Used in biochemical and medical research to measure levels of L-ornithine synthetase activity in plant samples. Helps assess nitrogen metabolism and stress responses in plants. Enables researchers to study the role of ornithine in amino acid biosynthesis, polyamine production, and defense mechanisms under environmental stress such as drought, salinity, or pathogen attack. Supports development of improved crop varieties through metabolic pathway analysis. Suitable for high-throughput screening in agricultural biotechnology and plant physiology studies.