Isolation and characterisation of symbiotically effective Rhizobium resistant to arsenic and heavy metals after the toxic spill at the Aznalcóllar pyrite mine

By J. A. Carrasco, Patricia Armario, Eloísa Pajuelo, A. Burgos, Miguel A. Caviedes, R. López, M. Chamber, A. Palomares. 2005

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Recent Advances in Microbial Metal Bioaccumulation (2013, background): “Some reports have shown that indigenous microbes and plant-microbe symbionts tolerate high heavy metal concentrations and may play a prominent role in the restoration of contaminated soil (Carrasco et al., 2005; Delorme et al., 2003).”
Arsenic Toxicity: The Effects on Plant Metabolism (2012, background): “Moreover, alfalfa either grown in As-contaminated soil or exposed to AsIII had less than half of the total number of root nodules formed in the absence of added As (Carrasco et al., 2005; Pajuelo et al., 2008).”
Legume– Rhizobium Symbioses as a Tool for Bioremediation of Heavy Metal Polluted Soils (2011, background): “In this case, even though the number of nodules was reduced in the presence of heavy metals, the nodules formed on polluted soils were apparently normal and fixed about 75% N compared to those observed in nonpolluted soils (Carrasco et al. 2005).”