, Volume 149, Issue 4, pp 553–560 | Cite as

Curling during desiccation protects the foliose lichen Lobaria pulmonaria against photoinhibition

  • Miloš Barták
  • Knut Asbjørn Solhaug
  • Hana Vráblíková
  • Yngvar Gauslaa


This study aims to assess the photoprotective potential of desiccation-induced curling in the light-susceptible old forest lichen Lobaria pulmonaria by using chlorophyll fluorescence imaging. Naturally curled thalli showed less photoinhibition-induced limitations in primary processes of photosynthesis than artificially flattened specimens during exposures to 450 μmol m−2 s−1 in the laboratory after both 12- (medium dose treatment) and 62-h duration (high dose treatment). Thallus areas shaded by curled lobes during light exposure showed unchanged values of measured chlorophyll fluorescence parameters (F V/F M, ΦPS II), whereas non-shaded parts of curled thalli, as well as the mean for the entire flattened thalli, showed photoinhibitory limitation after light treatments. Furthermore, the chlorophyll fluorescence imaging showed that the typical small-scale reticulated ridges on the upper side of L. pulmonaria caused a spatial, small-scale reduction in damage due to minor shading. Severe dry-state photoinhibition readily occurred in flattened and light-treated L. pulmonaria, although the mechanisms for such damage in a desiccated and inactive stage are not well known. Natural curling is one strategy to reduce the chance for serious photoinhibition in desiccated L. pulmonaria thalli during high light exposures.


Chlorophyll fluorescence imaging Lobaria pulmonaria Photoprotection Poikilohydric organisms 





High light dose


Medium light dose


Photosystem II


Quantum yield of photochemical reactions in photosystem II



The research was supported by the project No. 522/03/0754 provided by the Grant Agency of the Czech Republic.


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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • Miloš Barták
    • 1
  • Knut Asbjørn Solhaug
    • 2
  • Hana Vráblíková
    • 1
  • Yngvar Gauslaa
    • 2
  1. 1.Department of Plant Physiology and AnatomyMasaryk UniversityBrnoCzech Republic
  2. 2.Department of Ecology and Natural Resource Management (Urbygningen)Norwegian University of Life SciencesÅsNorway

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