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


Unal D., UYANIKGİL Y.

TURKISH JOURNAL OF BIOLOGY, cilt.35, ss.137-144, 2011 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 35 Konu: 2
  • Basım Tarihi: 2011
  • Doi Numarası: 10.3906/biy-0901-5
  • Dergi Adı: TURKISH JOURNAL OF BIOLOGY
  • Sayfa Sayıları: ss.137-144

Özet

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.