Used for detecting and quantifying plant defense-related enzyme activity in research and agricultural settings. Helps monitor plant stress responses and immune activation against pathogens. Widely applied in plant physiology studies, breeding programs, and evaluating the effectiveness of biocontrol agents or plant protection products. Enables high-throughput analysis of enzyme levels such as peroxidase, polyphenol oxidase, and β-1,3-glucanase involved in systemic acquired resistance.