title: Effect of a saprophytic fungus on the growth and the lead uptake, translocation and immobilization in Dodonaea viscosa.
abstract: Phytoremediation is a feasible alternative to remediate soils polluted with toxic elements, which can be enhanced by manipulating plant-microbe interactions. Regarding this, free-living saprophytic fungi that interact beneficially with roots have been scarcely studied. Thus, the aim of this study was to assess the effect of a saprophytic fungus, Lewia sp., on the plant growth and the ability of Dodonaea viscosa to phytoaccumulate or phytostabilize soluble and insoluble sources of lead in a solid support. The growth of D. viscosa was influenced by both Pb and Lewia sp. While seedlings exposed to Pb showed a decrease in biomass production, in seedlings grown without Pb the biomass was stimulated by Lewia sp. The fungus strongly stimulated the weight-to-length ratio in roots. Regardless of the treatment, D. viscosa accumulated 4.4-6.5 times more Pb in roots than in shoots, conducting to low translocation factors (< 0.2). The presence of Lewia sp. significantly improved Pb accumulation, achieving high bioconcentration factors (> 22), which was attributed to an increased bioavailability and uptake of Pb due to the fungus. This study demonstrated that Lewia sp. could improve Pb-phytostabilization by D. viscosa in soils polluted with soluble and insoluble forms of Pb.
authors.affiliation: Departamento de Biotecnología, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco, Col. Vicentina, Iztapalapa, México.
authors.forename: Cesar C
authors.initials: CC
authors.lastname: Rojas-Loria
authors.forename: Maria del Rosario
authors.initials: Mdel R
authors.lastname: Peralta-Perez
authors.forename: Leticia
authors.initials: L
authors.lastname: Buendia-Gonzalez
authors.forename: Tania L
authors.initials: TL
authors.lastname: Volke-Sepulveda
mesh_terms: D001203:Ascomycota / Q000502:physiology*; D001673:Biodegradation, Environmental; D001692:Biological Transport; D018533:Biomass; D007854:Lead / Q000032:analysis / Q000378:metabolism*; D018517:Plant Roots / Q000254:growth & development / Q000378:metabolism / Q000382:microbiology; D029631:Sapindaceae / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism / Q000382:microbiology*; D012987:Soil; D012989:Soil Pollutants / Q000378:metabolism*
chemical_list: D012987:Soil; D012989:Soil Pollutants; D007854:Lead