. Developing a glyphosate-bioremediation strategy using plants and actinobacteria: Potential improvement of a riparian environment.

GUSTAVO C.M. GIACCIO; JULIANA M. SÁEZ; MARIA C. ESTÉVEZ; BARBARA SALINAS; RAÚL A. CORRAL; EDUARDO DE GERÓNIMO; VIRGINA APARICIO; ANALÍA ALVAREZ

JOURNAL OF HAZARDOUS MATERIALS.

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2023

0304-3894

Glyphosate (Gly) and its principal degradation product, the aminomethylphosphonic acid (AMPA) were found insoils from a riparian environment in Argentina. Sixty-five actinobacteria were isolated from these soils, rhizo-sphere, and plants (Festuca arundinacea and Salix fragilis). The isolate Streptomyces sp. S5 was selected to be usedas bioinoculant in a greenhouse test, in which plants, actinobacteria, and their combinations were assessed tobioremediate the riparian soil. The dissipation of both compounds were estimated. All treatments dissipatedsimilarly the Gly, reaching 87–92 % of dissipation. AMPA, dissipation of 38 % and 42 % were obtained by Salixand Festuca, respectively, while they increased to 57 % and 70 % when the actinobacterium was added to eachplanted system. Regarding the total dissipation, the higher efficiencies for both compounds were achieved by the non-planted soils bioaugmented with the actinobacterium, with 91 % of Gly dissipated and 56 % for AMPA.According to our study, it could be suggested which strategy could be applied depending on the bioremediationtype needed. If in situ bioremediation is necessary, the combination of phytoremediation and actinobacteriabioaugmentation could be convenient. On the other hand, if ex situ bioremediation is needed, the inoculation ofthe soil with an actinobacterium capable to dissipate Gly and AMPA could be the more efficient and easier alternative.