The Interactions among the Heavy Metals in Soils and in Weeds and Their Antioxidant Capacity under the Mining Activities in Thai Nguyen Province, Vietnam

Abstract

In this study, the relationship between heavy metals (HMs) concentrations in soils and several weeds including Cyclosorus parasiticus, Dicranopteris linearis, Pityrogramma calomelanos, and Pteris vittata in three mining sites (Cam Gia (Thai Nguyen city), Tan Long (Dong Hy district), and Ha Thuong (Dai Tu district)) in Thai Nguyen province, Vietnam, have been investigated. The levels of HMs varied among soil origins and showed the contaminations of As, Cu, and Pb in soil samples collected in Dong Hy and Dai Tu districts. In addition, the HM distribution and cocontamination phenomena in different soils significantly affected the HM residues and transportation abilities into different species as well as tissues. Moreover, based on the analysis of bioaccumulation factor (BF) and translocation factor (TF), C. parasiticus and D. linearis were found potentially for phytoextraction by roots, while P. calomelanos and P. vittata were suitable for hyperaccumulation in shoots and leaves. Consequently, the strongest antioxidant property by 1,1-diphenyl-2-picrylhydrazyl (DPPH) and superoxide anion (SRSA) radical scavenging assays were demonstrated in the methanol root extracts of C. parasiticus and P. vittata, respectively. In conclusion, the correlation among HM in soils and tissues with antioxidant property allows us to hypothesize that the presence of these elements can enhance the antioxidant activity of plant extracts, suggesting to apply the weeds in phytoremediation as well as in phytomedicine.

Efflux Pump Inhibitors in Controlling Antibiotic Resistance: Outlook under a Heavy Metal Contamination Context

“…Moreover, P. vittata can grow and develop normally on Zn-contaminated soil because it can accumulate Zn in leaves up to 737 mg/kg. In Vietnam, P. vittata and some other ferns have been used to remedy metal-contaminated soil in the Thai Nguyen mine with plants [ 22 , 71 , 72 ]. In 1999, Singh et al reported that a decoction of Pteris vittata was effective in the treatment of dysentery [ 63 ].…”

“…In addition, some other studies have also described the composition of P. vittata , with glycosides of apigenin, luteolin, quercetin, kaempferol, leucocyanidin, and leucodelphinidin [ 65 ]. In the pharmacological field, several studies have shown that P. vittata has antioxidant, hypoglycemic, anti-inflammatory, antiplatelet, and anticancer activities [ 72 , 73 , 74 ]. Recently, Nguyen and coworkers revealed the mechanism of metal accumulation in P. vittata dominating the Thai Nguyen mining sites.…”

Development of a Pteris vittata L. compound database by widely targeted metabolomics profiling

“…In order to evaluate antioxidant properties of P. vittata aerial and subterranean parts, dry extracts of these above-mentioned plant samples were dissolved at 100 μg/mL by DMSO. The 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging assay followed our previously described method with ascorbic acid as positive control (Nguyen et al, 2020).…”