Used to measure phenylalanine ammonia-lyase (PAL) enzyme activity in plant tissues, this ELISA kit helps researchers study plant defense mechanisms, stress responses, and phenylpropanoid metabolism. It is widely applied in agricultural research, plant physiology studies, and breeding programs to evaluate how plants respond to pathogens, UV exposure, and environmental stress. The assay enables high-throughput analysis, making it useful for screening plant varieties with enhanced resistance traits or improved secondary metabolite production.