Welcome To Website IAS

Hot news
Achievement

Independence Award

- First Rank - Second Rank - Third Rank

Labour Award

- First Rank - Second Rank -Third Rank

National Award

 - Study on food stuff for animal(2005)

 - Study on rice breeding for export and domestic consumption(2005)

VIFOTEC Award

- Hybrid Maize by Single Cross V2002 (2003)

- Tomato Grafting to Manage Ralstonia Disease(2005)

- Cassava variety KM140(2010)

Centres
Website links
Vietnamese calendar
Library
Visitors summary
 Curently online :  3
 Total visitors :  5071525

Titanium dioxide nanoparticles strongly impact soil microbial function by affecting archaeal nitrifiers.

Soils are facing new environmental stressors, such as titanium dioxide nanoparticles (TiO2-NPs). While these emerging pollutants are increasingly released into most ecosystems, including agricultural fields, their potential impacts on soil and its function remain to be investigated. Here we report the response of the microbial community of an agricultural soil exposed over 90 days to TiO2-NPs (1 and 500 mg kg-1 dry soil).

Simonin M, Richaume A, Guyonnet JP, Dubost A, Martins JM, Pommier T.

Sci Rep. 2016 Sep 23; 6:33643. doi: 10.1038/srep33643.

SOIL MICROBIOLOGY

Abstract

Soils are facing new environmental stressors, such as titanium dioxide nanoparticles (TiO2-NPs). While these emerging pollutants are increasingly released into most ecosystems, including agricultural fields, their potential impacts on soil and its function remain to be investigated. Here we report the response of the microbial community of an agricultural soil exposed over 90 days to TiO2-NPs (1 and 500 mg kg-1 dry soil). To assess their impact on soil function, we focused on the nitrogen cycle and measured nitrification and denitrification enzymatic activities and by quantifying specific representative genes (amoA for ammonia-oxidizers, nirK and nirS for denitrifiers). Additionally, diversity shifts were examined in bacteria, archaea, and the ammonia-oxidizing clades of each domain. With strong negative impacts on nitrification enzyme activities and the abundances of ammonia-oxidizing microorganism, TiO2-NPs triggered cascading negative effects on denitrification enzyme activity and a deep modification of the bacterial community structure after just 90 days of exposure to even the lowest, realistic concentration of NPs. These results appeal further research to assess how these emerging pollutants modify the soil health and broader ecosystem function.

 

See: https://www.ncbi.nlm.nih.gov/pubmed/27659196

 

Figure 5: Path analysis of the direct and indirect effects of TiO2-NPs, dominant 16S rDNA Nitrososphaera sequence number, AOA abundance, AOB abundance, nirK abundance on NEA and DEA.

Trở lại      In      Số lần xem: 1093

[ Tin tức liên quan ]___________________________________________________

 

Designed & Powered by WEBSO CO.,LTD