Influence of ZrO2, SiO2, Al2 O3 and TiO2 nanoparticles on maize seed germination under different growth conditions

The focus of this investigation is to evaluate the phytotoxicity of selected metal oxide nanoparticles and microparticles as a function of maize seed germination and root elongation under different growth conditions (Petri plate, cotton and soil). The results of seed germination and root elongation...

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Bibliographic Details
Published in:IET nanobiotechnology 2016-08, Vol.10 (4), p.171-177
Main Authors: Karunakaran, Gopalu, Suriyaprabha, Rangaraj, Rajendran, Venkatachalam, Kannan, Narayanasamy
Format: Article
Language:English
Subjects:
agricultural systems
Al2 O3
aluminium compounds
botany
cotton
environment systems
growth conditions
maize seed germination
metal oxide nanoparticles
microparticles
nanobiotechnology
nanoparticles
Petri plate
phytotoxicity
root elongation
silicon compounds
SiO2
soil
TiO2
titanium compounds
toxicology
X‐ray fluorescence spectrometry
zirconium compounds
ZrO2
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Summary:The focus of this investigation is to evaluate the phytotoxicity of selected metal oxide nanoparticles and microparticles as a function of maize seed germination and root elongation under different growth conditions (Petri plate, cotton and soil). The results of seed germination and root elongation experiments reveal that all the growth conditions show almost similar results. Alumina (Al2 O3) and titania (TiO2) nanoparticles significantly reduce the germination percentage, whereas silica (SiO2) nanoparticles and microparticles enhance the same. The results of nanoparticles and microparticles of zirconia (ZrO2) are found to be same as those of controls. Root elongation is enhanced by SiO2 nanoparticles and microparticles treatment, whereas inhibition is observed with Al2 O3 and TiO2 nanoparticles and microparticles. The X‐ray fluorescence spectrometry data of the treated and control seed samples show that seeds uptake SiO2 particles to a greater extent followed by TiO2, Al2 O3 and ZrO2. In addition, the uptake of nanoparticles is found to be greater than that of microparticles. Thus, the tested metal oxides penetrated seeds at the nanoscale as compared with the microscale. This study clarifies phytotoxicity of nanoparticles treated in different growth substrates and highlights the impact of nanoparticles on environment and agricultural systems.
ISSN:1751-875X
1751-8741
1751-875X
DOI:10.1049/iet-nbt.2015.0007