Arabidopsis halleri is a plant species commonly used in plant research and genetic studies. It is a close relative of the model plant Arabidopsis thaliana, but is known for its ability to grow in metal-contaminated soils and its high tolerance to heavy metals such as zinc, cadmium, and nickel. Research on Arabidopsis halleri focuses on understanding the molecular mechanisms behind its metal tolerance, as well as its potential applications in phytoremediation and environmental cleanup. Additionally, Arabidopsis halleri is also used as a model plant to study evolutionary processes and adaptation to extreme environmental conditions.