ARBUSCULAR MYCORRHIZAL FUNGI ASSOCIATED TO LEAD ACCUMULATOR GRASS

MENOYO E; FLORES T; MEDERO M; SHORTREDE S; SALAZAR J; BECERRA A

Mendoza

Otro; XL Reunión Científica Anual de la Sociedad de Biología de Cuyo; 2022

Microorganisms-plants associations allow the establishment in harsh environments, including heavy metal contaminated areas. Thestudies with native organisms are very important in environmental remediation due to they were adapted to local conditions, formingspecific relationships that allowed to survive. The aim of this work was to study arbuscular mycorrhizal fungi (AMF) associated to therhizosphere of Jarava plumosa Jarava plumosa (Spreng.) S.W.L. Jacobs & J. Everett, native lead accumulator grass. The study area islocated in Bouwer, Córdoba, where the battery recycling factory is situated. The rhizospheric soil from J. plumosa was collected at 6sites with different lead soil content (Pb: 14-2938 μg.g-1). The AMF spores were extracted through the decantation, wet sieving andcentrifuged in sucrose gradient. The spore density was determined under a stereomicroscope as the number of spores/100 g of dry soil.Also, the relationship between AMF density and Pb concentration in plant tissue was analyzed. The presence of AMF were determinedin all study site, density varied from 130 to 1524 spore/100 g soil, differed according to lead soil content. Jarava plumosa accumulatedPb in stem and root, this accumulation was greater at the site with high Pb. Bioremediation reduce the toxic effect of environmentalpollutants through the use of plants and microorganisms. The application of this methodology is possible due to ability of some organismsto survive in contaminated soils. In environments highly contaminated with Pb, AMF-grass associations could allow the development ofthis plant community. Finally, highlight the importance of studies and applications of native species in restoration pract ices asdeterminant factor in local biodiversity reclamation.