Tire Wear Particles Inhibit Tomato Growth and Disrupt Rhizosphere Microbial Function.

Tire wear particles (TWPs), a widespread source of microplastic pollution, may pose ecological risks to terrestrial agroecosystems due to their persistence and chemical additives. However, their mechanisms in soil-plant systems remain poorly understood. A 30 day pot experiment investigated the effects of TWPs (100, 150, and 200 μm; 0.1 and 1%, w/w) on tomato (Solanum lycopersicum) growth, oxidative stress (MDA, H2O2, and O2-), soil enzymes (dehydrogenase, urease, and sucrase), and microbial communities. The smallest (100 μm) TWPs induced the strongest phytotoxicity (up to 55% biomass reduction, impaired photosynthesis, and elevated oxidative markers). High-dose (1%, w/w) 100 μm TWPs reduced soil nutrients and suppressed key enzyme activities. They also enriched stress-tolerant microbes (Actinobacteriota and Bacteroidota) while decreasing beneficial decomposers (Mortierella), disrupting microbial networks, and reducing modularity. Our findings highlight the particle-size-dependent toxicity of TWPs, which could adversely affect crop productivity and undermine soil ecosystem stability.

• Publication year

  2026

• Venue

  Journal of Agricultural and Food Chemistry

• Publication date

  2026-03-05

• Fields of study

  Medicine, Environmental Science

• Identifiers
  DOI 10.1021/acs.jafc.6c00598PMID 41784106
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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