Lavandula angustifolia and microbial bioaugmentation synergistically reshape rhizosphere microbiome and enhance heavy metals removal in historically contaminated soils.
Cavone C, De Paola D, Naclerio G, Bucci A, Barra Caracciolo A
Phytoremediation
Contaminated lots near old industrial sites or roads could one day be cleaned up by planting lavender and inoculating the soil with the right bacteria — turning a toxic patch into a fragrant, working garden without excavation or chemicals.
Researchers grew lavender in soil loaded with heavy metals and added a cocktail of four beneficial bacteria to see if the combination could clean things up. The pairing worked far better than either the plant or the bacteria alone, pulling significantly more lead and tin out of the soil over three months. It also helped rebuild the underground community of microbes that keep soil healthy and functioning.
Key Findings
The combined plant + bacteria treatment removed 44.75% of lead and 66.87% of tin from historically contaminated soil over 90 days — the highest of all tested approaches.
Microbial community composition shifted significantly (PERMANOVA p = 0.001), with an increase in bacteria linked to metal detoxification, stress tolerance, and biofilm formation.
Functional prediction identified 7,959 metabolic functions in the combined treatment, with the highest redundancy in metal-handling pathways like efflux pumps and siderophore production — suggesting a resilient, self-reinforcing cleanup system.
chevron_right Technical Summary
Planting lavender in heavily polluted soil — then adding specific soil bacteria — removed up to 67% of tin and 45% of lead in just 90 days, outperforming either approach used alone. The plant-microbe partnership also rebuilt a healthier, more functional underground microbial community in the process.
Abstract Preview
Heavy metal contamination poses a serious threat to soil ecosystems and requires sustainable remediation approaches capable of restoring both chemical quality and microbial functionality. This stud...
open_in_new Read full abstractAbstract copyright held by the original publisher.
Species Mentioned
Was this useful?
Ancient DNA Reveals Pre-Columbian Amazonian Forest Management at Scale
Forests and fruits we romanticize as wild — including many plants now in our kitchens and gardens — may exist in their current abundance precisely because an...
Lavandula angustifolia, formerly L. officinalis, is a flowering plant in the family Lamiaceae, native to the Mediterranean basin. Its common names include lavender, true lavender and English lavender ; also garden lavender, common lavender and narrow-leaved lavender.