Treatment of suspension-cultured potato cells (Solanum tuberosum L. cv. Desirée) with an elicitor from Phytophthora infestans induced increased incorporation of 4-hydroxybenzaldehyde, 4-hydroxybenzoate, and N-4-coumaroyl- and N-feruloyltyramine into the cell␣wall and secretion of N-4-coumaroyl- and N-feruloyltyramine into the culture medium. Induced metabolite accumulation was preceded by rapid and transient increases in activities of phenylalanine ammonia-lyase (EC 126.96.36.199) and tyrosine decarboxylase (TyrDC; EC 188.8.131.52), exhibiting maximal activities 5–10 h after initiation of elicitor treatment. Activities of hydroxycinnamoyl-CoA:tyramine hydroxycinnamoyltransferase (EC 184.108.40.206), catalyzing the formation of N-4-coumaroyl- and N-feruloyltyramine, increased later and remained at high levels. The phenolic defense compounds appear to be involved in cell wall reinforcement and may further directly affect fungal growth in the apoplastic space.
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Received: 26 July 1997 / Accepted: 9 September 1997
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Schmidt, A., Scheel, D. & Strack, D. Elicitor-stimulated biosynthesis of hydroxycinnamoyltyramines in cell suspension cultures of Solanum tuberosum . Planta 205, 51–55 (1998). https://doi.org/10.1007/s004250050295
- Key words: Cell culture
- Phenylpropanoid metabolism