Abstract
We investigated the individual and combined contributions of two distinct heme proteins namely, ascorbate peroxidase (APX) and catalase (CAT) on the tolerance of Lemna minor plants to antibiotics. For our investigation, we used specific inhibitors of these two H2O2-scavenging enzymes (p-aminophenol, 3-amino,1,2,4-triazole, and salicylic acid). APX activity was central for the tolerance of this aquatic plant to amoxicillin (AMX), whereas CAT activity was important for avoiding oxidative damage when exposed to ciprofloxacin (CIP). Both monitored enzymes had important roles in the tolerance of Lemna minor to erythromycin (ERY). The use of molecular kinetic approaches to detect and increase APX and/or CAT scavenging activities could enhance tolerance, and, therefore, improve the use of L. minor plants to reclaim antibiotics from water bodies.
Highlights
Academic Editor: Stanley OmayeEnvironmental contamination by antibiotics has grown to be a global concern
The plants were transferred to 250-milliliter Erlenmeyer flasks containing 100 mL of sterile Bold’s Basal medium (BBM) with appropriate concentrations of antibiotics and/or ascorbate peroxidase (APX) and CAT inhibitors
We have tested ascorbate peroxidase (APX) and catalase (CAT) and superoxide dismutase (SOD), which is closely metabolically connected with catalase [31]
Summary
Academic Editor: Stanley OmayeEnvironmental contamination by antibiotics has grown to be a global concern. In addition to the deleterious effects of antibiotics on the biota [1,2,3], their presence in environmental matrices contributes to the selection of resistant microbial species that constitute threats to global health [4]. The use of plants to reclaim antibiotics has emerged as a green technology in light of the inefficiency of physicochemical processes for removing antibiotics from the environment [5]. In this context, aquatic macrophytes have demonstrated positive performances in phytoremediation programs [5,6,7], their use is still limited by their tolerance to those contaminants. The elucidation of the complex mechanisms involved in plant tolerance to antibiotics could, contribute to the identification of suitable phytoremediator species, as well as improve their phytoremediation capacities [5].
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