Used to measure polyphenol oxidase (PPO) enzyme activity in plant tissues, this ELISA kit helps researchers study enzymatic browning, plant stress responses, and post-harvest quality in fruits, vegetables, and crops. It is widely applied in agricultural research, food science, and breeding programs to evaluate PPO levels, which are linked to shelf life and discoloration. The assay enables high-throughput analysis, making it useful for screening plant varieties with reduced browning traits or improved resistance to environmental stress.