Cytotoxicity of aluminum oxide nanoparticles on Allium cepa root tip--effects of oxidative stress generation and biouptake

Environmental Science and Pollution Research International
A RajeshwariAmitava Mukherjee

Abstract

The commercial usage of Al2O3 nanoparticles (Al2O3 NPs) has gone up significantly in the recent times, enhancing the risk of environmental contamination with these agents and their consequent adverse effects on living systems. The current study has been designed to evaluate the cytogenetic potential of Al2O3 NPs in Allium cepa (root tip cells) at a range of exposure concentrations (0.01, 0.1, 1, 10, and 100 μg/mL), their uptake/internalization profile, and the oxidative stress generated. We noted a dose-dependent decrease in the mitotic index (42 to 28 %) and an increase in the number of chromosomal aberrations. Various chromosomal aberrations, e.g. sticky, multipolar and laggard chromosomes, chromosomal breaks, and the formation of binucleate cells, were observed by optical, fluorescence, and confocal laser scanning microscopy. FT-IR analysis demonstrated the surface chemical interaction between the nanoparticles and root tip cells. The biouptake of Al2O3 in particulate form led to reactive oxygen species generation, which in turn probably contributed to the induction of chromosomal aberrations.

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Citations

Oct 17, 2016·Plant Physiology and Biochemistry : PPB·A RajeshwariAmitava Mukherjee
Jun 5, 2020·Environmental Science and Pollution Research International·Wei WangZhiwen Cui
Feb 8, 2019·Journal of Environmental Health Science & Engineering·Zahra Zendehboodi
May 21, 2020·IET Nanobiotechnology·Karthiga DurairajAmitava Mukherjee
Nov 11, 2020·Environmental Science and Pollution Research International·Iasmini Nicoli GalterE Silvia Tamie Matsumoto
Feb 3, 2021·Journal of Applied Toxicology : JAT·Lin Liu, Lu Kong
Mar 5, 2021·Naunyn-Schmiedeberg's Archives of Pharmacology·Nirmal SinghJaison Jeevanadam

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