Betalains of Celosia argentea

Willibald Schliemann*, Yizhong Cai, Thomas Degenkolb, Jürgen Schmidt, Harold Corke

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

74 Scopus citations

Abstract

The betalains of yellow, orange and red inflorescences of common cockscomb (Celosia argentea var. cristata) were compared and proved to be qualitatively identical to those of feathered amaranth (Celosia argentea var. plumosa). In addition to the known compounds amaranthin and betalamic acid, the structures of three yellow pigments were elucidated to be immonium conjugates of betalamic acid with dopamine, 3-methoxytyramine and (S)-tryptophan by various spectroscopic techniques and comparison to synthesized reference compounds; the latter two are new to plants. Among the betacyanins occurring in yellow inflorescences in trace amounts, the presence of 2-descarboxy-betanidin, a dopamine-derived betacyanin, has been ascertained. The detection of high dopamine concentration may be of toxicological relevance in use of yellow inflorescences as a vegetable and in traditional Chinese medicine, common uses for the red inflorescences of common cockscomb.

Original languageEnglish
Pages (from-to)159-165
Number of pages7
JournalPhytochemistry
Volume58
Issue number1
DOIs
StatePublished - 10 Aug 2001
Externally publishedYes

Keywords

  • 3-Methoxytyramine
  • Amaranthaceae
  • Betalains
  • Betaxanthins
  • Celosia argentea var. cristata
  • Celosia argentea var. plumosa
  • Common cockscomb
  • Dopamine
  • Feathered amaranth
  • Miraxanthin V

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