Toxicity assessment of metal oxide nano-pollutants on tomato (Solanum lycopersicon): A study on growth dynamics and plant cell death

Environmental Pollution
Bilal AhmedJaved Musarrat

Abstract

The present study for the first time demonstrated the interactions of metal oxide (MO) nano-pollutants (CuO and Al2O3-NPs) with tissues and cellular DNA of tomato plants grown in soil sand: silt: clay (667:190:143) and Hoagland-hydroponic system and assessed the hazardous effects of NPs on cell physiology and biochemistry. Results of SEM equipped with EDX revealed attachment of variably shaped CuO-NPs (18 nm) and Al2O3-NPs (21 nm) on roots, and internalization followed by translocation in plants by ICP-MS and TEM. Significant variations in foliage surface area, chlorophyll, proteins, LPO, and antioxidant enzymes were recorded. Roots and shoots accumulated 225.8 ± 8.9 and 70.5 ± 4 μgAl g-1 DW, whereas Cu accumulation was 341.6 ± 14.3 (roots) and 146.9 ± 8.1 μg g-1 DW (shoots) which was significant (p ≤ 0.0005) as compared to control. The total soluble protein content in roots, shoots, and leaves collected from Al2O3-NPs treated plants increased by 120, 80, and 132%, respectively while in CuO-NPs treatments, the increase was 68 (roots), 36 (shoots), and 86% (leaves) over control. The level of antioxidant enzymes in plant tissues was significantly (p ≤ 0.05) higher at 2000 μg ml-1 of MONPs over control. A dose-dependent increase i...Continue Reading

Citations

Aug 2, 2020·Environmental Geochemistry and Health·Vishnu RajputSvetlana Sushkova
May 22, 2019·Environmental Geochemistry and Health·Vishnu RajputNatalia Barsova
Jun 5, 2020·Environmental Science and Pollution Research International·Wei WangZhiwen Cui
Jun 3, 2020·Journal of the Science of Food and Agriculture·Maria HayderLena Ruzik
Feb 13, 2021·Ecotoxicology and Environmental Safety·Fuad AmeenSaleh ALNadhari

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