UV-B induces cell death in the lichen Physcia semipinnata (JFGmel)


Unal D., UYANIKGİL Y.

TURKISH JOURNAL OF BIOLOGY, vol.35, no.2, pp.137-144, 2011 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 35 Issue: 2
  • Publication Date: 2011
  • Doi Number: 10.3906/biy-0901-5
  • Title of Journal : TURKISH JOURNAL OF BIOLOGY
  • Page Numbers: pp.137-144

Abstract

We have examined the consequences of Ultraviolet-B (UV-B) irradiation in the thallus of the lichen Physcia semipinnata (J.F.Gmel) in terms of cell viability and apoptotic-like formation. UV-B induced oligonucleosomal DNA fragmentation was detected by TUNEL assay and this is the first study showing DNA fragmentation in thalli. The intensity of TUNEL-positive cells after exposure to UV-B at doses up to 95.9 J/cm(2) was higher in the photobiont layer than the mycobiont layer.