part_of part of part of characteristic of inheres in diterpene phytoalexin composition plant structure metabolite content trait phytoalexin content TO:0002669 Phytoalexins are antimicrobial compounds that plants produce on demand at sites of pathogen infection or stress to defend themselves. These substances vary in chemical structure, with examples including isoflavonoids in legumes like soybean, diterpenoids in rice, and sesquiterpenes in pepper plants. A metabolite content trait (TO:0000281) which is phytoalexin content in a plant structure (PO:0009011). plant_trait_ontology