Used to measure xanthine dehydrogenase (XDH) enzyme activity in plant samples, this ELISA kit helps researchers study plant metabolism, stress responses, and nitrogen utilization. It is commonly applied in agricultural research and plant physiology to evaluate how plants respond to environmental stresses such as drought, salinity, or pathogen attack. The kit enables high-throughput analysis, making it useful for screening plant varieties with improved stress tolerance or metabolic efficiency. Results support the development of resilient crops and provide insights into redox regulation and purine metabolism in plants.