Erratum to: Physiological basis of differential zinc and copper tolerance of Verbascum populations from metal-contaminated and uncontaminated areas.

摘要: Metal contamination represents a strong selective pressure favoring tolerant genotypes and leading to differentiation between plant populations. We investigated the adaptive capacity of early-colonizer species Verbascum recently exposed Zn- Cu-contaminated soils (10-20 years). Two thapsus L. populations from uncontaminated sites (NMET1, NMET2), one V. zinc-contaminated site (MET1), lychnitis population an open-cast copper mine (MET2) were elevated Zn or Cu in hydroponic culture under glasshouse conditions. MET showed considerably higher tolerance both than NMET as assessed by measurements growth net photosynthesis, yet they accumulated tissue concentrations shoot. Abscisic acid (ABA) concentration increased with treatment populations, which was correlated stomatal closure, decrease nutritional imbalance, indicative interference xylem loading divalent-cation homeostasis. At cellular level, sensitivity NMET2 reflected significant metal-induced ROS accumulation ion leakage roots well induction peroxidase activity (POD, EC 1.11.1.7), while had no effect on ABA POD MET1. Interestingly, MET2 constitutively root activity. propose that distribution shoots could represent mechanism for maintaining low levels unaffected conductance. The results show metal can occur after relatively short time exposure metal-contaminated soil, indicating their potential use phytostabilization.