Silicon nanoparticles decrease arsenic translocation and mitigate phytotoxicity in tomato plants

Magín González-Moscoso, Antonio Juárez-Maldonado, Gregorio Cadenas-Pliego, Diana Meza-Figueroa, Bhaskar SenGupta, Nadia Martínez-Villegas

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, we simulate the irrigation of tomato plants with arsenic (As)-contaminated water (from 0 to 3.2 mg L-1) and investigate the effect of the application of silicon nanoparticle (Si NPs) in the form of silicon dioxide (0, 250, and 1000 mg L-1) on As uptake and stress. Arsenic concentrations were determined in substrate and plant tissue at three different stratums. Phytotoxicity, As accumulation and translocation, photosynthetic pigments, and antioxidant activity of enzymatic and non-enzymatic compounds were also determined. Our results show that irrigation of tomato plants with As-contaminated water caused As substrate enrichment and As bioaccumulation (roots > leaves > steam), showing that the higher the concentration in irrigation water, the farther As translocated through the different tomato stratums. Additionally, phytotoxicity was observed at low concentrations of As, while tomato yield increased at high concentrations of As. We found that application of Si NPs decreased As translocation, tomato yield, and root biomass. Increased production of photosynthetic pigments and improved enzymatic activity (CAT and APX) suggested tomato plant adaptation at high As concentrations in the presence of Si NPs. Our results reveal likely impacts of As and nanoparticles on tomato production in places where As in groundwater is common and might represent a risk.

Original languageEnglish
Pages (from-to)34147-34163
Number of pages17
JournalEnvironmental Science and Pollution Research
Volume29
Issue number23
Early online date16 Jan 2022
DOIs
Publication statusPublished - May 2022

Keywords

  • Antioxidant defense system
  • Bioaccumulation
  • Nanotechnology
  • Oxidative stress
  • Trace elements

ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution
  • Health, Toxicology and Mutagenesis

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