Pedological characteristics of Mn mine tailings and metal accumulation by native plants

Production of Indole-3-Acetic Acid via the Indole-3-Acetamide Pathway in the Plant-Beneficial Bacterium Pseudomonas chlororaphis O6 Is Inhibited by ZnO Nanoparticles but Enhanced by CuO Nanoparticles

“…The IAA levels produced by P. chlororaphis O6 with the various treatments (5 to 37 g/ml) were in the region that would boost rather than inhibit growth (3,4,24,32). The levels of Cu and Zn from the NPs used in testing the soil bacterium were relevant to levels reported for contaminated soils, ranging from 100 mg/kg to 1,000 mg/kg of Cu and 2,000 mg/kg of Zn; normal soils contain between 22 and 68 mg/kg Cu and 92 and 180 mg/kg Zn (14,33,38,39,41). At 200 mg of Cu/liter, the CuO NPs increased the conversion of trp to IAM in 15-h cultures and resulted in higher IAA levels in the culture medium by 48 h than in control cultures.…”

Soil and plant contamination by lead mining in Bellmunt (Western Mediterranean Area)

“…Soil pH affects not only metal availability, but also many processes of metal uptake by plants though this effect appears to be metal specific (Brown et al, 1995). Relatively small amounts of data on metal uptake by natural vegetation in neutral to alkaline soils with high metal burdens are available (CarrilloGonzález and González-Chávez, 2006;Conesa et al, 2006;Grodzinska et al, 2010;Poschenrieder et al, 2001;Szarek-Lukaszewska and Niklinska, 2002;Wang et al, 2008). This contrasts with the more widely described mine spoil sites where moderate to extreme acidity is an important factor influencing metal availability and phytotoxicity (Ernst, 1974;Rufo and de la Fuente, 2010).…”

Toxicity assessment of garden soils in the vicinity of mining areas in Southern Morocco

“…Their presence in traces amounts may adversely impact the biota [5,6]. They can be accumulated on plants via atmospheric deposition [7] and in plants [8], leading to potential serious health problems in humans and animals [5,9,10].…”