Used in plant physiology and molecular biology research to detect and quantify the activity of plant demagnesium chlorophyll a monooxygenase (PAO), an enzyme involved in chlorophyll degradation. The ELISA kit enables researchers to monitor PAO levels during senescence, stress responses, and photosynthetic remodeling in plant tissues. It is widely applied in studies related to leaf aging, abiotic stress tolerance, and crop productivity optimization. The assay provides high sensitivity and specificity, making it suitable for high-throughput screening in agricultural and environmental research.