Brassica rapa L. and Rapistrum rugosum L.: species of remedial capacity in saline soils contaminated with effluents with high environmental impact

FIASCONARO, MARÍA LAURA; ABRILE MARIANA GUADALUPE; OSORIO, JULIA; ORECCHIA, DAIANA SOLEDAD; DA SILVA JÚNIOR, F.M.R

Rosario

Conferencia; XXXIV Argentinian Meeting of Plant Physiology RAFV Conference 2023; 2023

Sociedad Argentina de Fisiología Vegetal

Biosolids derived from the treatment of leaching from sanitary landfills represent a significant environmental and management problem in these complexes. On the other hand, they contain nutrients and organic matter (OM) that could be useful as improvers of cover soils in the landfill itself, frequently low in OM. However, they can also contain significant amounts of pollutants such as heavy metals and, due to their composition, generate salinity in the soils where they are applied.Objetive of our study was to evaluate the remediation capacity of Brassica rapa L. and Rapistrum rugosum L. in a soil contaminated with sludge from a sanitary landfill and with a high salt content.The selected plant species were grown in pots and under greenhouse conditions. These species are spontaneous growth in the area. Before transplanting, both the commercial soil used and the sludge were characterized. For the development of the plants, two doses of mud were applied, 10% and 20% to the soil. The plants were harvested during the flowering stage. After harvest, specific determinations were made that indicate the physiological state of the studied plants: photosynthetic pigments, sugars and total proteins in leaves, and activity of antioxidant enzymes, such as catalase (CAT) and guaiac peroxidase (GPX). Likewise, we proceeded to collect data on fresh weights and subsequent dry weight of the harvested plants.The results obtained suggest that both species have remediation capacity and adaptation to saline soils contaminated with sludge. In B. rapa, growth (total dry weight) did not show differences between control plants and those grown in soil with mud; but in R. rugosum the mud provided the necessary nutrients for an increase in the dry mass of the plants. On the other hand, both species it was possible to observe that the sludge causes oxidative stress that is reflected in the increase in the activities of the antioxidant enzymes studied.