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Elicitor-stimulated biosynthesis of hydroxycinnamoyltyramines in cell suspension cultures of Solanum tuberosum

Abstract.

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 4.3.1.5) and tyrosine decarboxylase (TyrDC; EC 4.1.1.25), exhibiting maximal activities 5–10 h after initiation of elicitor treatment. Activities of hydroxycinnamoyl-CoA:tyramine hydroxycinnamoyltransferase (EC 2.3.1.110), 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

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  • Key words: Cell culture
  • Elicitor
  • N-Hydroxycinnamoyltyramine
  • Phenylpropanoid metabolism
  • Phytophthora
  • Solanum