The galactan sulphates of the conchocelis phases of Porphyra leucostricta and Bangia atropurpurea (rhodophyta)

Michael R. Gretz, Esther L. Mccandless, Jerome M. Aronson, Milton R. Sommerfeld

Research output: Contribution to journalArticle

31 Scopus citations


Galactan sulphates have been extracted from mechanically isolated cell walls of laboratory cultured conchocelis phases of Porphyra leucostricta and Bangia atropurpurea and their structure established by chemical methods and 13C-n.m.r. spectroscopy. The polysaccharides represent an extreme structure for porphyran-type polymers in that they consist almost entirely of 3-linked β-D-galactosyl residues alternating with 4-linked α-L-galactose-6-sulphate residues, the molar ratio of D to L units being approximately 1: 1. 13C-n.m.r. and gas-liquid and paper chromatography gave no indication of 6-O-methyl-D-galactose in these polymers. Conchocelis galactans are chemically distinct from porphyrans of generic phases of Porphyra and Bangia.

Original languageEnglish (US)
Pages (from-to)705-711
Number of pages7
JournalJournal of Experimental Botany
Issue number6
Publication statusPublished - Jun 1983



  • Cell walls
  • Galactans
  • Rhodophyta

ASJC Scopus subject areas

  • Statistics, Probability and Uncertainty
  • Applied Mathematics
  • Ecology
  • Ecology, Evolution, Behavior and Systematics
  • Physiology
  • Plant Science

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