Used in agricultural and plant biology research to measure levels of endogenous plant hormones such as auxins, gibberellins, cytokinins, abscisic acid, and ethylene. Helps scientists study plant growth, development, stress responses, and hormone regulation under various environmental conditions. Widely applied in experiments involving plant physiology, breeding programs, and crop improvement. Enables quantitative analysis of hormone changes during germination, flowering, fruiting, and in response to biotic or abiotic stresses like drought, salinity, or pathogen attack. Suitable for lab-based research in academia, biotechnology, and agrochemical industries.