Used for the quantitative detection of OPR (12-oxophytodienoic acid reductase) enzyme activity in plant samples, this ELISA kit enables researchers to measure plant stress responses and jasmonic acid pathway activation. It is widely applied in plant physiology and molecular biology studies to investigate defense mechanisms against herbivores, pathogens, and environmental stresses such as drought or wounding. The kit supports high-throughput analysis in agricultural research and genetic engineering to evaluate transgenic plants with modified defense pathways.