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Horvath DP, Clay SA, Swanton CJ, Anderson JV, Chao WS. Response to Colbach et al. Trends Plant Sci 2023; 28:1331-1332. [PMID: 37778887 DOI: 10.1016/j.tplants.2023.09.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 09/12/2023] [Indexed: 10/03/2023]
Affiliation(s)
- David P Horvath
- USDA-ARS Edward T. Schafer Agricultural Research Center, Fargo, ND 58102, USA.
| | - Sharon A Clay
- South Dakota State University, Brookings, SD 57007, USA
| | | | - James V Anderson
- USDA-ARS Edward T. Schafer Agricultural Research Center, Fargo, ND 58102, USA
| | - Wun S Chao
- USDA-ARS Edward T. Schafer Agricultural Research Center, Fargo, ND 58102, USA
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2
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Horvath DP, Clay SA, Swanton CJ, Anderson JV, Chao WS. Weed-induced crop yield loss: a new paradigm and new challenges. Trends Plant Sci 2023; 28:567-582. [PMID: 36610818 DOI: 10.1016/j.tplants.2022.12.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [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: 07/11/2022] [Revised: 12/13/2022] [Accepted: 12/15/2022] [Indexed: 05/22/2023]
Abstract
Direct competition for resources is generally considered the primary mechanism for weed-induced yield loss. A re-evaluation of physiological evidence suggests weeds initially impact crop growth and development through resource-independent interference. We suggest weed perception by crops induce a shift in crop development, before resources become limited, which ultimately reduce crop yield, even if weeds are subsequently removed. We present the mechanisms by which crops perceive and respond to weeds and discuss the technologies used to identify these mechanisms. These data lead to a fundamental paradigm shift in our understanding of how weeds reduce crop yield and suggest new research directions and opportunities to manipulate or engineer crops and cropping systems to reduce weed-induced yield losses.
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Affiliation(s)
- David P Horvath
- USDA-ARS Edward T. Schafer Agricultural Research Center, Fargo, ND, USA.
| | | | | | - James V Anderson
- USDA-ARS Edward T. Schafer Agricultural Research Center, Fargo, ND, USA
| | - Wun S Chao
- USDA-ARS Edward T. Schafer Agricultural Research Center, Fargo, ND, USA
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House MA, Swanton CJ, Lukens LN. The neonicotinoid insecticide thiamethoxam enhances expression of stress-response genes in Zea mays in an environmentally specific pattern. Genome 2020; 64:567-579. [PMID: 33242262 DOI: 10.1139/gen-2020-0110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Recent studies indicate that thiamethoxam (TMX), a neonicotinoid insecticide, can affect plant responses to environmental stressors, such as neighboring weeds. The molecular mechanisms behind both stable and environmentally specific responses to TMX likely involve genes related to defense and stress responses. We investigated the effect of a TMX seed treatment on global gene expression in maize coleoptiles both under normal conditions and under low ratio red to far-red (R:FR) light stress induced by the presence of neighboring plants. The neighboring plant treatment upregulated genes involved in biotic and abiotic stress responses and affected specific photosynthesis and cell-growth related genes. Low R:FR light may enhance maize resistance to herbivores and pathogens. TMX appears to compromise resistance. The TMX treatment stably repressed many genes that encode proteins involved in biotic stress responses, as well as cell-growth genes. Notably, TMX effects on many genes' expression were conditional on the environment. In response to low R:FR, plants treated with TMX engage genes in the JA pathway, as well as other stress-related response pathways. Neighboring weeds may condition TMX-treated plants to become more stress tolerant.
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Affiliation(s)
- Megan A House
- Department of Plant Sciences, University of Saskatchewan, 51 Campus Drive, Saskatoon, SK S7N 5A8, Canada
| | - Clarence J Swanton
- Department of Plant Agriculture, University of Guelph, 50 Stone Rd. East, Guelph, ON N1G 2W1, Canada
| | - Lewis N Lukens
- Department of Plant Agriculture, University of Guelph, 50 Stone Rd. East, Guelph, ON N1G 2W1, Canada
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4
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KC KB, Dias GM, Veeramani A, Swanton CJ, Fraser D, Steinke D, Lee E, Wittman H, Farber JM, Dunfield K, McCann K, Anand M, Campbell M, Rooney N, Raine NE, Acker RV, Hanner R, Pascoal S, Sharif S, Benton TG, Fraser EDG. When too much isn't enough: Does current food production meet global nutritional needs? PLoS One 2018; 13:e0205683. [PMID: 30352069 PMCID: PMC6198966 DOI: 10.1371/journal.pone.0205683] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 09/29/2018] [Indexed: 01/19/2023] Open
Abstract
Sustainably feeding the next generation is often described as one of the most pressing “grand challenges” facing the 21st century. Generally, scholars propose addressing this problem by increasing agricultural production, investing in technology to boost yields, changing diets, or reducing food waste. In this paper, we explore whether global food production is nutritionally balanced by comparing the diet that nutritionists recommend versus global agricultural production statistics. Results show that the global agricultural system currently overproduces grains, fats, and sugars while production of fruits and vegetables and protein is not sufficient to meet the nutritional needs of the current population. Correcting this imbalance could reduce the amount of arable land used by agriculture by 51 million ha globally but would increase total land used for agriculture by 407 million ha and increase greenhouse gas emissions. For a growing population, our calculations suggest that the only way to eat a nutritionally balanced diet, save land and reduce greenhouse gas emissions is to consume and produce more fruits and vegetables as well as transition to diets higher in plant-based protein. Such a move will help protect habitats and help meet the Sustainable Development Goals.
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Affiliation(s)
- Krishna Bahadur KC
- Department of Geography, Environment and Geomatics, University of Guelph, Guelph, Canada
- * E-mail:
| | - Goretty M. Dias
- School of Environment, Enterprise and Development, University of Waterloo, Waterloo, Canada
| | - Anastasia Veeramani
- School of Environment, Enterprise and Development, University of Waterloo, Waterloo, Canada
| | | | - David Fraser
- Faculty of Land and Food Systems, The University of British Columbia, Vancouver, Canada
| | - Dirk Steinke
- Department of Integrative Biology, University of Guelph, Guelph, Canada
| | - Elizabeth Lee
- Department of Plant Agriculture, University of Guelph, Guelph, Canada
| | - Hannah Wittman
- Centre for Sustainable Food System, The University of British Columbia, Vancouver, Canada
| | - Jeffrey M. Farber
- Canadian Research Institute for Food Safety, University of Guelph, Guelph, Canada
| | - Kari Dunfield
- School of Environmental Sciences, University of Guelph, Guelph, Canada
| | - Kevin McCann
- Department of Integrative Biology, University of Guelph, Guelph, Canada
| | - Madhur Anand
- School of Environmental Sciences, University of Guelph, Guelph, Canada
| | - Malcolm Campbell
- Office of Research, University of Guelph, Guelph, Canada
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Canada
| | - Neil Rooney
- School of Environmental Sciences, University of Guelph, Guelph, Canada
| | - Nigel E. Raine
- School of Environmental Sciences, University of Guelph, Guelph, Canada
| | - Rene Van Acker
- Department of Plant Agriculture, University of Guelph, Guelph, Canada
| | - Robert Hanner
- Department of Integrative Biology, University of Guelph, Guelph, Canada
| | - Samantha Pascoal
- Department of Geography, Environment and Geomatics, University of Guelph, Guelph, Canada
| | - Shayan Sharif
- Department of Pathobiology, University of Guelph, Guelph, Canada
| | - Tim G. Benton
- School of Biology, University of Leeds, Leeds, United Kingdom
| | - Evan D. G. Fraser
- Department of Geography, Environment and Geomatics, University of Guelph, Guelph, Canada
- Arrell Food Institute, University of Guelph, Guelph, Canada
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Murphy GP, Van Acker R, Rajcan I, Swanton CJ. Identity recognition in response to different levels of genetic relatedness in commercial soya bean. R Soc Open Sci 2017; 4:160879. [PMID: 28280587 PMCID: PMC5319353 DOI: 10.1098/rsos.160879] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 12/01/2016] [Indexed: 05/09/2023]
Abstract
Identity recognition systems allow plants to tailor competitive phenotypes in response to the genetic relatedness of neighbours. There is limited evidence for the existence of recognition systems in crop species and whether they operate at a level that would allow for identification of different degrees of relatedness. Here, we test the responses of commercial soya bean cultivars to neighbours of varying genetic relatedness consisting of other commercial cultivars (intraspecific), its wild progenitor Glycine soja, and another leguminous species Phaseolus vulgaris (interspecific). We found, for the first time to our knowledge, that a commercial soya bean cultivar, OAC Wallace, showed identity recognition responses to neighbours at different levels of genetic relatedness. OAC Wallace showed no response when grown with other commercial soya bean cultivars (intra-specific neighbours), showed increased allocation to leaves compared with stems with wild soya beans (highly related wild progenitor species), and increased allocation to leaves compared with stems and roots with white beans (interspecific neighbours). Wild soya bean also responded to identity recognition but these responses involved changes in biomass allocation towards stems instead of leaves suggesting that identity recognition responses are species-specific and consistent with the ecology of the species. In conclusion, elucidating identity recognition in crops may provide further knowledge into mechanisms of crop competition and the relationship between crop density and yield.
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Kim HW, Amirsadeghi S, McKenzie-Gopsill A, Afifi M, Bozzo G, Lee EA, Lukens L, Swanton CJ. Changes in light quality alter physiological responses of soybean to thiamethoxam. Planta 2016; 244:639-50. [PMID: 27114265 DOI: 10.1007/s00425-016-2531-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 02/05/2016] [Accepted: 04/12/2016] [Indexed: 06/05/2023]
Abstract
MAIN CONCLUSION The interaction between neighboring weed-induced far-red enriched light and thiamethoxam can significantly alter soybean seedling morphology, nodulation, isoflavone levels, UV-absorbing phenolics, and carbon and nitrogen content. Neonicotinoid insecticides that are widely used on major crop plants can enhance plant growth and yield. Although the underlying mechanism of this enhanced growth and yield is not clear, recent studies suggest that neonicotinoids such as thiamethoxam (TMX) may exert their effects at least in part via signals that involve salicylic acid (SA) and jasmonic acid (JA). In the current research, effects of TMX on morphological and physiological responses of soybean have been compared under far-red-depleted (FR-D) and far-red-enriched (FR-E) light reflected by neighboring weeds. TMX significantly enhanced shoot and root growth but did not prevent stem elongation under FR-E light. Also, TMX did not prevent reductions in shoot carbon content and shoot carbon to nitrogen ratio under FR-E light. Despite similarities between these TMX effects in soybean and those known for SA and JA in other plant species, TMX significantly enhanced root-nodule numbers per plant and levels of root isoflavones malonyl-daidzin and malonyl-genistin under FR-E light only. These results suggest that the combined effect of FR-E light and TMX triggers a mechanism that operates concomitantly to enhance root isoflavones and nodulation in soybean.
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Affiliation(s)
- Hae Won Kim
- Department of Plant Agriculture, University of Guelph, 50 Stone Rd. East, Guelph, ON N1G 2W1, Canada
| | - Sasan Amirsadeghi
- Department of Plant Agriculture, University of Guelph, 50 Stone Rd. East, Guelph, ON N1G 2W1, Canada
| | - Andrew McKenzie-Gopsill
- Department of Plant Agriculture, University of Guelph, 50 Stone Rd. East, Guelph, ON N1G 2W1, Canada
| | - Maha Afifi
- Department of Plant Agriculture, University of Guelph, 50 Stone Rd. East, Guelph, ON N1G 2W1, Canada
| | - Gale Bozzo
- Department of Plant Agriculture, University of Guelph, 50 Stone Rd. East, Guelph, ON N1G 2W1, Canada
| | - Elizabeth A Lee
- Department of Plant Agriculture, University of Guelph, 50 Stone Rd. East, Guelph, ON N1G 2W1, Canada
| | - Lewis Lukens
- Department of Plant Agriculture, University of Guelph, 50 Stone Rd. East, Guelph, ON N1G 2W1, Canada
| | - Clarence J Swanton
- Department of Plant Agriculture, University of Guelph, 50 Stone Rd. East, Guelph, ON N1G 2W1, Canada.
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8
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Swanton CJ, Mashhadi HR, Solomon KR, Afifi MM, Duke SO. Similarities between the discovery and regulation of pharmaceuticals and pesticides: in support of a better understanding of the risks and benefits of each. Pest Manag Sci 2011; 67:790-797. [PMID: 21520394 DOI: 10.1002/ps.2179] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2010] [Revised: 02/03/2011] [Accepted: 02/25/2011] [Indexed: 05/30/2023]
Abstract
An argument is presented by which the role of pharmaceuticals and pesticides can both be viewed in terms of contributing to human health. Comparisons are made in terms of discovery and development, regulatory policies and environmental and human impacts. Both technologies target particular biological functions, and in many cases they target similar molecular sites of action. Pharmaceuticals and pesticides undergo a similar registration process; however, both can enter the environment where they can have adverse effects on non-target organisms and, if misused, will have detrimental effects on human health or the environment. It is suggested that the risks associated with the two technologies are similar. The rejection of pesticides by the general public is based primarily on personal value systems and the uncertainty of risk management. It is concluded that plant and animal health are vital to maintaining human health, and that pesticides used in food production are, as with pharmaceuticals, a vital tool used to maintain human health.
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Affiliation(s)
- Clarence J Swanton
- Department of Plant Agriculture, University of Guelph, Guelph, Ontario, Canada.
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9
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Powell JR, Levy-Booth DJ, Gulden RH, Asbil WL, Campbell RG, Dunfield KE, Hamill AS, Hart MM, Lerat S, Nurse RE, Pauls KP, Sikkema PH, Swanton CJ, Trevors JT, Klironomos JN. Effects of genetically modified, herbicide-tolerant crops and their management on soil food web properties and crop litter decomposition. J Appl Ecol 2009. [DOI: 10.1111/j.1365-2664.2009.01617.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Levy-Booth DJ, Gulden RH, Campbell RG, Powell JR, Klironomos JN, Pauls KP, Swanton CJ, Trevors JT, Dunfield KE. Roundup Ready soybean gene concentrations in field soil aggregate size classes. FEMS Microbiol Lett 2009; 291:175-9. [PMID: 19076230 DOI: 10.1111/j.1574-6968.2008.01449.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [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: 11/29/2022] Open
Abstract
Roundup Ready (RR) soybeans containing recombinant Agrobacterium spp. CP4 5-enol-pyruvyl-shikimate-3-phosphate synthase (cp4 epsps) genes tolerant to the herbicide glyphosate are extensively grown worldwide. The concentration of recombinant DNA from RR soybeans in soil aggregates was studied due to the possibility of genetic transformation of soil bacteria. This study used real-time PCR to examine the concentration of cp4 epsps in four field soil aggregate size classes (>2000 microm, 2000-500 microm, 500-250 microm and <250 microm). Aggregates over 2000 microm in diameter had significantly greater gene concentrations than those with diameters under 2000 microm. The >2000 mum fraction contained between 66.62% and 99.18% of total gene copies, although it only accounted for about 30.00% of the sampled soil. Aggregate formation may facilitate persistence of recombinant DNA.
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Affiliation(s)
- David J Levy-Booth
- Department of Environmental Biology, University of Guelph, Guelph, ON, Canada
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Levy-Booth DJ, Campbell RG, Gulden RH, Hart MM, Powell JR, Klironomos JN, Pauls KP, Swanton CJ, Trevors JT, Dunfield KE. Real-time polymerase chain reaction monitoring of recombinant DNA entry into soil from decomposing roundup ready leaf biomass. J Agric Food Chem 2008; 56:6339-47. [PMID: 18570434 DOI: 10.1021/jf800767g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Glyphosate-tolerant, Roundup Ready (RR) soybeans account for about 57% of all genetically modified (GM) crops grown worldwide. The entry of recombinant DNA into soil from GM crops has been identified as an environmental concern due to the possibility of their horizontal transfer to soil microorganisms. RR soybeans contain recombinant gene sequences that can be differentiated from wild-type plant and microbial genes in soil by using a sequence-specific molecular beacon and real-time polymerase chain reaction (PCR). A molecular beacon-based real-time PCR system to quantify a wild-type soybean lectin ( le1) gene was designed to compare amounts of endogenous soybean genes to recombinant DNA in soil. Microcosm studies were carried out to develop methodologies for the detection of recombinant DNA from RR soybeans in soil. RR soybean leaf litterbags were imbedded in the soil under controlled environmental conditions (60% water holding capacity, 10/15 degrees C, and 8/16 h day/night) for 30 days. The soybean biomass decomposition was described using a single-phase exponential equation, and the DNA concentration in planta and in soil was quantified using real-time PCR using sequence-specific molecular beacons for the recombinant cp4 epsps and endogenous soybean lectin ( le1) genes. The biomass of RR soybean leaves was 8.6% less than nontransgenic (NT) soybean leaves after 30 days. The pooled half-disappearance time for cp4 epsps and le1 in RR and of le1 in NT soybean leaves was 1.4 days. All genes from leaves were detected in soil after 30 days. This study provides a methodology for monitoring the entry of RR and NT soybean DNA into soil from decomposing plant residues.
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Affiliation(s)
- David J Levy-Booth
- Departments of Environmental Biology, Plant Agriculture, Integrative Biology, and Land Resource Science, University of Guelph, Guelph, ON, N1G 2W1, Canada
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Lerat S, Gulden RH, Hart MM, Powell JR, England LS, Pauls KP, Swanton CJ, Klironomos JN, Trevors JT. Quantification and persistence of recombinant DNA of Roundup Ready corn and soybean in rotation. J Agric Food Chem 2007; 55:10226-31. [PMID: 17997522 DOI: 10.1021/jf072457z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The presence of the recombinant cp4 epsps gene from Roundup Ready (RR) corn and RR soybean was quantified using real-time PCR in soil samples from a field experiment growing RR and conventional corn and soybean in rotation. RR corn and RR soybean cp4 epsps persisted in soil for up to 1 year after seeding. The concentration of recombinant DNA in soil peaked in July and August in RR corn and RR soybean plots, respectively. A small fraction of soil samples from plots seeded with conventional crops contained recombinant DNA, suggesting transgene dispersal by means of natural process or agricultural practices. This research will aid in the understanding of the persistence of recombinant DNA in agricultural cropping systems.
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Affiliation(s)
- Sylvain Lerat
- Departments of Environmental Biology, Plant Agriculture, and Integrative Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
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Powell JR, Gulden RH, Hart MM, Campbell RG, Levy-Booth DJ, Dunfield KE, Pauls KP, Swanton CJ, Trevors JT, Klironomos JN. Mycorrhizal and rhizobial colonization of genetically modified and conventional soybeans. Appl Environ Microbiol 2007; 73:4365-7. [PMID: 17483262 PMCID: PMC1932798 DOI: 10.1128/aem.00594-07] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [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: 03/14/2007] [Accepted: 05/01/2007] [Indexed: 11/20/2022] Open
Abstract
We grew plants of nine soybean varieties, six of which were genetically modified to express transgenic cp4-epsps, in the presence of Bradyrhizobium japonicum and arbuscular mycorrhizal fungi. Mycorrhizal colonization and nodule abundance and mass differed among soybean varieties; however, in no case was variation significantly associated with the genetic modification.
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Affiliation(s)
- Jeff R Powell
- Department of Integrative Biology, University of Guelph, Guelph, Ontario, Canada.
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Gulden RH, Lerat S, Hart MM, Powell JR, Trevors JT, Pauls KP, Klironomos JN, Swanton CJ. Quantitation of transgenic plant DNA in leachate water: real-time polymerase chain reaction analysis. J Agric Food Chem 2005; 53:5858-65. [PMID: 16028966 DOI: 10.1021/jf0504667] [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] [Indexed: 05/03/2023]
Abstract
Roundup Ready (RR) genetically modified (GM) corn and soybean comprise a large portion of the annual planted acreage of GM crops. Plant growth and subsequent plant decomposition introduce the recombinant DNA (rDNA) into the soil environment, where its fate has not been completely researched. Little is known of the temporal and spatial distribution of plant-derived rDNA in the soil environment and in situ transport of plant DNA by leachate water has not been studied before. The objectives of this study were to determine whether sufficient quantities of plant rDNA were released by roots during growth and early decomposition to be detected in water collected after percolating through a soil profile and to determine the influence of temperature on DNA persistence in the leachate water. Individual plants of RR corn and RR soybean were grown in modified cylinders in a growth room, and the cylinders were flushed with rain water weekly. Immediately after collection, the leachate was subjected to DNA purification followed by rDNA quantification using real-time Polymerase Chain Reaction (PCR) analysis. To test the effects of temperature on plant DNA persistence in leachate water, water samples were spiked with known quantities of RR soybean or RR corn genomic DNA and DNA persistence was examined at 5, 15, and 25 degrees C. Differences in the amounts and temporal distributions of root-derived rDNA were observed between corn and soybean plants. The results suggest that rainfall events may distribute plant DNA throughout the soil and into leachate water. Half-lives of plant DNA in leachate water ranged from 1.2 to 26.7 h, and persistence was greater at colder temperatures (5 and 15 degrees C).
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Affiliation(s)
- Robert H Gulden
- Department of Plant Agriculture, Environmental Biology, and Integrative Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
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15
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Lerat S, England LS, Vincent ML, Pauls KP, Swanton CJ, Klironomos JN, Trevors JT. Real-time polymerase chain reaction quantification of the transgenes for roundup ready corn and roundup ready soybean in soil samples. J Agric Food Chem 2005; 53:1337-42. [PMID: 15740003 DOI: 10.1021/jf048830+] [Citation(s) in RCA: 14] [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: 05/24/2023]
Abstract
A method for quantification of recombinant DNA for Roundup Ready (RR) corn and RR soybean in soil samples is described. Soil DNA from experimental field samples was extracted using a soil DNA extraction kit with a modified protocol. For the detection and quantification of recombinant DNA of RR corn and RR soybean, a molecular beacon and two pairs of specific primers were designed to differentially target recombinant DNA in these two genetically modified crops. Soil DNA extracts were spiked with RR corn or RR soybean DNA, and recombinant DNA was quantified using real-time PCR with a molecular beacon. As few as one copy of RR corn genome or one copy of RR soybean genome was detected in the soil DNA extract.
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Affiliation(s)
- S Lerat
- Department of Environmental Biology, of Plant Agriculture, and of Botany, University of Guelph, Guelph, Ontario, Canada
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