Phytoaccumulators are plants that have the ability to absorb and concentrate specific heavy metals or other contaminants from the soil into their tissues. This process allows them to tolerate high levels of these substances, making them useful for phytoremediation to clean up contaminated environments. By absorbing pollutants, phytoaccumulators can help restore soil health and reduce the bioavailability of harmful substances in ecosystems. Examples include species like Indian mustard and sunflower, which are often used in remediation efforts.