Furthermore, Zn toxicity
may negatively affect membrane permeability, the electron transport
chain (DeMagalhães et al., 2004), and nutrient uptake and translocation
(Jiang andWang, 2008;Wang et al., 2009). Asmentioned earlier for Cu,
Zn may also generate oxidative stress through its interference with the
plant's antioxidant defense system (Gratão et al., 2005).