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Silver nanoparticles induced reactive oxygen species via photosynthetic energy transport imbalance in an aquatic plant.
Nanotoxicology. 2017 03; 11(2):157-167.N

Abstract

The rapid growth in silver nanoparticles (AgNPs) commercialization has increased environmental exposure, including aquatic ecosystem. It has been reported that the AgNPs have damaging effects on photosynthesis and induce oxidative stress, but the toxic mechanism of AgNPs is still a matter of debate. In the present study, on the model aquatic higher plant Spirodela polyrhiza, we found that AgNPs affect photosynthesis and significantly inhibit Photosystem II (PSII) maximum quantum yield (Fv/Fm) and effective quantum yield (ΦPSII). The changes of non-photochemical fluorescence quenching (NPQ), light-induced non-photochemical fluorescence quenching [Y(NPQ)] and non-light-induced non-photochemical fluorescence quenching [Y(NO)] showed that AgNPs inhibit the photo-protective capacity of PSII. AgNPs induce reactive oxygen species (ROS) that are mainly produced in the chloroplast. The activity of ribulose-1, 5-bisphosphate carboxylase-oxygenase (Rubisco) was also very sensitive to AgNPs. The internalized Ag, regardless of whether the exposure was Ag+ or AgNPs had the same capacity to generate ROS. Our results support the hypothesis that intra-cellular AgNP dissociate into high toxic Ag+. Rubisco inhibition leads to slowing down of CO2 assimilation. Consequently, the solar energy consumption decreases and then the excess excitation energy promotes ROS generation in chloroplast.

Authors+Show Affiliations

a Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences , Wuhan , China. b University of Chinese Academy of Sciences , Beijing , China. c BIP UMR 7281, Aix Marseille Univ CNRS , 31 Chemin Joseph Aiguier, Marseille Cedex 20, Marseille, France.d Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, Hainan University , Haikou , China.e College of Geosciences, China University of Petroleum , Beijing , China.a Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences , Wuhan , China. b University of Chinese Academy of Sciences , Beijing , China.a Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences , Wuhan , China. b University of Chinese Academy of Sciences , Beijing , China.a Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences , Wuhan , China.a Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences , Wuhan , China. b University of Chinese Academy of Sciences , Beijing , China.a Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences , Wuhan , China. f Hubei Key Laboratory of Wetland Evolution & Ecological Restoration, Wuhan Botanical Garden, Chinese Academy of Sciences , Wuhan , China.c BIP UMR 7281, Aix Marseille Univ CNRS , 31 Chemin Joseph Aiguier, Marseille Cedex 20, Marseille, France.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28044463

Citation

Jiang, Hong Sheng, et al. "Silver Nanoparticles Induced Reactive Oxygen Species Via Photosynthetic Energy Transport Imbalance in an Aquatic Plant." Nanotoxicology, vol. 11, no. 2, 2017, pp. 157-167.
Jiang HS, Yin LY, Ren NN, et al. Silver nanoparticles induced reactive oxygen species via photosynthetic energy transport imbalance in an aquatic plant. Nanotoxicology. 2017;11(2):157-167.
Jiang, H. S., Yin, L. Y., Ren, N. N., Zhao, S. T., Li, Z., Zhi, Y., Shao, H., Li, W., & Gontero, B. (2017). Silver nanoparticles induced reactive oxygen species via photosynthetic energy transport imbalance in an aquatic plant. Nanotoxicology, 11(2), 157-167. https://doi.org/10.1080/17435390.2017.1278802
Jiang HS, et al. Silver Nanoparticles Induced Reactive Oxygen Species Via Photosynthetic Energy Transport Imbalance in an Aquatic Plant. Nanotoxicology. 2017;11(2):157-167. PubMed PMID: 28044463.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Silver nanoparticles induced reactive oxygen species via photosynthetic energy transport imbalance in an aquatic plant. AU - Jiang,Hong Sheng, AU - Yin,Li Yan, AU - Ren,Na Na, AU - Zhao,Su Ting, AU - Li,Zhi, AU - Zhi,Yongwei, AU - Shao,Hui, AU - Li,Wei, AU - Gontero,Brigitte, Y1 - 2017/01/19/ PY - 2017/1/4/pubmed PY - 2017/6/27/medline PY - 2017/1/4/entrez KW - AgNPs KW - ROS KW - Rubisco KW - Spirodela polyrhiza KW - photosynthesis SP - 157 EP - 167 JF - Nanotoxicology JO - Nanotoxicology VL - 11 IS - 2 N2 - The rapid growth in silver nanoparticles (AgNPs) commercialization has increased environmental exposure, including aquatic ecosystem. It has been reported that the AgNPs have damaging effects on photosynthesis and induce oxidative stress, but the toxic mechanism of AgNPs is still a matter of debate. In the present study, on the model aquatic higher plant Spirodela polyrhiza, we found that AgNPs affect photosynthesis and significantly inhibit Photosystem II (PSII) maximum quantum yield (Fv/Fm) and effective quantum yield (ΦPSII). The changes of non-photochemical fluorescence quenching (NPQ), light-induced non-photochemical fluorescence quenching [Y(NPQ)] and non-light-induced non-photochemical fluorescence quenching [Y(NO)] showed that AgNPs inhibit the photo-protective capacity of PSII. AgNPs induce reactive oxygen species (ROS) that are mainly produced in the chloroplast. The activity of ribulose-1, 5-bisphosphate carboxylase-oxygenase (Rubisco) was also very sensitive to AgNPs. The internalized Ag, regardless of whether the exposure was Ag+ or AgNPs had the same capacity to generate ROS. Our results support the hypothesis that intra-cellular AgNP dissociate into high toxic Ag+. Rubisco inhibition leads to slowing down of CO2 assimilation. Consequently, the solar energy consumption decreases and then the excess excitation energy promotes ROS generation in chloroplast. SN - 1743-5404 UR - https://www.unboundmedicine.com/medline/citation/28044463/Silver_nanoparticles_induced_reactive_oxygen_species_via_photosynthetic_energy_transport_imbalance_in_an_aquatic_plant_ L2 - https://www.tandfonline.com/doi/full/10.1080/17435390.2017.1278802 DB - PRIME DP - Unbound Medicine ER -