Bioaccumulation of Heavy Metals by Wild Plants Growing on Copper Mine Spoils in China

Characterization of Pseudomonas mendocina LR capable of removing nitrogen from various nitrogen-contaminated water samples when cultivated with Cyperus alternifolius L.

“…absorb heavy metals, which is consistent with our previous reports (42,43). Respiration of plant roots was found to reduce the concentration of dissolved oxygen in water and soil to facilitate the denitrification process as performed by anaerobic denitrifying bacteria without influencing the nitrogen reduction capacity of the aerobic denitrifiers.…”

Pedo and biogeochemical studies of mafic and ultramfic rocks in the Mingora and Kabal areas, Swat, Pakistan

“…However, the variable enrichment of Cr and Ni in the plant species, especially in I. gerardiana and S. griffihii grown on the soils derived from ultramafic rocks of the mélange zone in Mangora area can be applicable not only to mineral exploration but also to environmental and toxicological concerns. The Cr and Ni toxicity and their carcinogenic effects on both animals and human beings are well reported (Hernández and Pastor 2008; Xio et al 2008;Khan et al 2008).…”

“…Regression analysis was performed to identify the relationships between the metal concentrations in soil samples as well as in plant samples. The data indicated that these relationships were not strong, may be because of the different soil characteristics and plant physiologies (Khan et al 2008;Xio et al 2008). Linear regression analysis was used to examine the relationships between the concentrations in soils and plants (Fig.…”

“…Food chain contamination is one of the important pathways for the entry of HMs into the human body (Zhu et al 2004;Khan et al 2008). Previously, numerous studies have demonstrated that wild plant species have accumulated high concentrations of HMs, grown on contaminated sites (Del Río et al 2002;Del Río et al 2006;Mills et al 2006;Xio et al 2008;Hernández and Pastor 2008;Dwivedi et al 2008). However, more information are needed to identify the natural sources of HMs and their uptake by wild plants.…”

Overexpression of Elsholtzia haichowensis metallothionein 1 (EhMT1) in tobacco plants enhances copper tolerance and accumulation in root cytoplasm and decreases hydrogen peroxide production

“…Elsholtzia haichowensis Sun (Lamiaceae) is a Cu-accumulator that is widely distributed on Cu mining waste and Cu-contaminated soil along the middle and lower reaches of the Yangtze River in China [27,28]. The Cu tolerance of E. haichowensis was reported to be based on an exclusion mechanism [29,30].…”