Genomic and functional insights on Priestia megaterium MOD5IV: Enhancing Metal Phytoremediation Potential in Arid Environments.
Pouchucq L, Marcoleta AE, Becerra C, Bahamondes C, Lobos-Ruiz P
Phytoremediation
Heavy metals from mining and industry contaminate soils worldwide, and this naturally-occurring bacterium could help restore polluted land near your community using plants alone — no harsh chemicals required.
Researchers found a remarkable bacterium living in one of the world's harshest, most metal-polluted environments — the Atacama Desert. This microbe not only survives toxic levels of metals like lead, copper, and mercury, but it also actively helps plants grow better and pull those metals out of the soil. In lab tests, it supercharged a plant's ability to clean up contaminated ground, pointing toward a natural, low-cost way to restore polluted land.
Key Findings
The bacterium MOD5IV carries resistance genes for six heavy metals (copper, cadmium, lead, mercury, zinc, and cobalt) within a large genome of over 6,000 genes across a 5.25 Mbp chromosome and nine plasmids.
MOD5IV demonstrated multiple plant-growth-promoting traits including phosphate solubilization, nitrogen fixation, siderophore production, and measurable growth promotion in Arabidopsis thaliana lab plants.
When paired with tara (Caesalpinia spinosa) in laboratory trials, MOD5IV significantly enhanced the plant's ability to extract and tolerate heavy metals from contaminated soil.
chevron_right Technical Summary
Scientists discovered a bacterium from Chile's Atacama Desert that both helps plants grow and resists toxic metals, making it a powerful tool for cleaning contaminated soils using plants.
Abstract Preview
Metal contamination poses a global threat due to its widespread occurrence and high toxicity. Phytoremediation constitutes a preferred, environmentally rational approach for soil bioremediation. Th...
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