Sublethal and Species-Dependent Phytotoxic Effects of Elutriate from Landfill-mined-soil-like-fractions Evaluated by Seed Bioassays
DOI:
https://doi.org/10.5132/eec.2026.01.09Keywords:
sublethal phytotoxicity, Hormesis, root growth, germinationAbstract
Landfill-mined-soil-like-fractions (LFMSF) derived from landfill mining processes, presents potential for environmental reuse but requires ecotoxicological assessment of its biological effects. This study evaluated the phytotoxicity of the LFMSF elutriate (E- LFMSF) through seed bioassays using Allium cepa, Solanum lycopersicum, and Eruca sativa, considering germination and root elongation as biological parameters. Germination did not differ significantly from the control (p > 0.05) for any species. However, root elongation showed significant differences among concentrations (p < 0.05), revealing sublethal and species-dependent effects. A. cepa and E. sativa exhibited a hormetic-like response pattern, characterized by stimulation at low to intermediate concentrations followed by reduction at higher levels. S. lycopersicum showed a predominantly inhibitory response at higher concentrations, classified as low to moderate toxicity. These findings demonstrate that E- LFMSF induces sublethal and species-dependent phytotoxic effects, highlighting the importance of multi-species approaches and root elongation as a sensitive indicator for evaluating residual materials intended for environmental application.
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