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Reports from Konkuk University Advance Knowledge in Oligopeptides (Assessment of silver nanoparticle-induced physiological and molecular changes in...

August 12, 2014



Reports from Konkuk University Advance Knowledge in Oligopeptides (Assessment of silver nanoparticle-induced physiological and molecular changes in Arabidopsis thaliana)

By a News Reporter-Staff News Editor at Life Science Weekly -- New research on Peptides is the subject of a report. According to news reporting originating from Seoul, South Korea, by NewsRx correspondents, research stated, "In this study, the effect of silver nanoparticles and silver ions on Arabidopsis thaliana was investigated at physiological and molecular levels. The seedlings were grown in sublethal concentrations of silver nanoparticles and silver ions (0.2, 0.5, and 1 mg/L) in 1/4 Hoagland's medium for 14 days under submerged hydroponic conditions."

Our news editors obtained a quote from the research from Konkuk University, "Significantly higher reduction in the total chlorophyll and increase in anthocyanin content were observed after exposure to 0.5 and 1 mg/L silver nanoparticles as compared to similar concentrations of silver ions. Lipid peroxidation increased significantly after exposure to 0.2, 0.5, and 1 mg/L of silver nanoparticles and 0.5 and 1 mg/L of silver ions. Qualitative analysis with dichloro-dihydro-fluorescein diacetate and rhodamine 123 fluorescence showed a dose-dependent increase in reactive oxygen species production and changes in mitochondrial membrane potential in the roots of seedlings exposed to different concentrations of silver nanoparticles. Real-time PCR analysis showed significant upregulation in the expression of sulfur assimilation, glutathione biosynthesis, glutathione S-transferase, and glutathione reductase genes upon exposure to silver nanoparticles as compared with silver ions."

According to the news editors, the research concluded: "Overall, based on the physiological and molecular level responses, it was observed that exposure to silver nanoparticles exerted more toxic response than silver ions in A. thaliana."

For more information on this research see: Assessment of silver nanoparticle-induced physiological and molecular changes in Arabidopsis thaliana. Environmental Science and Pollution Research, 2014;21(14):8858-8869. Environmental Science and Pollution Research can be contacted at: Springer Heidelberg, Tiergartenstrasse 17, D-69121 Heidelberg, Germany. (Springer - www.springer.com; Environmental Science and Pollution Research - www.springerlink.com/content/0944-1344/)

The news editors report that additional information may be obtained by contacting P.M.G. Nair, Konkuk University, Dept. of Appl Biosci, Coll Life & Environm Sci, Seoul 143701, South Korea (see also Peptides).

Keywords for this news article include: Asia, Seoul, South Korea, Glutathione, Nanoparticle, Oligopeptides, Nanotechnology, Emerging Technologies

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Life Science Weekly


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