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Nutritional value of duckweeds (Lemnaceae) as human food

Research output: Contribution to journalArticle

  • Klaus J. Appenroth
  • K. Sowjanya Sree
  • Volker Böhm
  • Simon Hammann
  • Walter Vetter
  • Matthias Leiterer
  • Gerhard Jahreis
Original languageEnglish
Pages (from-to)266-273
Number of pages8
JournalFood Chemistry
Volume217
DOIs
StatePublished - 15 Feb 2017

Abstract

Duckweeds have been consumed as human food since long. Species of the duckweed genera, Spirodela, Landoltia, Lemna, Wolffiella and Wolffia were analysed for protein, fat, and starch contents as well as their amino acid and fatty acid distribution. Protein content spanned from 20% to 35%, fat from 4% to 7%, and starch from 4% to 10% per dry weight. Interestingly, the amino acid distributions are close to the WHO recommendations, having e.g. 4.8% Lys, 2.7% Met + Cys, and 7.7% Phe + Tyr. The content of polyunsaturated fatty acids was between 48 and 71% and the high content of n3 fatty acids resulted in a favourable n6/n3 ratio of 0.5 or less. The phytosterol content in the fastest growing angiosperm, W. microscopica, was 50 mg g−1 lipid. However, the content of trace elements can be adjusted by cultivation conditions. Accordingly, W. hyalina and W. microscopica are recommended for human nutrition.

    Research areas

  • duckweed, Fatty acids, Landoltia, Lemna, Proteins, Spirodela, Wolffia, Wolffiella

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