My doctoral thesis focuses on managing the antioxidant response of the metal hyperaccumulator plant Noccaea caerulescens against different abiotic stresses. A first approach aims to explore the phytoextraction efficiency and antioxidant behaviour of two populations (Ganges and Chavignée) when cultivated in a multi-contamination environment. These conditions involve the presence of trace metals in combination with high salinity, drought, or organic pollution. A second approach evaluates the effect of the foliar application of phytohormones on the phytoextraction of metals and stress alleviation. The effect on the latter is studied by monitoring the change in the components of the antioxidant system inside the tested plants.