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Silver nanoparticles induced accumulation of reactive oxygen species and alteration of antioxidant systems in the aquatic plant Spirodela polyrhiza.
Environ Toxicol Chem. 2014 Jun; 33(6):1398-405.ET

Abstract

Silver nanoparticles (AgNPs) are widely used commercially because of their antibacterial properties. Oxidative stress is known to be involved in the toxicity of AgNPs to bacteria, animals, and algae. The authors used Spirodela polyrhiza to investigate whether AgNPs can induce oxidative stress in higher plants. Results showed that there was a dose-dependent increase in levels of reactive oxygen species, superoxide dismutase and peroxidase activity, and the antioxidant glutathione content in 6-nm AgNP treatments. Catalase activity and malondialdehyde content in 6-nm AgNP treatments was significantly higher than the control at silver concentrations of 5 mg L(-1) . Superoxide dismutase and catalase activity and antioxidant glutathione and malondialdehyde content were not significantly different at 10 mg L(-1) of AgNPs (6 nm and 20 nm). Treatment with 20 µg L(-1) Ag(+) (the amount almost equal to 10 mg L(-1) AgNPs released) did not change the reactive oxygen species level or antioxidant enzymes activity. Micron-sized Ag particles had no effect on S. polyrhiza. Transmission electron microscopy showed that, compared with the control, chloroplasts in S. polyrhiza treated with 6-nm and 20-nm AgNPs accumulated starch grains and had reduced intergranal thylakoids. These results clearly indicate that AgNPs are able to cause oxidative stress and affect the chloroplast structure and function of S. polyrhiza, and this effect was not caused by Ag(+) released from particles.

Authors+Show Affiliations

Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China; Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, Hainan University, HaiKou, China; University of Chinese Academy of Sciences, Beijing, China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24619507

Citation

Jiang, Hong-Sheng, et al. "Silver Nanoparticles Induced Accumulation of Reactive Oxygen Species and Alteration of Antioxidant Systems in the Aquatic Plant Spirodela Polyrhiza." Environmental Toxicology and Chemistry, vol. 33, no. 6, 2014, pp. 1398-405.
Jiang HS, Qiu XN, Li GB, et al. Silver nanoparticles induced accumulation of reactive oxygen species and alteration of antioxidant systems in the aquatic plant Spirodela polyrhiza. Environ Toxicol Chem. 2014;33(6):1398-405.
Jiang, H. S., Qiu, X. N., Li, G. B., Li, W., & Yin, L. Y. (2014). Silver nanoparticles induced accumulation of reactive oxygen species and alteration of antioxidant systems in the aquatic plant Spirodela polyrhiza. Environmental Toxicology and Chemistry, 33(6), 1398-405. https://doi.org/10.1002/etc.2577
Jiang HS, et al. Silver Nanoparticles Induced Accumulation of Reactive Oxygen Species and Alteration of Antioxidant Systems in the Aquatic Plant Spirodela Polyrhiza. Environ Toxicol Chem. 2014;33(6):1398-405. PubMed PMID: 24619507.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Silver nanoparticles induced accumulation of reactive oxygen species and alteration of antioxidant systems in the aquatic plant Spirodela polyrhiza. AU - Jiang,Hong-Sheng, AU - Qiu,Xiao-Ni, AU - Li,Gen-Bao, AU - Li,Wei, AU - Yin,Li-Yan, Y1 - 2014/04/16/ PY - 2013/07/24/received PY - 2013/09/18/revised PY - 2014/03/07/accepted PY - 2014/3/13/entrez PY - 2014/3/13/pubmed PY - 2014/9/23/medline KW - Aquatic plant KW - Nanotoxicology KW - Oxidative stress KW - Silver nanoparticles KW - Ultrastructure SP - 1398 EP - 405 JF - Environmental toxicology and chemistry JO - Environ Toxicol Chem VL - 33 IS - 6 N2 - Silver nanoparticles (AgNPs) are widely used commercially because of their antibacterial properties. Oxidative stress is known to be involved in the toxicity of AgNPs to bacteria, animals, and algae. The authors used Spirodela polyrhiza to investigate whether AgNPs can induce oxidative stress in higher plants. Results showed that there was a dose-dependent increase in levels of reactive oxygen species, superoxide dismutase and peroxidase activity, and the antioxidant glutathione content in 6-nm AgNP treatments. Catalase activity and malondialdehyde content in 6-nm AgNP treatments was significantly higher than the control at silver concentrations of 5 mg L(-1) . Superoxide dismutase and catalase activity and antioxidant glutathione and malondialdehyde content were not significantly different at 10 mg L(-1) of AgNPs (6 nm and 20 nm). Treatment with 20 µg L(-1) Ag(+) (the amount almost equal to 10 mg L(-1) AgNPs released) did not change the reactive oxygen species level or antioxidant enzymes activity. Micron-sized Ag particles had no effect on S. polyrhiza. Transmission electron microscopy showed that, compared with the control, chloroplasts in S. polyrhiza treated with 6-nm and 20-nm AgNPs accumulated starch grains and had reduced intergranal thylakoids. These results clearly indicate that AgNPs are able to cause oxidative stress and affect the chloroplast structure and function of S. polyrhiza, and this effect was not caused by Ag(+) released from particles. SN - 1552-8618 UR - https://www.unboundmedicine.com/medline/citation/24619507/Silver_nanoparticles_induced_accumulation_of_reactive_oxygen_species_and_alteration_of_antioxidant_systems_in_the_aquatic_plant_Spirodela_polyrhiza_ L2 - https://doi.org/10.1002/etc.2577 DB - PRIME DP - Unbound Medicine ER -