Traumatin is a

plant hormone Plant hormone (or phytohormones) are signal molecules, produced within plants, that occur in extremely low concentrations. Plant hormones control all aspects of plant growth and development, from embryogenesis, the regulation of organ size, pa ...

produced in response to wound. Traumatin is a precursor to the related hormone

traumatic acid Traumatic acid is a monounsaturated dicarboxylic acid that occurs naturally in plants. The compound was first isolated from wounded bean plants by American chemists James English Jr. and James Frederick Bonner and Dutch scientist Arie Jan Haagen ...

References

Fatty aldehydes Fatty acids Plant hormones Aldehydic acids Carboxylic acids {{alkene-stub