Ultraviolet-absorbing scytonemin and mycosporine-like amino acid derivatives in exposed, rock-inhabiting cyanobacterial lichens

B. Büdel, U. Karsten, Ferran Garcia-Pichel

Research output: Contribution to journalArticle

95 Citations (Scopus)

Abstract

The occurrence of ultraviolet (UV)-absorbing substances like scytonemin and mycosporine-glycine is reported for the first time from cyanobacterial lichens of the genera Collema, Gonohymenia and Peltula, all coming from high-light-intensity habitats. Except for Collema with the filamentous Nostoc, all other cyanobionts belong to the unicellular genera Chroococcidiopsis, Cyanosarcina, Gloeocapsa or Myxosarcina. From transmission electron microscope studies it is evident that the pigmentation (scytonemin) is located extracellularly in the sheath of the outer thallus parts. Fluorescence microscopy and microprobe measurements clearly show UV radiation into the lichen thallus and hence the relevance of UV sunscreens for the protection of the organism.

Original languageEnglish (US)
Pages (from-to)165-172
Number of pages8
JournalOecologia
Volume112
Issue number2
DOIs
StatePublished - Oct 1997
Externally publishedYes

Fingerprint

Collema
amino acid derivatives
thallus
lichen
lichens
Peltula
Myxosarcina
Chroococcidiopsis
Gloeocapsa
amino acid
rocks
Nostoc
transmission electron microscopes
ultraviolet radiation
fluorescence microscopy
glycine (amino acid)
light intensity
rock
pigmentation
microscopy

Keywords

  • Cyanobacterial lichens
  • Mycosporine-glycine
  • Scytonemin
  • Sunscreens
  • Ultraviolet light

ASJC Scopus subject areas

  • Ecology

Cite this

Ultraviolet-absorbing scytonemin and mycosporine-like amino acid derivatives in exposed, rock-inhabiting cyanobacterial lichens. / Büdel, B.; Karsten, U.; Garcia-Pichel, Ferran.

In: Oecologia, Vol. 112, No. 2, 10.1997, p. 165-172.

Research output: Contribution to journalArticle

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