IntroductionSoil contamination is a global environmental problem. It is caused by hazardous solid or liquid substances, such as traces of toxic metals, mixing with natural soil. Contaminated areas are often those where mining activities take place or agricultural lands affected by the use of fertilizers containing metals. Mining and mineral processing in particular generate a large amount of by-product mining waste. These are collected in mining waste piles and tailings and can cause serious soil contamination through spillage. The recent incident at the Talvivaara mining site in Sotkamo, Finland, is an example where a major leak from a tailings dam caused severe soil contamination by releasing wastewater with high concentrations of nickel and zinc into the neighboring area. removal of heavy metal contaminants from soil. These include essential heavy metals such as Fe, Cu, Mn and Ni, those which are necessary for living organisms, and non-essential heavy metals such as Cd, Pb, As and Hg, which are not necessary for any function biochemical. Heavy metals are not biodegradable and accumulate in the environment. High concentrations of heavy metals beyond threshold limits pose high risks to the environment and human health. Besides mining, other anthropogenic sources of heavy metals include smelting, electroplating, use of pesticides and fertilizers in agriculture, industrial discharges, etc. If heavy metals enter the food chain through soil contamination, they can cause adverse health problems such as lead poisoning, kidney disorders. and brain damage. Over the past decades, there has been growing interest in the development of technologies for the remediation of contaminated soils. Middle of paper ......s such as chelators that provide essential nutrients and protection against plant pathogens. However, the main effect of these microbes is that their biological activities in the soil affect the speciation and mobility of metal ions, and therefore influence the tolerance and uptake of metals by plants [Whiting et al. 2001]. Studies have shown that certain microbes can increase the uptake of metals by plants [Robinsons et al. 2009]. For example Chopra et al. (2007) showed that microorganisms present in soil from an arsenic contamination site increased the uptake of Agrostis tenuis by 45%. The effectiveness of rhizoremediation is highly dependent on the plant's ability to support the growth of microbes and colonize the root region. This can happen naturally. Plant roots release complex aromatic compounds such as flavonoids into the rhizosphere, which help stimulate the growth and activity of degrading bacteria..