Research Commons
      • Browse 
        • Communities & Collections
        • Titles
        • Authors
        • By Issue Date
        • Subjects
        • Types
        • Series
      • Help 
        • About
        • Collection Policy
        • OA Mandate Guidelines
        • Guidelines FAQ
        • Contact Us
      • My Account 
        • Sign In
        • Register
      View Item 
      •   Research Commons
      • University of Waikato Research
      • Science and Engineering
      • Science and Engineering Papers
      • View Item
      •   Research Commons
      • University of Waikato Research
      • Science and Engineering
      • Science and Engineering Papers
      • View Item
      JavaScript is disabled for your browser. Some features of this site may not work without it.

      Ecophysiological adaptations of the lichen genera pseudocyphellaria and sticta to south temperate rainforests

      Green, T.G. Allan; Lange, Otto L.
      Thumbnail
      Files
      Green ecophysiological.pdf
      774.8Kb
      DOI
       10.1017/S0024282991000427
      Link
       journals.cambridge.org
      Find in your library  
      Citation
      Export citation
      Green, T. G. A., & Lange, O. L. (1991). Ecophysiological adaptations of the lichen genera pseudocyphellaria and sticta to south temperate rainforests. The Lichenologist, 23(03), 267-282.
      Permanent Research Commons link: https://hdl.handle.net/10289/943
      Abstract
      Temperate rainforests are a poorly researched habitat with respect to lichen ecophysiology in comparison to desert and polar regions. The evergreen, broadleaf forests provide a dim, moist environment that is relatively stable throughout the year. Lichens are abundant in both quantity and species diversity with the large foliose genera Sticta and Pseudocyphellaria normally being dominant, visually and in terms of biomass. These lichens exhibit a great diversity of both form and habitat range. Physiological and morphological adaptation has also been demonstrated. Pseudocyphellaria dissimilis shows changes in thallus water storage capacity with evaporative demand and is also highly shade-adapted. The species has the lowest light saturation and compensation values for photosynthesis yet known for lichens (20 and 1-μmol m−2s−1, PAR, respectively). Unexpectedly it is also highly desiccation-sensitive with some thalli being killed after only 20 h exposure to 15% relative humidity. Photobiont versatility is also a feature of these genera. Photosymbiodemes occur, i.e. a single thallus containing both green algal and cyanobacterial sectors. Because the different sectors have the same fungal partner and grow in the same habitat, it is possible to investigate whether particular physiological traits are photobiont determined. The ability to recover photosynthetic activity in humid air is confined to thalli with green algal photobionts whilst the inability of thalli containing cyanobacterial photobionts to tolerate high light stress may be related to their lack of a protective xanthophyll cycle.
      Date
      1991
      Type
      Journal Article
      Rights
      This article is published in the journal, The Lichenologist. Copyright © British Lichen Society 1991.
      Collections
      • Science and Engineering Papers [3084]
      Show full item record  

      Usage

      Downloads, last 12 months
      104
       
       
       

      Usage Statistics

      For this itemFor all of Research Commons

      The University of Waikato - Te Whare Wānanga o WaikatoFeedback and RequestsCopyright and Legal Statement