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- Title
Investigating Impacts of Nanosized Titanium Dioxide (Nano-TiO<sub>2</sub>) on Maize (Zea mays L.) and Their Ensuing Implications on Soil Physiochemistry: a Soil Exposure Study.
- Authors
Bakshi, Mansi; Kumar, Shailender
- Abstract
The increasing usage and applications of nanosized titanium dioxide (nano-TiO2) can lead to its excessive environmental release. Soil system, particularly, agricultural soil is projected to be highly susceptible to this influx of nano-TiO2. This study investigated the impacts of nano-TiO2 on maize plants and the physiochemistry of the treated soil at exposure concentrations of 0, 100, 500, and 1000 mg/kg. The effect of nano-TiO2 on maize growth, photosynthetic activity, and biochemical response was assessed along with Ti uptake, and translocation in maize plants. Furthermore, impacts of nano-TiO2 on soil physiochemistry, soil microbial biomass and activity of soil enzymes dehydrogenase, urease, alkaline phosphatase, and β-glucosidase were also investigated. The plant growth, biomass, and photosynthetic activity was not affected by nano-TiO2 application in soil. At higher concentration, malondialdehyde (MDA) content in all plant organs was elevated (roots: +45%, shoots: +37%, and leaves: +25%) indicating oxidative stress. Maize plants exhibited higher Ti uptake by root but lower Ti translocation to shoots. PCA revealed that soil enzymatic activity and soil microbial biomass formed major clusters around control groups indicating variance from treated soil. In summary, we found no acute phytotoxicity to maize plants but induction of oxidative stress at 1000 mg/kg concentration of nano-TiO2. Furthermore, soil exposure to nano-TiO2 could impact soil biological functions and this needs further investigation.
- Subjects
TITANIUM dioxide; SOIL enzymology; SOILS; PLANT translocation; AGRICULTURE; CORN
- Publication
Water, Air & Soil Pollution, 2023, Vol 234, Issue 9, p1
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1007/s11270-023-06556-6