INVESTIGADORES
MENOYO Eugenia
congresos y reuniones científicas
Título:
ARBUSCULAR MYCORRHIZAL FUNGI AND DARK SEPTATE ENDOPHYTES OF METAL ACCUMULATOR PLANTS AFFECTED BY LEAD CONTAMINATED SOILS
Autor/es:
BECERRA A; MENOYO E; FAGLIONI V; CABELLO M; SALAZAR J
Reunión:
Congreso; XVII Congreso Argentino de Microbiología General; 2022
Resumen:
Córdoba, a big city with a large number of industrial plants in urban and suburban areas, is one of the most polluted zones in Argentina. In the locality of Bouwer (18 km from Córdoba city), there was a battery recycling company dedicated to the recovery of Pb from 1984 to mid-2005. This smelter was a source of Pb contamination in the surrounding soils and the population presented numerous cases of Pb poisoning. A promising alternative in ecological restoration of mining areas and remediation of polluted soils is the use of hyperaccumulator plants. Besides, understanding plant-microorganisms interactions is important in processes aimed at the remediation of heavy metals-contaminated64Página web SAMIGE: www.samige.org.arContacto: info@samige.org.arenvironments. In the present work, the occurrence of arbuscular mycorrhizal fungi (AMF-spores, indicator species, and root colonization) and dark septate endophytic fungi (DSE fungal root colonization) was investigated in three metal accumulator plant species (Sorghum halepense, Bidens pilosa, and Tagetes minuta) growing in soils with high Pb content. Soil samples were collected from the surroundings of an abandoned Pb smelting factory. Bulk soil surrounding plant root of the dominant plant species growing in Pb-polluted soils and in an uncontaminated site were selected. The three studied plants were colonized by AMF and DSE fungi. A total of 24 morphospecies were present in the Pb-contaminated areas. The AMF indicator species in the control site (non-contaminated area) was Funneliformis mosseae and in the most contaminated site were Gigaspora decipiens and Denticustata biornata. Pb soil contamination had a positive effect on AMF vesicle and spore number, and AMF spore and biomass plant accumulation, and a negative effect on AMF diversity and richness. Knowing the AMF species together with the vegetal community adapted to the extremely polluted environment is important for future soil restoration efforts.