Photosynthetica

, 46:286

Irradiance prior to and during desiccation improves the tolerance to excess irradiance in the desiccated state of the old forest lichen Lobaria pulmonaria

  • J. Štepigová
  • Y. Gauslaa
  • H. Cempírková-Vráblíková
  • K. A. Solhaug
Brief Communication

DOI: 10.1007/s11099-008-0050-8

Cite this article as:
Štepigová, J., Gauslaa, Y., Cempírková-Vráblíková, H. et al. Photosynthetica (2008) 46: 286. doi:10.1007/s11099-008-0050-8

Abstract

Hydrated thalli of the lichen Lobaria pulmonaria were either preconditioned to dim irradiance (DI, 5 µmol m−2 s−1) or medium irradiance (MI, 200 µmol m−2 s−1) for 6 h. After this 6 h period, the thalli were allowed to desiccate under the two respective irradiances. Thereafter, these dry lichens were exposed to high irradiance (HI, 1 000 µmol m−2 s−1) for 60 h. After this HI treatment, the maximal photochemical quantum yield (FV/FM) and the de-epoxidation state of xanthophyll cycle pigments (DEPS) were highest in thalli preconditioned to MI. Hence irradiance in the last hydrated period before sampling is significant for the physiological state of lichens. A standardized irradiance pre-treatment before start of experiments is recommended.

Additional keywords

chlorophyll fluorescencephotosynthetic quenchingphotoinhibitionxanthophyll cycle

Copyright information

© Springer Science+Business Media, Inc. 2008

Authors and Affiliations

  • J. Štepigová
    • 1
  • Y. Gauslaa
    • 2
  • H. Cempírková-Vráblíková
    • 1
  • K. A. Solhaug
    • 2
  1. 1.Department of Plant Physiology and Anatomy, Institute of Experimental Biology, Faculty of ScienceMasaryk UniversityBrnoCzech Republic
  2. 2.Department of Ecology and Natural Resource ManagementNorwegian University of Life SciencesÅsNorway