Show simple item record

dc.contributor.authorFu, Qing-Long
dc.contributor.authorZhong, Chun-Jie
dc.contributor.authorQing, Ting
dc.contributor.authorDu, Zi-Yan
dc.contributor.authorLi, Cheng-Cheng-
dc.contributor.authorFei, Jun-Jie
dc.contributor.authorPeijnenburg, Willie J G M
dc.date.accessioned2021-07-19T08:45:11Z
dc.date.available2021-07-19T08:45:11Z
dc.date.issued2021-05-18
dc.identifier.pmid34162100
dc.identifier.doi10.1016/j.chemosphere.2021.130863
dc.identifier.urihttp://hdl.handle.net/10029/625117
dc.description.abstractThe potential effects of extracellular polymeric substances (EPS) on the behavior and toxicity of silver nanoparticle (Ag-NPs) and silver sulfide nanoparticle (Ag2S-NPs) remains ambiguous. The interaction of EPS from Bacillus subtilis with Ag2S-NPs, metallic Ag-NPs, or ionic Ag, and the associated plant safety had been examined in this study. The biological impacts of Ag-NPs and Ag2S-NPs were Ag form-dependent and highly influenced by microbial EPS. Compared with metallic Ag-NPs, Ag2S-NPs exert inert biological impacts, as revealed by 3.44 times lower Ag bioaccumulation in wheat (Triticum aestivum L.) seedlings and nearly reduce plant biomass when wheat was subjected to 1.0 mg-Ag L-1 of Ag-NPs and Ag2S-NPs with the transfer factors of 151.56-930.87 vs. 12.52-131.81, respectively. These observations were coincident with the low dissolved Ag ([Ag]diss) in the Ag2S-NPs treatment than the Ag-NPs treatment (114.0 vs. 0.0791, μg L-1). Compared with the enhanced toxicity of Ag2S-NPs to wheat, Bacillus subtilis EPS significantly alleviate the phytotoxicity of Ag-NPs, as revealed by the relative root elongation (7.15-45.40% decrease vs. 2.39-11.75% increase), and malondialdehyde (1.47-83.22% increase vs. 8.57-25.25% decrease) and H2O2 (11.27-71.78% increase vs. 5.16-36.67% decrease) contents. These constrasting plant responses of B. subtilis EPS are mainly caused by their complexation property with toxic Ag+ and nutrient elements for wheat stressed by Ag-NPs and Ag2S-NPs, respectively. Our findings highlight the importance of rhizospheric EPS in affecting the biogeochemistry and ecotoxicity of metal nanoparticles including Ag-NPs and Ag2S-NPs in agricultural systems.en_US
dc.language.isoenen_US
dc.rightsCopyright © 2021 Elsevier Ltd. All rights reserved.
dc.subjectExtracellular polymeric substances (EPS)en_US
dc.subjectPhytotoxicityen_US
dc.subjectRhizosphereen_US
dc.subjectSilver nanoparticlesen_US
dc.titleEffects of extracellular polymeric substances on silver nanoparticle bioaccumulation and toxicity to Triticum aestivum L.en_US
dc.typeArticleen_US
dc.identifier.eissn1879-1298
dc.identifier.journalChemosphere 2021; 280:130863en_US
dc.source.journaltitleChemosphere
dc.source.volume280
dc.source.beginpage130863
dc.source.endpage
dc.source.countryEngland


Files in this item

Thumbnail
Name:
Publisher version

This item appears in the following Collection(s)

Show simple item record