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| Titel |
Influence of CeO2 nanoparticles on growth and physiology of sorghum |
| VerfasserIn |
Linlin Mu, Wei-zhen Liang, Erin Kinsey, Bradley Rauh, Stephen Kresovich, Christophe Darnault |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250130782
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| Publikation (Nr.) |
 EGU/EGU2016-11087.pdf |
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| Zusammenfassung |
| Cerium oxide nanoparticles (CeO2 NPs) are commonly used as polishing agents for industry
and fuel additives to decrease the particulate matter emissions. CeO2 NPs may be
encountered in the soil and water environment through their life cycle or accidental releases,
and have potential phytotoxicity effects. Therefore, it is critical to assess the potential effects
of CeO2 NPs in soil on plant growth and physiology. The objective of this research is to
determine the physiological responses of three sorghums (Grassl, BtX623 and Rio)
to the effect of CeO2 nanoparticles in potting soil environment. Sorghums were
germinated and grown in potting soil in the greenhouse for three weeks cultivation with
treatments of 0, 100, 500, 1000 mg CeO2 NPs per kg soil. Plant parameters, such as
length, weight, and biomass of root and leaves were measured in each treatment
with 12 replications. After three weeks germination, the sorghum plants were dig
out and the roots were examined and scanned by the Silverfast SE Plus scanner to
compare and analyze their dimensions and shapes. To further study the growth and
physiological changes in plants due to the presence of CeO2 NPs in soil, one selected type
of sorghum (Grassl) was grown under the four different CeO2 NPs concentration
treatments for six months until plant maturity, and was also cut and harvested three
times to study CeO2 NPs effect on plant re-growth. At the end of each growing
period, above ground vegetative tissues were air-dried, grounded to 2mm particle size
and compositional traits were estimated by using near-infrared spectroscopy. The
influence of nanoparticles was observed on some of the plant traits. Preliminary results
showed the influence of CeO2 NPs on the roots growth, as Grassl and Btx623 in 100
mgkg−1 treatment grew significantly faster than other concentrations; however no
significant difference between control and 100 mgkg−1 treatment in Rio. CeO2
NPs concentration of 100 mgkg−1 had no impact on sorghum growth, compared
to the control treatment. Results of the six months growth and repetitive cutting
experiments indicated that the different treatments, including the presence and/or
concentrations of the nanoparticles, impacted some of the compositional traits of sorghum. |
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