Stephen O Duke

Summary

Publications

  1. ncbi request reprint Review of potential environmental impacts of transgenic glyphosate-resistant soybean in Brazil
    Antonio L Cerdeira
    Brazilian Department of Agriculture, Agricultural Research Service, Jaguariuna, SP, Brazil
    J Environ Sci Health B 42:539-49. 2007
  2. doi request reprint Glyphosate: a once-in-a-century herbicide
    Stephen O Duke
    USDA ARS, Natural Products Utilization Research Unit, National Center for Natural Products Research, PO Box 8048, University, MS 38677, USA
    Pest Manag Sci 64:319-25. 2008
  3. pmc Alkylresorcinol synthases expressed in Sorghum bicolor root hairs play an essential role in the biosynthesis of the allelopathic benzoquinone sorgoleone
    Daniel Cook
    U S Department of Agriculture, Agricultural Research Service, Natural Products Utilization Research Unit, University, Mississippi 38677, USA
    Plant Cell 22:867-87. 2010
  4. doi request reprint A survey of phytotoxic microbial and plant metabolites as potential natural products for pest management
    Kevin K Schrader
    Natural Products Utilization Research Unit, U S Department of Agriculture Agricultural Research Service, University, MS 38677, USA
    Chem Biodivers 7:2261-80. 2010
  5. pmc Alkylresorcinol biosynthesis in plants: new insights from an ancient enzyme family?
    Scott R Baerson
    United States Department of Agriculture, Agricultural Research Service, Natural Products Utilization Research Unit, MS, USA
    Plant Signal Behav 5:1286-9. 2010
  6. ncbi request reprint A functional genomics investigation of allelochemical biosynthesis in Sorghum bicolor root hairs
    Scott R Baerson
    United States Department of Agriculture, Agricultural Research Service, Natural Products Utilization Research Unit, University, Mississippi 38677, USA
    J Biol Chem 283:3231-47. 2008
  7. pmc Antiprotozoal and antimicrobial compounds from the plant pathogen Septoria pistaciarum
    Mallika Kumarihamy
    National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, The University of Mississippi, University, Mississippi 38677, USA
    J Nat Prod 75:883-9. 2012
  8. doi request reprint Sorgoleone
    Franck E Dayan
    United States Department of Agriculture, Agricultural Research Service, Natural Products Utilization Research Unit, P O Box 8048, University, MS 38677, USA
    Phytochemistry 71:1032-9. 2010
  9. ncbi request reprint Algicidal and antifungal compounds from the roots of Ruta graveolens and synthesis of their analogs
    Kumudini M Meepagala
    USDA ARS, Natural Products Utilization Research Unit, P O Box 8048, University, MS 38677, USA
    Phytochemistry 66:2689-95. 2005
  10. doi request reprint Transcriptional responses to cantharidin, a protein phosphatase inhibitor, in Arabidopsis thaliana reveal the involvement of multiple signal transduction pathways
    Joanna Bajsa
    Natural Products Utilization Research Unit, USDA, ARS, University of Mississippi, University, MS 38677, USA
    Physiol Plant 143:188-205. 2011

Collaborators

Detail Information

Publications60

  1. ncbi request reprint Review of potential environmental impacts of transgenic glyphosate-resistant soybean in Brazil
    Antonio L Cerdeira
    Brazilian Department of Agriculture, Agricultural Research Service, Jaguariuna, SP, Brazil
    J Environ Sci Health B 42:539-49. 2007
    ....
  2. doi request reprint Glyphosate: a once-in-a-century herbicide
    Stephen O Duke
    USDA ARS, Natural Products Utilization Research Unit, National Center for Natural Products Research, PO Box 8048, University, MS 38677, USA
    Pest Manag Sci 64:319-25. 2008
    ..Adoption of resistance management practices will be required to maintain the benefits of glyphosate technologies for future generations...
  3. pmc Alkylresorcinol synthases expressed in Sorghum bicolor root hairs play an essential role in the biosynthesis of the allelopathic benzoquinone sorgoleone
    Daniel Cook
    U S Department of Agriculture, Agricultural Research Service, Natural Products Utilization Research Unit, University, Mississippi 38677, USA
    Plant Cell 22:867-87. 2010
    ..The sequences of ARS1 and ARS2 were also used to identify several rice (Oryza sativa) genes encoding ARSs, which are likely involved in the production of defense-related alkylresorcinols...
  4. doi request reprint A survey of phytotoxic microbial and plant metabolites as potential natural products for pest management
    Kevin K Schrader
    Natural Products Utilization Research Unit, U S Department of Agriculture Agricultural Research Service, University, MS 38677, USA
    Chem Biodivers 7:2261-80. 2010
    ..Our results further demonstrated that plants and microbes can provide a diverse and natural source of compounds with potential use as pesticides...
  5. pmc Alkylresorcinol biosynthesis in plants: new insights from an ancient enzyme family?
    Scott R Baerson
    United States Department of Agriculture, Agricultural Research Service, Natural Products Utilization Research Unit, MS, USA
    Plant Signal Behav 5:1286-9. 2010
    ....
  6. ncbi request reprint A functional genomics investigation of allelochemical biosynthesis in Sorghum bicolor root hairs
    Scott R Baerson
    United States Department of Agriculture, Agricultural Research Service, Natural Products Utilization Research Unit, University, Mississippi 38677, USA
    J Biol Chem 283:3231-47. 2008
    ..SbOMT3 is therefore proposed to be involved in the biosynthesis of the allelochemical sorgoleone...
  7. pmc Antiprotozoal and antimicrobial compounds from the plant pathogen Septoria pistaciarum
    Mallika Kumarihamy
    National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, The University of Mississippi, University, Mississippi 38677, USA
    J Nat Prod 75:883-9. 2012
    ..Compounds 5-7 also displayed moderate phytotoxic activity against both a dicot (lettuce, Lactuca sativa) and a monocot (bentgrass, Agrostis stolonifera) and cytotoxicity against a panel of cell lines...
  8. doi request reprint Sorgoleone
    Franck E Dayan
    United States Department of Agriculture, Agricultural Research Service, Natural Products Utilization Research Unit, P O Box 8048, University, MS 38677, USA
    Phytochemistry 71:1032-9. 2010
    ..Due to its hydrophobic nature, sorgoleone is strongly sorbed in soil which increases its persistence, but experiments show that it is mineralized by microorganisms over time...
  9. ncbi request reprint Algicidal and antifungal compounds from the roots of Ruta graveolens and synthesis of their analogs
    Kumudini M Meepagala
    USDA ARS, Natural Products Utilization Research Unit, P O Box 8048, University, MS 38677, USA
    Phytochemistry 66:2689-95. 2005
    ..None of the synthetic analogs showed comparable activities to rutacridone epoxide. The absolute stereochemistry of rutacridone was determined to be 2'(R) and that of rutacridone epoxide to be 2'(R), 3'(R) by CD and NMR analysis...
  10. doi request reprint Transcriptional responses to cantharidin, a protein phosphatase inhibitor, in Arabidopsis thaliana reveal the involvement of multiple signal transduction pathways
    Joanna Bajsa
    Natural Products Utilization Research Unit, USDA, ARS, University of Mississippi, University, MS 38677, USA
    Physiol Plant 143:188-205. 2011
    ..They function as negative regulators modifying receptor functions, thus altering signaling that influences transcriptional responses...
  11. pmc Serine/threonine protein phosphatases: multi-purpose enzymes in control of defense mechanisms
    Joanna Bajsa
    Natural Products Utilization Research Unit, Agricultural Research Service, United States Department of Agriculture, Oxford, MS, USA
    Plant Signal Behav 6:1921-5. 2011
    ....
  12. pmc Natural toxins for use in pest management
    Stephen O Duke
    Natural Products Utilization, Agricultural Research Service, United States Department of Agriculture, P O Box 8048, University, MS 38677, USA
    Toxins (Basel) 2:1943-62. 2010
    ..These and other examples of currently marketed natural product-based pesticides, as well as natural toxins that show promise as pesticides from our own research are discussed...
  13. ncbi request reprint Phytotoxic Eremophilanes from Ligularia macrophylla
    Charles L Cantrell
    USDA ARS, Natural Products Utilization Research Unit, University, MS 38677, USA
    J Agric Food Chem 55:10656-63. 2007
    ..At a concentration of 0.5% (wt/wt), 6beta-angeloyloxy-10beta-hydroxyfuranoeremophilane significantly reduced the consumption of filter paper by C. formosanus...
  14. doi request reprint Biochemical and structural consequences of a glycine deletion in the alpha-8 helix of protoporphyrinogen oxidase
    Franck E Dayan
    USDA ARS, Natural Products Utilization Research Unit, P O Box 8048, University, MS 38677, USA
    Biochim Biophys Acta 1804:1548-56. 2010
    ....
  15. doi request reprint Phytotoxicity of constituents of glandular trichomes and the leaf surface of camphorweed, Heterotheca subaxillaris
    Masanori Morimoto
    USDA ARS, Natural Products Utilization Research Unit, Box 8048, University, MS 38677, USA
    Phytochemistry 70:69-74. 2009
    ..Esterification of calamenene carboxylic acids decreased their biological activity...
  16. pmc Biologically active tetranorditerpenoids from the fungus Sclerotinia homoeocarpa causal agent of dollar spot in turfgrass
    H M T Bandara Herath
    National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, and Department of Medicinal Chemistry, School of Pharmacy, University of Mississippi, University, Mississippi 38677, USA
    J Nat Prod 72:2091-7. 2009
    ..Some of these compounds exhibited strong antiplasmodial activities as well, but they also had cytotoxic activity, thus precluding them as potential antimalarial agents...
  17. ncbi request reprint Aedes aegypti (Diptera: Culicidae) biting deterrence: structure-activity relationship of saturated and unsaturated fatty acids
    Abbas Ali
    The University of Mississippi, National Center for Natural Products Research, University, 38677, USA
    J Med Entomol 49:1370-8. 2012
    ..The MED ratio of the C11:0 and C11:1 for all three mosquito species indicated the C11 saturated and unsaturated acids as more repellent than their corresponding C12:0 and C12:1 homologues...
  18. doi request reprint Natural-product-based chromenes as a novel class of potential termiticides
    Kumudini M Meepagala
    USDA ARS, Natural Products Utilization Research Unit, University, MS 38677, USA
    Pest Manag Sci 67:1446-50. 2011
    ..Hence, with the increasing spread of termite infestation there is an increased need to discover effective, environmentally friendly and safe termite control agents with minimal mammalian toxicity...
  19. doi request reprint Phytotoxic activity of quinones and resorcinolic lipid derivatives
    Cassia S Mizuno
    Natural Products Utilization Research Unit, Agricultural Research Service, U S Department of Agriculture, University, Mississippi 38677 8048, USA
    J Agric Food Chem 58:4353-5. 2010
    ..Of the quinones, 2-hydroxy-5-methoxy-3-pentylcyclohexa-2,5-diene-1,4-dione, having a five-carbon side chain, showed phytotoxic activity similar to that of natural compound sorgoleone...
  20. doi request reprint Is (-)-catechin a novel weapon of spotted knapweed (Centaurea stoebe)?
    Stephen O Duke
    NPURU, USDA, ARS, University, Oxford, MS 38677, USA
    J Chem Ecol 35:141-53. 2009
    ..Our findings suggest that catechin is not a novel weapon of spotted knapweed and that other allelochemical(s) or alternative mechanisms must be found to explain the success of this species as an invader in North America...
  21. doi request reprint New class of algicidal compounds and fungicidal activities derived from a chromene amide of Amyris texana
    Kumudini M Meepagala
    Natural Products Utilization Research Unit, Agricultural Research Service, U S Department of Agriculture, P O Box 8048, University, Mississippi 38677 8048, USA
    J Agric Food Chem 58:9476-82. 2010
    ..Hydrochloride salts of a chromene amine analogue showed improved water solubility and selectivity toward P. perornata with activity comparable to that of the naturally occurring chromene amide...
  22. doi request reprint Natural products in crop protection
    Franck E Dayan
    Natural Products Utilization Research Unit, Agricultural Research Service, United States Department of Agriculture, University, MS 38677, USA
    Bioorg Med Chem 17:4022-34. 2009
    ..This review covers the historical use of natural products in agricultural practices, the impact of natural products on the development of new pesticides, and the future prospects for natural products-based pest management...
  23. pmc Omics methods for probing the mode of action of natural and synthetic phytotoxins
    Stephen O Duke
    NPURU, USDA, ARS, P O Box 8048, University, MS 38677, USA
    J Chem Ecol 39:333-47. 2013
    ..Such information can be useful in understanding the full impact of natural phytotoxins in both agricultural and natural ecosystems...
  24. ncbi request reprint Somatic mutation-mediated evolution of herbicide resistance in the nonindigenous invasive plant hydrilla (Hydrilla verticillata)
    Albrecht Michel
    USDA ARS, Natural Products Utilization Research Unit, PO Box 8048, University, Mississippi 38677, USA
    Mol Ecol 13:3229-37. 2004
    ..As hydrilla spread rapidly to lakes across the southern United States in the past, the expansion of resistant biotypes is likely to pose significant environmental challenges in the future...
  25. ncbi request reprint Plasmodium falciparum serine/threonine phoshoprotein phosphatases (PPP): from housekeeper to the 'holy grail'
    Joanna Bajsa
    United States Department of Agriculture Natural Products Utilization Research Unit, National Center for Natural Products Research, University, MS 38677, USA
    Curr Drug Targets 9:997-1012. 2008
    ..Identification of distinct molecular and functional characteristics of these enzymes shall be useful in designing selective inhibitors of plasmodial PPPs as potential new antimalarials...
  26. ncbi request reprint Taking stock of herbicide-resistant crops ten years after introduction
    Stephen O Duke
    Natural Products Utilization Research, Agricultural Research Service, United States Department of Agriculture, PO Box 8048, University, Mississippi 38677, USA
    Pest Manag Sci 61:211-8. 2005
    ....
  27. pmc Modes of action of microbially-produced phytotoxins
    Stephen O Duke
    United States Department of Agriculture, Agricultural Research Service, Natural Products Utilization Research Unit, P O Box 8048, MS 38677, USA
    Toxins (Basel) 3:1038-64. 2011
    ..Examples of the compounds discussed are tentoxin, AAL-toxin, auscaulitoxin aglycone, hydantocidin, thaxtomin, and tabtoxin...
  28. doi request reprint Isolation and identification of antifungal fatty acids from the basidiomycete Gomphus floccosus
    Charles L Cantrell
    Natural Products Utilization Research Unit, Agricultural Research Service, U S Department of Agriculture, University, Mississippi 38677, USA
    J Agric Food Chem 56:5062-8. 2008
    ..At 120 h of treatment, the IC50 values for compounds 1, 2, and 3 for P. obscurans were 1.0, 4.5, and 23 microM, respectively, as compared to 1.1 microM for the captan positive control...
  29. ncbi request reprint p-Hydroxyphenylpyruvate dioxygenase is a herbicidal target site for beta-triketones from Leptospermum scoparium
    Franck E Dayan
    United States Department of Agriculture, Agricultural Research Service, Natural Products Utilization Research Unit, P O Box 8048, University, MS 38677, USA
    Phytochemistry 68:2004-14. 2007
    ..Computational analysis of the catalytic domain of HPPD indicates that a lipophilic domain proximate from the Fe2+ favors the binding of ligands with lipophilic moieties...
  30. ncbi request reprint Phytotoxic and antifungal compounds from two Apiaceae species, Lomatium californicum and Ligusticum hultenii, rich sources of Z-ligustilide and apiol, respectively
    Kumudini M Meepagala
    USDA ARS, Natural Products Utilization Research Unit, MS 38677, USA
    J Chem Ecol 31:1567-78. 2005
    ..Seeds of L. californicum and L. hultenii were found to be rich sources of Z-ligustilide (97 mg/g of dry seed) and apiol (40 mg/g of dry seed), respectively...
  31. ncbi request reprint Zebra mussel antifouling activity of the marine natural product aaptamine and analogs
    Jeffrey A Diers
    Department of Pharmacognosy, Research Institute of Pharmaceutical Sciences, School of Pharmacy, The University of Mississippi, University, MS 38677, USA
    Mar Biotechnol (NY) 8:366-72. 2006
    ....
  32. doi request reprint The antiplasmodial activity of norcantharidin analogs
    Joanna Bajsa
    USDA, ARS, Natural Products Utilization Research Unit, University, MS 38677, USA
    Bioorg Med Chem Lett 20:6688-95. 2010
    ..Surprisingly, seven norcantharimides also displayed good antiplasmodial activity with the most potent, 5 returning D6=8.9±0.9 and W2 IC(50)=12.5±2.2 μM, representing a fivefold enhancement over norcantharidin...
  33. ncbi request reprint Functional characterization of desaturases involved in the formation of the terminal double bond of an unusual 16:3Delta(9,12,150) fatty acid isolated from Sorghum bicolor root hairs
    Zhiqiang Pan
    United States Department of Agriculture, Agricultural Research Service, Natural Products Utilization Research Unit, University of Mississippi, University, Mississippi 38677, USA
    J Biol Chem 282:4326-35. 2007
    ..Collectively, the present results strongly suggest that these fatty acid desaturases represent key enzymes involved in the biosynthesis of the allelochemical sorgoleone...
  34. pmc Glyphosate effects on plant mineral nutrition, crop rhizosphere microbiota, and plant disease in glyphosate-resistant crops
    Stephen O Duke
    USDA, ARS Natural Products Utilization Research Unit, P O Box 8048, University, Mississippi 38677, USA
    J Agric Food Chem 60:10375-97. 2012
    ....
  35. doi request reprint Natural products as sources for new pesticides
    Charles L Cantrell
    Natural Products Utilization Research Unit, Agricultural Research Service, United States Department of Agriculture, University, Mississippi 38677, USA
    J Nat Prod 75:1231-42. 2012
    ..3% of all NAI registrations...
  36. doi request reprint Glyphosate degradation in glyphosate-resistant and -susceptible crops and weeds
    Stephen O Duke
    NPURU, ARS, U S Department of Agriculture, P O Box 8048, University, Mississippi 38677, USA
    J Agric Food Chem 59:5835-41. 2011
    ..This is unexpected, considering the extreme selection pressure for evolution of glyphosate resistance in weeds and the difficulty in plants of evolving glyphosate resistance via other mechanisms...
  37. ncbi request reprint Phytotoxins from the leaves of Ruta graveolens
    Amber L Hale
    Department of Pharmacognosy, University of Mississippi, University, Mississippi 38677, USA
    J Agric Food Chem 52:3345-9. 2004
    ..None of the compounds caused significant cellular leakage of Cucumis sativus (cucumber) cotyledon disks at 100 microM. All three compounds inhibit plant growth, at least partially through inhibition of cell division...
  38. ncbi request reprint Antifungal activity of thiophenes from Echinops ritro
    Nikolas Fokialakis
    Natural Products Utilization Research Unit, Agricultural Research Service, U S Department of Agriculture, P O Box 8048, University of Mississippi, University, Mississippi 38677, USA
    J Agric Food Chem 54:1651-5. 2006
    ..oxysporum, P. viticola, and P. obscurans...
  39. ncbi request reprint Weeding with transgenes
    Stephen O Duke
    United States Department of Agriculture, Agricultural Research Service, Natural Products Utilization Research Unit, National Center for Natural Products Research, P O Box 8048, University, MS 38677, USA
    Trends Biotechnol 21:192-5. 2003
    ..Failsafe risk mitigation technologies are needed for most of these strategies...
  40. doi request reprint Rationale for a natural products approach to herbicide discovery
    Franck E Dayan
    United States Department of Agriculture, Agricultural Research Service, University, MS 38677, USA
    Pest Manag Sci 68:519-28. 2012
    ....
  41. ncbi request reprint United States Department of Agriculture-Agricultural Research Service research on natural products for pest management
    Stephen O Duke
    USDA, ARS, Natural Products Utilization Research Unit, PO Box 8048, University, MS 38677, USA
    Pest Manag Sci 59:708-17. 2003
    ..Gene expression profiles in response to fungicides and herbicides are being generated as tools to understand more fully the mode of action and to rapidly determine the molecular target site of new, natural fungicides and herbicides...
  42. ncbi request reprint Dose-response relationships between herbicides with different modes of action and growth of Lemna paucicostata: an improved ecotoxicological method
    Albrecht Michel
    US Department of Agriculture, Agricultural Research Service, Natural Products Utilization Research Unit, PO Box 8048, University, Mississippi 38677, USA
    Environ Toxicol Chem 23:1074-9. 2004
    ....
  43. ncbi request reprint Identification of mosquito biting deterrent constituents from the Indian folk remedy plant Jatropha curcas
    Charles L Cantrell
    USDA ARS, Natural Products Utilization Research Unit, University, MS 38677, USA
    J Med Entomol 48:836-45. 2011
    ..aegypti larvae up to 500 ppm. Oleic acid was the only fatty acid having larvicidal activity against 1-d-old Ae. aegypti larvae, with an LD50 of 47.9 ppm...
  44. ncbi request reprint Detoxification and transcriptome response in Arabidopsis seedlings exposed to the allelochemical benzoxazolin-2(3H)-one
    Scott R Baerson
    Agricultural Research Service, Natural Products Utilization Research Unit, United States Department of Agriculture, PO Box 8048, University, MS 38677, USA
    J Biol Chem 280:21867-81. 2005
    ..The data significantly expand upon previous studies examining plant transcriptional responses to allelochemicals and other environmental toxins and provide novel insights into xenobiotic detoxification mechanisms in plants...
  45. doi request reprint Comparing conventional and biotechnology-based pest management
    Stephen O Duke
    Natural Products Utilization Research Unit, Agricultural Research Service, U S Department of Agriculture, University, Mississippi 38677, USA
    J Agric Food Chem 59:5793-8. 2011
    ..These products will offer opportunities for the kind of pest management diversity that is more sustainable than that provided by the first generation of transgenic crops...
  46. pmc Correction: duke, s.o., et Al., modes of action of microbially-produced phytotoxins. Toxins 2011, 3, 1038-1064
    Stephen O Duke
    United States Department of Agriculture, Agricultural Research Service, Natural Products Utilization Research Unit, P O Box 8048, MS 38677, USA
    Toxins (Basel) 4:955. 2012
    ..The authors are sorry to report that the structure of rhizobitoxine in Figure 2 in their published paper [1] was incorrect...
  47. doi request reprint Why have no new herbicide modes of action appeared in recent years?
    Stephen O Duke
    Agricultural Research Service, Natural Products Utilization Research Unit, United States Department of Agriculture, University of Mississippi, Oxford, MS, USA
    Pest Manag Sci 68:505-12. 2012
    ..The economic stimulus to the herbicide industry caused by the evolution of herbicide-resistant weeds, especially GR weeds, may result in one or more new modes of action becoming available in the not too distant future...
  48. ncbi request reprint Isoflavone, glyphosate, and aminomethylphosphonic acid levels in seeds of glyphosate-treated, glyphosate-resistant soybean
    Stephen O Duke
    Natural Products Utilization Research Unit, Agricultural Research Service, U S Department of Agriculture, P O Box 8048, University, Mississippi 38677, USA
    J Agric Food Chem 51:340-4. 2003
    ..Intermediate levels were found in treatments 1 and 2. Low levels of glyphosate and AMPA were found in treatment 4 and a hand-weeded control, apparently due to herbicide drift...
  49. pmc The emergence of grass root chemical ecology
    Stephen O Duke
    Natural Products Utilization Research Unit, Agricultural Research Service, U S Department of Agriculture, University, MS 38677, USA
    Proc Natl Acad Sci U S A 104:16729-30. 2007
  50. ncbi request reprint Phytotoxicity and volatile constituents from leaves of Callicarpa japonica Thunb
    Mozaina Kobaisy
    Natural Products Utilization Research Unit, USDA ARS, Box 8048, University, MS 38677, USA
    Phytochemistry 61:37-40. 2002
    ..The oil of C. japonica was selectively phytotoxic to bentgrass compared to lettuce seeds, with 80-100% growth reduction observed at 0.3 mg/ml...
  51. ncbi request reprint The current status and environmental impacts of glyphosate-resistant crops: a review
    Antonio L Cerdeira
    Brazilian Department of Agriculture, Agricultural Research Service, Embrapa Environment, C P 69, Jaguariuna SP 13820 000, Brazil
    J Environ Qual 35:1633-58. 2006
    ..g., insect resistance), natural ecosystems could be affected. The development and use of failsafe introgression barriers in crops with such linked genes is needed...
  52. doi request reprint Glyphosate-resistant weeds and crops. Editorial
    Stephen O Duke
    Pest Manag Sci 64:317-8. 2008
  53. doi request reprint Glyphosate applied at low doses can stimulate plant growth
    Edivaldo D Velini
    Sao Paulo State University, Faculty of Agronomic Sciences, Experimental Station Lageado, Laboratory of Weed Science, Botucatu, SP, Brasil CEP 18603 970 PB 237, Brazil
    Pest Manag Sci 64:489-96. 2008
    ..Previous studies have reported that low doses of glyphosate stimulate growth, although these data are very limited. The objective of this study was to determine the effects of low glyphosate doses on growth of a range of plant species...
  54. ncbi request reprint The inhibitory activity of natural products on plant p-hydroxyphenylpyruvate dioxygenase
    Giovanni Meazza
    Isagro Ricerca Srl, via G Fauser, 4, 28100 Novara, Italy
    Phytochemistry 60:281-8. 2002
    ....
  55. doi request reprint Aminomethylphosphonic acid accumulation in plant species treated with glyphosate
    Krishna N Reddy
    Southern Weed Science Research Unit, Agricultural Research Service, U S Department of Agriculture, P O Box 350, Stoneville, Mississippi 38776, USA
    J Agric Food Chem 56:2125-30. 2008
    ....
  56. ncbi request reprint Weeding with allelochemicals and allelopathy--a commentary
    Stephen O Duke
    Pest Manag Sci 63:307. 2007
  57. ncbi request reprint Aminomethylphosphonic acid, a metabolite of glyphosate, causes injury in glyphosate-treated, glyphosate-resistant soybean
    Krishna N Reddy
    Southern Weed Science Research Unit, Agricultural Research Service, U S Department of Agriculture, P O Box 350, Stoneville, Mississippi 38776, USA
    J Agric Food Chem 52:5139-43. 2004
    ..These results suggest that soybean injury to GR soybean from glyphosate is due to AMPA formed from glyphosate degradation...
  58. ncbi request reprint Natural products that have been used commercially as crop protection agents
    Leonard G Copping
    Crop Protection Consultant, Saxon Way, Saffron Walden CB11 4EG, UK
    Pest Manag Sci 63:524-54. 2007
    ..Plant growth regulators and semiochemicals have been excluded from the review, as have living organisms that exert their effects by the production of biologically active secondary metabolites...
  59. ncbi request reprint Glyphosate-resistant and -susceptible soybean (Glycine max) and canola (Brassica napus) dose response and metabolism relationships with glyphosate
    Vijay K Nandula
    Delta Research and Extension Center, Mississippi State University, P O Box 197, Stoneville, Mississippi 38776, USA
    J Agric Food Chem 55:3540-5. 2007
    ..However, the AMPA from glyphosate breakdown could have been metabolized to nonphytotoxic metabolites before causing injury to GR canola. Injury in GR and non-GR canola from exogenous application of AMPA was similar...
  60. ncbi request reprint Tolerance and accumulation of shikimic acid in response to glyphosate applications in glyphosate-resistant and nonglyphosate-resistant cotton (Gossypium hirsutum L.)
    Wendy A Pline
    Department of Crop Science, Campus Box 7620, North Carolina State University, Raleigh, NC 27695 7620, USA
    J Agric Food Chem 50:506-12. 2002
    ..The increased sensitivity of reproductive structures to glyphosate inhibition may be due to a higher demand for shikimate pathway products and may provide an explanation for reports of fruit abortion from glyphosate-treated GR cotton...