Ethylene production by the lichen ramalina duriaei

Susan Lurie, Jacob Garty

Research output: Contribution to journalArticlepeer-review


The lichen Ramalina duriaei evolved ethylene when in a wetted state, the rate of ethylene evolution being constant for at least the first 20 h. Inhibitors of the ACC (I-aminocyclopropane-I-carboxylic acid) pathway did not inhibit ethylene production. Metal ions stimulated the production, with Fe2+ being the most effective. This stimulation was not affected by inhibitors of the ACC pathway but was inhibited by free radical scavengers such as propylgallate and quercitin. Endogenous ACC content was similar whether the lichens were producing ethylene at a basal rate or during Fe2+-stimulated ethylene formation. Malondialdehyde and aldehyde contents were higher in the presence of Fe2+. The results are discussed in terms of known pathways of ethylene production by micro-organisms.

Original languageEnglish
Pages (from-to)317-319
Number of pages3
JournalAnnals of Botany
Issue number4
StatePublished - Oct 1991


  • 2-oxo-methylthiobutyric acid
  • ACC
  • Ethylene
  • Metal ions
  • Methionine
  • Ramalina duriaei (De Not.) Bagl


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