Integrated plant and rhizosphere response to gadolinium exposure in hydroponically grown tomato plants.
Giuliano F, Petta G, Terzaghi M, Tangredi DN, Guarino F
Soil Health
Wastewater from hospitals and imaging centers carries gadolinium into irrigation water sources, and this study shows it can quietly cripple the root microbes that help crops take up nutrients — long before you'd see anything wrong with the leaves.
Researchers grew tomato plants in water spiked with gadolinium — a metal released into rivers from MRI contrast dyes — and found the plants grew to less than half their normal size. The metal piled up in the roots rather than spreading to the rest of the plant, and the community of helpful microbes living around the roots was severely disrupted. This means gadolinium in irrigation water could harm crops and soil health in ways that aren't visible on the surface.
Key Findings
Gadolinium exposure reduced tomato leaf fresh weight by 60%, from 7.90 g in controls to 3.15 g in treated plants.
Gadolinium accumulated heavily in roots at 5.32 mg per gram of root tissue, with no detectable translocation to leaves or stems.
Rhizosphere microbial communities were severely disrupted — beneficial Burkholderiales bacteria declined to 42% of their normal presence in treated plants.
chevron_right Technical Summary
Gadolinium, a metal used in MRI contrast dyes that washes into waterways, stunts tomato growth and disrupts the root microbiome even when plants block it from reaching their leaves. This is one of the first studies to show how an emerging 'invisible' water contaminant affects both crop physiology and soil microbiology together.
Abstract Preview
Rare earth elements (REEs), comprising the lanthanides, scandium, and yttrium, are increasingly released into the environment due to anthropogenic activities but are not routinely monitored as conv...
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