The research, published in the Plant Biotechnology Journal, centers on the OsFeSOD3 gene, which encodes a chloroplast-localized iron superoxide dismutase. While this enzyme is known for neutralizing harmful reactive oxygen species (ROS) triggered by environmental stress, the team led by Professor Geupil Jang discovered an additional, critical role for the protein. It functions as a component of the plastid-encoded RNA polymerase complex, which is vital for chloroplast development and gene expression.

By coordinating these two functions, the plant manages to maintain photosynthetic capacity even when faced with water scarcity. Field trials conducted over two growing seasons confirmed that while overexpressing the gene boosted productivity, its absence led to severe developmental failures, including albino leaves and arrested growth. These findings suggest that OsFeSOD3 could break the traditional trade-off between stress tolerance and crop yield, offering a promising target for breeders working to secure food supplies against increasingly volatile climate conditions.