Used in plant physiology and molecular biology research to quantify levels of 12-oxo-phytodienoic acid reductase (OPR), an enzyme involved in the jasmonic acid biosynthesis pathway. This ELISA kit enables researchers to monitor plant stress responses, defense mechanisms against herbivores and pathogens, and regulation of developmental processes such as root growth and senescence. It is particularly useful in studies related to plant hormone signaling, abiotic stress (e.g., drought, wounding), and genetic modification of crops for enhanced stress tolerance. The assay provides a sensitive and specific means to measure OPR protein concentration in plant tissue extracts, supporting high-throughput analysis in agricultural and environmental research.