Christian O Dimkpa

Summary

Affiliation: Utah State University
Country: USA

Publications

  1. doi Antifungal activity of ZnO nanoparticles and their interactive effect with a biocontrol bacterium on growth antagonism of the plant pathogen Fusarium graminearum
    Christian O Dimkpa
    Department of Biology, Utah State University, Logan, UT, 84322 5305, USA
    Biometals 26:913-24. 2013
  2. doi Silver nanoparticles disrupt wheat (Triticum aestivum L.) growth in a sand matrix
    Christian O Dimkpa
    Department of Biology, Utah State University, Logan, Utah 84322, USA
    Environ Sci Technol 47:1082-90. 2013
  3. doi Fate of CuO and ZnO nano- and microparticles in the plant environment
    Christian O Dimkpa
    Department of Biology, Utah State University, Logan, Utah 84322, USA
    Environ Sci Technol 47:4734-42. 2013
  4. doi CuO and ZnO nanoparticles differently affect the secretion of fluorescent siderophores in the beneficial root colonizer, Pseudomonas chlororaphis O6
    Christian O Dimkpa
    Department of Biological Engineering, Utah State University, Logan, UT 84322, USA
    Nanotoxicology 6:635-42. 2012
  5. doi Nanospecific inhibition of pyoverdine siderophore production in Pseudomonas chlororaphis O6 by CuO nanoparticles
    Christian O Dimkpa
    Department of Biological Engineering, Utah State University, Logan, UT 84322, United States
    Chem Res Toxicol 25:1066-74. 2012
  6. pmc Production of indole-3-acetic acid via the indole-3-acetamide pathway in the plant-beneficial bacterium Pseudomonas chlororaphis O6 is inhibited by ZnO nanoparticles but enhanced by CuO nanoparticles
    Christian O Dimkpa
    Department of Biological Engineering, Utah State University, Logan, UT, USA
    Appl Environ Microbiol 78:1404-10. 2012
  7. doi Interaction of silver nanoparticles with an environmentally beneficial bacterium, Pseudomonas chlororaphis
    Christian O Dimkpa
    Department of Biological Engineering, Utah State University, Logan, UT 84322, USA
    J Hazard Mater 188:428-35. 2011
  8. doi Responses of a soil bacterium, Pseudomonas chlororaphis O6 to commercial metal oxide nanoparticles compared with responses to metal ions
    Christian O Dimkpa
    Department of Biological Engineering, Utah State University, Logan, UT 84322, USA
    Environ Pollut 159:1749-56. 2011
  9. doi Components from wheat roots modify the bioactivity of ZnO and CuO nanoparticles in a soil bacterium
    Nicole Martineau
    Department of Biology, Utah State University, Logan, UT 84322 5305, USA
    Environ Pollut 187:65-72. 2014
  10. doi Does doping with aluminum alter the effects of ZnO nanoparticles on the metabolism of soil pseudomonads?
    Tommy Fang
    Department of Biology, Utah State University, Logan, UT 84322 5305, United States
    Microbiol Res 168:91-8. 2013

Collaborators

  • Joan E McLean
  • Drew E Latta
  • Jixun Zhan
  • Jia Zeng
  • Anne J Anderson
  • David W Britt
  • Jean Luc Watson
  • Nicole Martineau
  • Tommy Fang
  • Jacob Stewart
  • Siddhartha Das
  • Alyssa J Calder
  • Mindy W Pabst
  • Trevor Hansen
  • Paul McManus
  • Astrid Jacobson
  • Jordan Goodman
  • William Johnson
  • Charles D Miller

Detail Information

Publications16

  1. doi Antifungal activity of ZnO nanoparticles and their interactive effect with a biocontrol bacterium on growth antagonism of the plant pathogen Fusarium graminearum
    Christian O Dimkpa
    Department of Biology, Utah State University, Logan, UT, 84322 5305, USA
    Biometals 26:913-24. 2013
    ....
  2. doi Silver nanoparticles disrupt wheat (Triticum aestivum L.) growth in a sand matrix
    Christian O Dimkpa
    Department of Biology, Utah State University, Logan, Utah 84322, USA
    Environ Sci Technol 47:1082-90. 2013
    ..Our findings demonstrate the potential effects of environmental contamination by Ag NPs on the metabolism and growth of food crops in a solid matrix...
  3. doi Fate of CuO and ZnO nano- and microparticles in the plant environment
    Christian O Dimkpa
    Department of Biology, Utah State University, Logan, Utah 84322, USA
    Environ Sci Technol 47:4734-42. 2013
    ..Factors from the sand and the plant modified the aggregation or dissolution of both types of particles, thus, influencing their environmental fates...
  4. doi CuO and ZnO nanoparticles differently affect the secretion of fluorescent siderophores in the beneficial root colonizer, Pseudomonas chlororaphis O6
    Christian O Dimkpa
    Department of Biological Engineering, Utah State University, Logan, UT 84322, USA
    Nanotoxicology 6:635-42. 2012
    ..Because siderophores are part of the chemical communication between soil microbes and plants, the outcomes of plant-microbe interactions could be affected by responses to NPs...
  5. doi Nanospecific inhibition of pyoverdine siderophore production in Pseudomonas chlororaphis O6 by CuO nanoparticles
    Christian O Dimkpa
    Department of Biological Engineering, Utah State University, Logan, UT 84322, United States
    Chem Res Toxicol 25:1066-74. 2012
    ....
  6. pmc Production of indole-3-acetic acid via the indole-3-acetamide pathway in the plant-beneficial bacterium Pseudomonas chlororaphis O6 is inhibited by ZnO nanoparticles but enhanced by CuO nanoparticles
    Christian O Dimkpa
    Department of Biological Engineering, Utah State University, Logan, UT, USA
    Appl Environ Microbiol 78:1404-10. 2012
    ..These findings raise the issue of whether sublethal doses of NPs would modify the beneficial effects of association between plants and bacteria...
  7. doi Interaction of silver nanoparticles with an environmentally beneficial bacterium, Pseudomonas chlororaphis
    Christian O Dimkpa
    Department of Biological Engineering, Utah State University, Logan, UT 84322, USA
    J Hazard Mater 188:428-35. 2011
    ..No evidence was found for loss of membrane integrity upon treatment with the NPs. Our findings indicate that growth of environmental bacteria could be impaired by Ag NPs, depending on the extent of EPS production...
  8. doi Responses of a soil bacterium, Pseudomonas chlororaphis O6 to commercial metal oxide nanoparticles compared with responses to metal ions
    Christian O Dimkpa
    Department of Biological Engineering, Utah State University, Logan, UT 84322, USA
    Environ Pollut 159:1749-56. 2011
    ..Accumulation of intracellular reactive oxygen species was correlated with CuO NPs lethality. Environmental deposition of NPs could create niches for ion release, with impacts on susceptible soil microbes...
  9. doi Components from wheat roots modify the bioactivity of ZnO and CuO nanoparticles in a soil bacterium
    Nicole Martineau
    Department of Biology, Utah State University, Logan, UT 84322 5305, USA
    Environ Pollut 187:65-72. 2014
    ..Imaging by atomic force microscopy suggested that root wash materials coated the NPs. We deduced that the response of a microbe to these metal oxide NPs could be negated by components released from roots. ..
  10. doi Does doping with aluminum alter the effects of ZnO nanoparticles on the metabolism of soil pseudomonads?
    Tommy Fang
    Department of Biology, Utah State University, Logan, UT 84322 5305, United States
    Microbiol Res 168:91-8. 2013
    ..These findings indicate that Al-doping of the ZnO NPs did not reduce the ability of the NPs to alter bacterial metabolism in ways that could influence performance of the pseudomonads in their soil environment...
  11. doi Effect of complexing ligands on the surface adsorption, internalization, and bioresponse of copper and cadmium in a soil bacterium, Pseudomonas putida
    Joan E McLean
    Utah Water Research Laboratory, Utah State University, 8200 Old Main Hill, Logan, UT 84322 8200, USA
    Chemosphere 91:374-82. 2013
    ..We also discuss the implications of these findings on interactions between soil and water organisms and nanoparticles that release metal ions...
  12. doi Soil components mitigate the antimicrobial effects of silver nanoparticles towards a beneficial soil bacterium, Pseudomonas chlororaphis O6
    Alyssa J Calder
    Department of Biological Engineering, Utah State University, Logan, UT 84322, USA
    Sci Total Environ 429:215-22. 2012
    ..We conclude that mitigation of toxicity of Ag NPs in soils towards a soil bacterium resides in several interactions that differentially involve protection from the Ag NPs or the ions they produce...
  13. doi The phytotoxicity of ZnO nanoparticles on wheat varies with soil properties
    Jean Luc Watson
    Department of Biology, Utah State University, Logan, UT, 84322 5305, USA
    Biometals 28:101-12. 2015
    ..These findings illustrate that formulations of ZnO NPs to be used as a soil amendment would need to be tuned to soil properties to avoid phytotoxicity yet provide increased Zn accumulations in the plant. ..
  14. doi Salts affect the interaction of ZnO or CuO nanoparticles with wheat
    Jacob Stewart
    Department of Biology, Utah State University, Logan, Utah, USA
    Environ Toxicol Chem 34:2116-25. 2015
    ..Thus, for both NPs, loading into plant tissues was not solely dependent on ion solubility. These findings indicated that salts in agricultural soils could modify the phytotoxicity of NPs...
  15. doi Nano-CuO and interaction with nano-ZnO or soil bacterium provide evidence for the interference of nanoparticles in metal nutrition of plants
    Christian O Dimkpa
    Department of Biology, Utah State University, Logan, UT, 84322, USA
    Ecotoxicology 24:119-29. 2015
    ..Our findings demonstrate that in addition to the apparent phytotoxic effects of NPs, NP exposure may also have subtle impacts on secondary processes such as metal nutrition. ..
  16. doi Defining the surface adsorption and internalization of copper and cadmium in a soil bacterium, Pseudomonas putida
    Mindy W Pabst
    Utah Water Research Laboratory, Utah State University, 8200 Old Main Hill, Logan, UT 84322 8200, USA
    Chemosphere 81:904-10. 2010
    ..Although potentiometric titration identified differences in site densities for proton binding to the two strains, these differences were not consistently displayed with Cu and Cd surface interactions...