Used in plant defense mechanisms, N-p-Coumaroyltyramine acts as a phytoalexin, helping protect plants against fungal and bacterial infections. It accumulates at infection sites, reinforcing cell walls and exhibiting antimicrobial activity. This compound is also involved in response to environmental stress, such as UV radiation and mechanical injury. In research, it serves as a biomarker for studying plant stress responses and defense signaling pathways. Its natural protective properties make it of interest for developing bio-based crop protection agents.