Used to measure glutathione peroxidase (GSH-PX) enzyme activity in plant samples, this ELISA kit helps assess plant antioxidant capacity under stress conditions such as drought, salinity, heavy metals, or extreme temperatures. It enables researchers to evaluate oxidative stress levels by quantifying the enzyme responsible for reducing hydrogen peroxide and organic hydroperoxides, thus protecting plant cells from reactive oxygen species damage. Commonly applied in plant physiology, environmental stress studies, and crop breeding programs to screen stress-tolerant varieties. The assay is suitable for high-throughput analysis in agricultural research and environmental monitoring.