability of bound DNA. Appl. Environ. Microbiol. 58: 19301939
Kobayashi, I (2001) Behavior of restriction-modification systems as selfish mobile elements and their impact on genome evolution. Nucl. Acids Res. 29: 37423756 CrossRef
Koziel, MG, Adams, TL, Hazlet, MA, Damm, D, Miller, J, Dahlbeck, D, Jayne, S, Staskawicz, BJ (1984) A cauliflower mosaic virus promoter directs expression of kanamycin resistance in morphogenic transformed plant cells. J. Mol. Appl. Genet. 2: 549562
Krens FA, Molendijk L, Wullems GJ, Schilperoort RA (1982) In vitro transformation of plant protoplasts with Ti-plasmid DNA. Nature 296: 72–74
Kunze, I, Ebneth, M, Heim, U, Geiger, M, Sonnewald, U, Herbers, K (2001) 2-Deoxyglucose resistance: A novel selection marker for plant transformation. Mol. Breed. 7: 221227 CrossRef
Lacks SA, Springhorn SS (1984) Transfer of recombinant plasmids containing the gene for DpnII DNA methylase into strains of Streptococcus pneumoniae that produce DpnI or DpnII restriction endonucleases. J. Bacteriol. 158: 905–909
Lederberg, J, Tatum, EL (1946) Gene recombination in Escherichia coli. Nature 158: 558 CrossRef
Li, YH, Lau, PC, Lee, JH, Ellen, RP, Cvitkovitch, DG (2001) Natural genetic transformation of Streptococcus mutans growing in biofilms. J. Bacteriol. 183: 897908 CrossRef
Li, YH, Tang, N, Aspiras, MB, Lau, PC, Lee, JH, Ellen, RP, Cvitkovitch, DG (2002) A quorum-sensing signaling system essential for genetic competence in Streptococcus mutans is involved in biofilm formation. J. Bacteriol. 184: 26992708 CrossRef
Lorenz MG, Sikorski J (2000) The potential for intraspecific horizontal gene exchange by natural genetic transformation: sexual isolation among genomovars of Pseudomonas stutzeri. Microbiol . 146: 3081–3090
Lorenz, MG, Wackernagel, W (1991) High frequency of natural genetic transformation of Pseudomonas stutzeri in soil extract supplemented with a carbon/energy and phosphorus source. Appl. Environ. Microbiol. 57: 12461251
Lorenz, MG, Wackernagel, W (1994) Bacterial gene transfer by natural genetic transformation in the environment. Microbiol. Rev. 58: 563602
Lukow, T, Dunfield, PF, Liesack, W (2000) Use of the T-RFLP technique to assess spatial and temporal changes in the bacterial community structure within an agricultural soil planted with transgenic and non-transgenic potato plants. FEMS Microbiol. Ecol. 32: 241247 CrossRef
Macneil DJ (1988) Characterization of a unique methyl-specific restriction system in Streptomyces avermitilis. J. Bacteriol. 170: 5607–5612
Majewski, J, Zawadzki, P, Pickerill, P, Cohan, FM, Dowson, CG (2000) Barriers to genetic exchange between bacterial species: Streptococcus pneumoniae transformation. J. Bacteriol. 182: 10161023 CrossRef
Maliga P, Svab Z, Harper EC, Jones JDG (1988) Improved expression of streptomycin resistance in plants due to a deletion in the streptomycin phosphotransferase coding sequence. Mol. Genet. Genom . 214: 456–459
Mansouri, H, Petit, A, Oger, P, Dessaux, Y (2002) Engineered rhizosphere: the trophic bias generated by opine-producing plants is independent of the opine type, the soil origin, and the plant species. Appl. Environ. Microbiol. 68: 25622566 CrossRef
Margulis L (1981) Symbiosis in Cell Evolution. WH Freeman and Company, New York
Marvier, M (2001) Ecology of transgenic crops. Am. Sci. 89: 160167 CrossRef
Marvier, M, van Acker, RC (2005) Can crop transgenes be kept on a leash? Front. Ecol. Environ. 3: 99106 CrossRef
Matic, I, Rayssiguier, C, Radman, M (1995) Interspecies gene exchange in bacteria: The role of SOS and mismatch repair systems in evolution of species. Cell 80: 507515 CrossRef
McFadden, GI (2001) Chloroplast origin and integration. Plant Physiol. 125: 5053 CrossRef
Meier P, Wackernagel W (2003a) Mechanisms of homology-facilitated illegitimate recombination for foreign DNA acquisition in transformable Pseudomonas stutzeri. Mol. Microbiol. 48: 1107–1118
Meier P, Wackernagel W (2003b) Monitoring the spread of recombinant DNA from field plots with transgenic sugar beet plants by PCR and natural transformation of Pseudomonas stutzeri. Transgenic Res. 12: 293–304
Melzak, KA, Sherwood, CS, Turner, RFB, Haynes, CA (1996) Driving forces for DNA adsorption to silica in perchlorate solutions. J. Coll. Interface Sci. 181: 635644 CrossRef
Mendum, TA, Clark, IM, Hirsch, PR (2001) Characterization of two novel Rhizobium leguminosarum bacteriophages from a field release site of genetically-modified rhizobia. Antonie van Leeuwenhoek 79: 189197 CrossRef
Miki, B, McHugh, S (2004) Selectable marker genes in transgenic plants: applications, alternatives and biosafety. J. Biotechnol. 107: 193232 CrossRef
Molin S, Tolker-Nielsen T (2003) Gene transfer occurs with enhanced efficiency in biofilms and induces enhanced stabilisation of the biofilm structure. Curr. Opin. Biotechnol. 14: 255–261
Motavalli, PP, Kremer, RJ, Fang, M, Means, NE (2004) Impact of genetically modified crops and their management on soil microbially mediated plant nutrient transformations. J. Environ. Qual. 33: 816824 CrossRef
Nakamura, Y, Itoh, T, Matsuda, H, Gobori, T (2004) Biased function of horizontally transferred genes in prokaryotic genomes. Nat. Genet. 36: 760766 CrossRef
Nannipieri, P, Ascher, J, Ceccherini, MT, Landi, L, Pietramellara, G, Renella, G (2003) Microbial diversity and soil functions. Europ. J. Soil Sci. 54: 655670 CrossRef
Nielsen, KM, Townsend, JP (2004) Monitoring and modeling horizontal gene transfer. Nat. Biotechnol. 22: 11101114 CrossRef
Nielsen, KM, van Elsas, JD (2001) Stimulatory effects of compounds present in the rhizosphere on natural transformation of Acinetobacter sp. BD413 in soil. Soil Biol. Biochem. 33: 345357 CrossRef
Nielsen, KM, van Weerelt, MD, Berg, TN, Bones, AM, Hagler, AN, van Elsas, JD (1997) Natural transformation and availability of transforming DNA to Acinetobacter calcoaceticus in soil microcosms. Appl. Environ. Microbiol. 63: 19451952
Nielsen, KM, Bones, AM, Smalla, K, van Elsas, JD (1998) Horizontal gene transfer from transgenic plants to terrestrial bacteria: a rare event? FEMS Microbiol. Rev. 22: 99103 CrossRef
Nielsen, KM, Smalla, K, van Elsas, JD (2000a) Natural transformation of Acinetobacter sp. strain BD413 with cell lysates of Acinetobacter sp., Pseudomonas fluorescens, and Burkholderia cepacia in soil microcosms. Appl. Environ. Microbiol. 66: 206212 CrossRef
Nielsen, KM, van Elsas, JD, Smalla, K (2000b) Transformation of Acinetobacter sp. strain BD413 (pFG4 ${\rm \Delta}$ nptII) with transgenic plant DNA in soil microcosms and effects of kanamycin on selection of transformants. Appl. Environ. Microbiol. 66: 12371242 CrossRef
Normander, B, Christensen, BB, Molin, S, Kroer, N (1998) Effect of bacterial distribution and activity on conjugal gene transfer on the phylloplane of the bush bean (Phaseolus vulgaris). Appl. Environ. Microbiol. 64: 19021909
Oger P, Petit A, Dessaux Y (1997) Genetically engineered plants producing opines alter their biological environment. Nat. Biotechnol. 15: 369–372
Oger, P, Mansouri, H, Dessaux, Y (2000) Effect of crop rotation and soil cover on alteration of the soil microflora generated by the culture of transgenic plants producing opines. Mol. Ecol. 9: 881890 CrossRef
Ogram, A, Sayler, GS, Gustin, D, Lewis, RJ (1988) DNA Adsorption to soils and sediments. Environ. Sci. Technol. 22: 982984 CrossRef
Olszewski, NE, Martin, FB, Ausubel, FM (1988) Specialized binary vector for plant transformation: expression of the Arabidopsis thaliana AHAS gene in Nicotiana tabacum. Nucleic Acids Res. 16: 1076510781 CrossRef
Otero, RDC, Hsieh, P (1995) Homologous recombination proteins in prokaryotes and eukaryotes. Annual Rev. Genet. 29: 509552 CrossRef
Ow, DW (2002) Recombinase-directed plant transformation for the post-genomic era. Plant. Mol. Biol. 48: 183200 CrossRef
Paget, E, Simonet, P (1994) On the track of natural transformation in soil. FEMS Microbiol. Ecol. 15: 109117 CrossRef
Paget E, Jocteur Monrozier L, Simonet P (1992) Adsorption of DNA on clay minerals: protection against DNase I and influence on gene transfer. FEMS Microbiol. Lett. 97: 31–40
Paget E, Lebrun M, Freyssinet G, Simonet P (1998) The fate of recombinant plant DNA in soil. Europ. J. Soil Biol. 34: 81–88
Perez, P, Tiraby, G, Kallerhoff, J, Perret, J (1989) Phleomycin resistance as a dominant selectable marker for plant cell transformation. Plant Mol. Biol. 13: 365373 CrossRef
Perl A, Galili S, Shaul O, Ben-Tzvi I, Galili G (1993) Bacterial dihydrodipicolinate synthase and desensitized aspartate kinase: Two novel selectable markers for plant transformation. Biotechnol. 11: 715–718
Pietramellara, G, Dal Canto, L, Vettori, C, Gallori, E, Nannipieri, P (1997) Effects of air-drying and wetting cycles on the transforming ability of DNA bound on clay minerals. Soil Biol. Biochem. 29: 5561 CrossRef
Pietramellara, G, Franchi, M, Gallori, E, Nannipieri, P (2001) Effect of molecular characteristics of DNA on its adsorption and binding on homoionic montmorillonite and kaolinite. Biol. Fertil. Soils 33: 402409
Poly, F, Chenu, C, Simonet, P, Rouiller, J, Jocteur Monrozier L (2000) Differences between linear chromosomal and supercoiled plasmid DNA in their mechanisms and extent of adsorption on clay minerals. Langmuir 16: 12331238 CrossRef
Poté, J, Ceccherini, M, Van, VT, Rosselli, W, Wildi, W, Simonet, P, Vogel, TM (2003) Fate and transport of antibiotic resistance genes in saturated soil columns. Europ. J. Soil Biol. 39: 6571 CrossRef
Prudhomme, M, Libante, V, Claverys, J-P (2002) Homologous recombination at the border: Insertion-deletions and the trapping of foreign DNA in Streptococcus pneumoniae. Proc. Natl. Acad. Sci. USA 99: 21002105 CrossRef
Quist D (2004) Transgene ecology: An ecological perspective for GMO risk assessment. In Breckling B, Verhoeven R, eds, Risk Hazard Damage - Specification of criteria to assess environmental impact of genetically modified organisms. Bundesamt für Naturschutz. Naturschutz und Biologische Vielfalt, Bonn, pp 239–244
Ray JL, Nielsen KM (2005) Experimental methods for assaying natural transformation and inferring horizontal gene transfer. In Zimmer EA, Roalson EH, eds, Methods in Enzymology, Academic Press, pp 491–520
Rayssiguier, C, Thaler, DS, Radman, M (1989) The barrier to recombination between Escherichia coli and Salmonella typhimurium is disrupted in mismatch-repair mutants. Nature 342: 396401 CrossRef
Redaschi N, Bickle TA (1996) Posttranscriptional regulation of EcoP1I and EcoP15I restriction activity. J. Mol. Biol. 257: 790–803
Roberts, MS, Cohan, FM (1993) The effect of DNA sequence divergence on sexual isolation in Bacillus. Genetics 134: 401408
Romanowski, G, Lorenz, MG, Wackernagel, W (1991) Adsorption of plasmid DNA to mineral surfaces and protection against DNase I. Appl. Environ. Microbiol. 57: 10571061
Romanowski, G, Lorenz, MG, Wackernagel, W (1993) Use of polymerase chain reaction and electroporation of Escherichia coli to monitor the persistence of extracellular plasmid DNA introduced into natural soils. Appl. Environ. Microbiol. 59: 34383446
Saxena, D, Stotzky, G (2000) Insecticidal toxin from Bacillus thuringiensis is released from roots of transgenic Bt corn in vitro and in situ. FEMS Microbiol. Ecol. 33: 3539 CrossRef
Saxena, D, Flores, S, Stotzky, G (1999) Insecticidal toxin in root exudates from Bt corn. Nature 402: 480
Schlüter, K, Fütterer, J, Potrykus, I (1995) Horizontal gene transfer from a transgenic potato line to a bacterial pathogen (Erwinia chrysanthemi) occurs – if at all – at an extremely low frequency. Biotechnol. 13: 10941098 CrossRef
Schmalenberger, A, Tebbe, CC (2002) Bacterial community composition in the rhizosphere of a transgenic, herbicide-resistant maize (Zea mays) and comparison to its non-transgenic cultivar Bosphore. FEMS Microbiol. Ecol. 40: 2937 CrossRef
Sengelov, G, Kowalchuk, GA, Sørensen, SJ (2000) Influence of fungal-bacterial interactions on bacterial conjugation in the residuesphere. FEMS Microbiol. Ecol. 31: 3945 CrossRef
Siciliano, SD, Germida, JJ (1999) Taxonomic diversity of bacteria associated with the roots of field-grown transgenic Brassica napus cv. Quest, compared to the non-transgenic B. napus cv. Excel and B. rapa cv. Parkland. FEMS Microbiol. Ecol. 29: 263272 CrossRef
Sikorski, J, Graupner, S, Lorenz, M, Wackernagel, W (1998) Natural genetic transformation of Pseudomonas stutzeri in a non-sterile soil. Microbiol. 144: 569576 CrossRef
Smiles, D (1988) Aspects of the physical environment of soil organisms. Biol. Fertil. Soils 6: 204215 CrossRef
Smith, HO, Danner, DB, Deich, RA (1981) Genetic transformation. Annu. Rev. Biochem. 50: 4168 CrossRef
Smith, H, Tomb, J, Dougherty, B, Fleischmann, R, Venter, J (1995) Frequency and distribution of DNA uptake signal sequences in the Haemophilus influenzae Rd genome. Science 269: 538540 CrossRef
Spoering, AL, Gilmore, MS (2006) Quorum sensing and DNA release in bacterial biofilms. Curr. Opin. Microbiol. 9: 133137 CrossRef
Stephens, PM, O'Sullivan, M, O'Gara F (1987) Effect of bacteriophage on colonization of sugar beet roots by fluorescent Pseudomonas spp. Appl. Environ. Microbiol. 53: 11641167
Stuy JH (1976) Restriction enzymes do not play a significant role in Haemophilus homospecific or heterospecific transformation. J. Bacteriol. 128: 212–220
Svab, Z, Maliga, P (1993) High-frequency plastid transformation in tobacco by selection for a chimeric aadA gene. Proc. Natl. Acad. Sci. USA 90: 913917 CrossRef
Svab, Z, Harper, EC, Jones, JDG, Maliga, P (1990) Aminoglycoside-3'-adenyltransferase confers resistance to spectinomycin and streptomycin in Nicotiana tabacum. Plant Mol. Biol. 14: 197205 CrossRef
Thomas, CM, Nielsen, KM (2005) Mechanisms of, and barriers to, horizontal gene transfer between bacteria. Nature 3: 711721
Trevors, JT (1996) Nucleic acids in the environment. Curr. Opin. Biotechnol. 7: 331336 CrossRef
Ursin VM (1996) Aldehyde dehydrogenase selectable markers for plant transformation. WO 96/12029
van Elsas, JD, Bailey, MJ (2002) The ecology of transfer of mobile genetic elements. FEMS Microbiol. Ecol. 42: 187197 CrossRef
van Elsas, JD, Turner, S, Bailey, MJ (2003) Horizontal gene transfer in the phytosphere. New Phytol. 157: 525537 CrossRef
Vettori, C, Paffetti, D, Pietramellara, G, Stotzky, G, Gallori, E (1996) Amplification of bacterial DNA bound on clay minerals by the random amplified polymorphic DNA (RAPD) technique. FEMS Microbiol. Ecol. 20: 251260 CrossRef
Waipara NW, Obanor FO, Walter M (2002) Impact of phylloplane management on microbial populations. New Zealand Pl. Prot. 55: 125–128
Waldron, C, Murphy, EB, Roberts, JL, Gustafson, GD, Armour, SL, Malcolm, SK (1985) Resistance to hygromycin B. Plant Mol. Biol. 5: 103108 CrossRef
Watrud L, Lee E, Fairbrother A, Burdick C, Reichman J, Bollman M, Storm M, King G, Van de Water P (2004) Evidence for landscape-level, pollen-mediated gene flow from genetically modified creeping bentgrass with CP4 EPSPS as a marker. Proc. Natl. Acad. Sci. USA 101: 14533–14538
Weeks, JT, Koshiyama, KY, Maier-Greiner, U, Schaeffner, T, Anderson, OD (2000) Wheat transformation using cyanamide as a new selective agent. Crop Sci. 40: 17491754 CrossRef
Widmer, F, Seidler, RJ, Donegan, KK, Reed, GL (1997) Quantification of transgenic plant marker gene persistence in the field. Mol. Ecol. 6: 17 CrossRef
Widmer F, Seidler RJ, Wartrud LS (1996) Sensitive detection of transgenic plant marker gene persistence in soil microcosms. Mol. Ecol. 5: 603–613
Wisniewski, JP, Frangne, N, Massonneau, A, Dumas, C (2002) Between myth and reality: genetically modified maize, an example of a sizeable scientific controversy. Biochimie 84: 10951103 CrossRef
Zahrt TC, Maloy S (1997) Barriers to recombination between closely related bacteria: MutS and RecBCD inhibit recombination between Salmonella typhimurium and Salmonella typhi. Proc. Natl. Acad. Sci. USA 94: 9786–9791
Zahrt, TC, Buchmeier, N, Maloy, S (1999) Effect of mutS and recD mutations on Salmonella virulence. Infect. Immun. 67: 61686172
Zhou, H, Arrowsmith, JW, Fromm, ME, Hironaka, CM, Taylor, ML, Rodriguez, D, Pajeau, ME, Brown, SM, Santino, CG, Fry, JE (1995) Glyphosate-tolerant CP4 and GOX genes as a selectable marker in wheat transformation. Plant Cell Rep. 15: 159163 CrossRef
Zinder N, Lederberg J (1952) Genetic exchange in Salmonella. J. Bacteriol. 64: 679–699