Used in plant biology research to quantify polyamine oxidase (PAO) enzyme levels in plant tissues. Helps study plant growth, development, and stress responses since PAO plays a key role in regulating polyamine metabolism. Widely applied in agricultural and physiological studies to understand how plants respond to environmental stresses such as drought, salinity, and pathogen attack. Enables researchers to measure changes in PAO activity under different experimental conditions, supporting advancements in crop improvement and stress tolerance strategies.