Metal Interactions in the Ni Hyperaccumulating Population of Noccaea caerulescens Monte Prinzera

Author:

Fasani Elisa1,Zamboni Anita1ORCID,Sorio Daniela2,Furini Antonella1ORCID,DalCorso Giovanni1ORCID

Affiliation:

1. Department of Biotechnology, University of Verona, 37134 Verona, Italy

2. Centro Piattaforme Tecnologiche, University of Verona, 37134 Verona, Italy

Abstract

Hyperaccumulation is a fascinating trait displayed by a few plant species able to accumulate large amounts of metal ions in above-ground tissues without symptoms of toxicity. Noccaea caerulescens is a recognized model system to study metal hyperaccumulation and hypertolerance. A N. caerulescens population naturally growing on a serpentine soil in the Italian Apennine Mountains, Monte Prinzera, was chosen for the study here reported. Plants were grown hydroponically and treated with different metals, in excess or limiting concentrations. Accumulated metals were quantified in shoots and roots by means of ICP-MS. By real-time PCR analysis, the expression of metal transporters and Fe deficiency-regulated genes was compared in the shoots and roots of treated plants. N. caerulescens Monte Prinzera confirmed its ability to hypertolerate and hyperaccumulate Ni but not Zn. Moreover, excess Ni does not induce Fe deficiency as in Ni-sensitive species and instead competes with Fe translocation rather than its uptake.

Publisher

MDPI AG

Subject

General Agricultural and Biological Sciences,General Immunology and Microbiology,General Biochemistry, Genetics and Molecular Biology

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