Researchers from Ewha Womans University have made a groundbreaking discovery in the field of phytoremediation with their study on the effects of a heavy-metal-tolerant bacterium, Leifsonia sp. ZP3, on plant growth in contaminated soils. The key findings from their research indicate significant improvements in the germination and growth of millet and mustard in soils with low concentrations of cadmium (Cd) and zinc (Zn), as well as in soils with higher levels of these toxic metals.
Leifsonia sp. ZP3, isolated from forest soil, demonstrated remarkable plant-growth-promoting activities, including hormone production, phosphate solubilization, and antioxidant properties. In soils with low Cd and Zn levels, ZP3 inoculation led to substantial increases in germination rates, shoot and root lengths, chlorophyll content, and seedling vigor index for both millet and mustard plants. Even in soils with higher metal concentrations, ZP3 inoculation resulted in improved plant growth, highlighting its potential for phytoremediation efforts.
Phytoremediation, a method that uses plants to remove contaminants from soil and water, is crucial for addressing environmental challenges posed by heavy-metal contamination. The use of plant-growth-promoting bacteria like Leifsonia sp. ZP3 can enhance the efficiency of phytoremediation by promoting plant growth and aiding in the uptake of toxic metals.
This research not only offers a promising solution for cleaning up contaminated soils but also contributes to sustainable agricultural practices. By harnessing the power of bacteria like ZP3, we can pave the way for a cleaner and healthier environment. The study, published on 17th June, 2024, provides valuable insights into the potential of PGPB in enhancing plant growth in heavy-metal-contaminated soils, opening new avenues for environmental remediation efforts.
