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The metallophyte Arabidopsis halleri thrives across an extremely broad edaphic range. Zn hyperaccumulation is found on soils differing in available Zn by up to six orders of magnitude, raising the question as to whether a common set of mechanisms confers this species‐wide ability. Elevated root concentrations of the metal chelator nicotianamine due to strong constitutive expression of AhNAS2 are important...
The molecular analysis of metal hyperaccumulation in species such as Arabidopsis halleri offers the chance to gain insights into metal homeostasis and into the evolution of adaptation to extreme habitats. A prerequisite of metal hyperaccumulation is metal hypertolerance. Genetic analysis of a backcross population derived from Arabidopsis lyrata × A. halleri crosses revealed three quantitative trait...
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