title: Activity Variation of Phanerochaete chrysosporium under Nanosilver Exposure by Controlling of Different Sulfide Sources.
abstract: Due to the particular activation and inhibition behavior of silver nanoparticles (AgNPs) on microbes at various concentrations, it's crucial to exploit the special concentration effect in environment. Here, we studied the viability variation of Phanerochaete chrysosporium (P. chrysosporium) under exposure to citrate-coated AgNPs (Citrate-AgNPs) in the presence of different sulfide sources (an inorganic sulfide, NaHS and an organic sulfide, thioacetamide (TAA)). The results indicated that both NaHS and TAA can promote activation of P. chrysosporium by Citrate-AgNPs at a higher concentration, which was initial at toxic level. Treatment with various concentrations of Citrate-AgNPs (0-9 mg/L) demonstrated a maximum activation concentration (MAC) at 3 mg/L. With the increase in sulfide concentration, MAC transferred to higher concentration significantly, indicating the obvious "toxicity to activation" transformation at a higher concentration. Ag(+) testing exhibited that variations in sulfide-induced Ag(+) concentration (3-7 μg/L Ag(+)) accounted for the "toxicity to activation" transformation. In addition, the similar results were observed on antibacterial application using Escherichia coli as the model species. Based on the research results, the application of this transformation in improving antibacterial activity was proposed. Therefore, the antibacterial activity of AgNPs can be controlled, even at concentration, via adjusting for the sulfide concentration.
authors: College of Environmental Science and Engineering, Hunan University, Changsha 410082, P.R. China.|Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, P.R. China.
authors: Zhi
authors: Z
authors: Guo
authors: College of Environmental Science and Engineering, Hunan University, Changsha 410082, P.R. China.|Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, P.R. China.
authors: Guiqiu
authors: G
authors: Chen
authors: College of Environmental Science and Engineering, Hunan University, Changsha 410082, P.R. China.|Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, P.R. China.
authors: Lingzhi
authors: L
authors: Liu
authors: College of Environmental Science and Engineering, Hunan University, Changsha 410082, P.R. China.|Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, P.R. China.
authors: Guangming
authors: G
authors: Zeng
authors: College of Environmental Science and Engineering, Hunan University, Changsha 410082, P.R. China.|Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, P.R. China.
authors: Zhenzhen
authors: Z
authors: Huang
authors: College of Resources and Environment, Hunan Agricultural University, Changsha 410128, P.R. China.
authors: Anwei
authors: A
authors: Chen
authors: College of Environmental Science and Engineering, Hunan University, Changsha 410082, P.R. China.|Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, P.R. China.
authors: Liang
authors: L
authors: Hu
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D019343:Citric Acid / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D004338:Drug Combinations; D004357:Drug Synergism; D004926:Escherichia coli / Q000187:drug effects / Q000254:growth & development; D053768:Metal Nanoparticles / Q000737:chemistry*; D020075:Phanerochaete / Q000187:drug effects* / Q000254:growth & development; D012834:Silver / Q000494:pharmacology*; D013440:Sulfides / Q000494:pharmacology*; D013853:Thioacetamide / Q000494:pharmacology*
chemical_list: D000900:Anti-Bacterial Agents; D004338:Drug Combinations; D013440:Sulfides; D013853:Thioacetamide; D019343:Citric Acid; D012834:Silver; C025451:sodium bisulfide