Used to measure phenylalanine ammonia-lyase (PAL) enzyme activity in plant samples, this ELISA kit is essential in plant physiology and biochemistry research. It helps assess plant defense responses, as PAL is a key enzyme in the phenylpropanoid pathway that produces lignin, flavonoids, and phytoalexins. Researchers use it to study stress responses triggered by pathogens, UV radiation, or environmental factors. The kit enables high-throughput analysis in agriculture and plant breeding programs to evaluate plant resistance and health. It is also applied in studies of plant development and secondary metabolism.