TY - JOUR
T1 - Effects of silver sulfide nanomaterials on mycorrhizal colonization of tomato plants and soil microbial communities in biosolid-amended soil
AU - Judy, Jonathan D.
AU - Kirby, Jason K.
AU - Creamer, Courtney
AU - McLaughlin, Mike J.
AU - Fiebiger, Cathy
AU - Wright, Claire
AU - Cavagnaro, Timothy R.
AU - Bertsch, Paul M.
PY - 2015/11
Y1 - 2015/11
N2 - We investigated effects of Ag2S engineered nanomaterials (ENMs), polyvinylpyrrolidone (PVP) coated Ag ENMs (PVP-Ag), and Ag+ on arbuscular mycorrhizal fungi (AMF), their colonization of tomato (Solanum lycopersicum), and overall microbial community structure in biosolids-amended soil. Concentration-dependent uptake was measured in all treatments. Plants exposed to 100 mg kg-1 PVP-Ag ENMs and 100 mg kg-1 Ag+ exhibited reduced biomass and greatly reduced mycorrhizal colonization. Bacteria, actinomycetes and fungi were inhibited by all treatment classes, with the largest reductions measured in 100 mg kg-1 PVP-Ag ENMs and 100 mg kg-1 Ag+. Overall, Ag2S ENMs were less toxic to plants, less disruptive to plant-mycorrhizal symbiosis, and less inhibitory to the soil microbial community than PVP-Ag ENMs or Ag+. However, significant effects were observed at 1 mg kg-1 Ag2S ENMs, suggesting that the potential exists for microbial communities and the ecosystem services they provide to be disrupted by environmentally relevant concentrations of Ag2S ENMs.
AB - We investigated effects of Ag2S engineered nanomaterials (ENMs), polyvinylpyrrolidone (PVP) coated Ag ENMs (PVP-Ag), and Ag+ on arbuscular mycorrhizal fungi (AMF), their colonization of tomato (Solanum lycopersicum), and overall microbial community structure in biosolids-amended soil. Concentration-dependent uptake was measured in all treatments. Plants exposed to 100 mg kg-1 PVP-Ag ENMs and 100 mg kg-1 Ag+ exhibited reduced biomass and greatly reduced mycorrhizal colonization. Bacteria, actinomycetes and fungi were inhibited by all treatment classes, with the largest reductions measured in 100 mg kg-1 PVP-Ag ENMs and 100 mg kg-1 Ag+. Overall, Ag2S ENMs were less toxic to plants, less disruptive to plant-mycorrhizal symbiosis, and less inhibitory to the soil microbial community than PVP-Ag ENMs or Ag+. However, significant effects were observed at 1 mg kg-1 Ag2S ENMs, suggesting that the potential exists for microbial communities and the ecosystem services they provide to be disrupted by environmentally relevant concentrations of Ag2S ENMs.
KW - Nanoparticles
KW - Nanotechnology
KW - Nanotoxicology
UR - http://www.scopus.com/inward/record.url?scp=84937548486&partnerID=8YFLogxK
U2 - 10.1016/j.envpol.2015.07.002
DO - 10.1016/j.envpol.2015.07.002
M3 - Article
C2 - 26196315
AN - SCOPUS:84937548486
SN - 0269-7491
VL - 206
SP - 256
EP - 263
JO - Environmental Pollution
JF - Environmental Pollution
ER -