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Green AT, Schlensog M, Sancho LG, et al. The photobiont determines the pattern of photosynthetic activity within a single lichen thallus containing cyanobacterial and green algal sectors (photosymbiodeme). Oecologia. 2002;130(2):191-198doi: 10.1007/s004420100800.
Green, A. T., Schlensog, M., Sancho, L. G., Winkler, B. J., Broom, F. D., & Schroeter, B. (2002). The photobiont determines the pattern of photosynthetic activity within a single lichen thallus containing cyanobacterial and green algal sectors (photosymbiodeme). Oecologia, 130(2), 191-198. https://doi.org/10.1007/s004420100800
Green, Allan T, et al. "The photobiont determines the pattern of photosynthetic activity within a single lichen thallus containing cyanobacterial and green algal sectors (photosymbiodeme)." Oecologia vol. 130,2 (2002): 191-198. doi: https://doi.org/10.1007/s004420100800
Green AT, Schlensog M, Sancho LG, Winkler BJ, Broom FD, Schroeter B. The photobiont determines the pattern of photosynthetic activity within a single lichen thallus containing cyanobacterial and green algal sectors (photosymbiodeme). Oecologia. 2002 Jan;130(2):191-198. doi: 10.1007/s004420100800. Epub 2002 Jan 01. PMID: 28547141.
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Oecologia. 2002 Jan;130(2):191-198. doi: 10.1007/s004420100800. Epub 2002 Jan 01.

The photobiont determines the pattern of photosynthetic activity within a single lichen thallus containing cyanobacterial and green algal sectors (photosymbiodeme).

Oecologia

Allan T Green, Mark Schlensog, Leopoldo G Sancho, Barbro J Winkler, Fraser D Broom, Burkhard Schroeter

Affiliations

  1. Biological Sciences, Waikato University, Hamilton, New Zealand.
  2. Botanisches Institut, Universität Kiel, Olshausenstrasse 40, 24098, Kiel, Germany.
  3. Facultad de Farmacia, Depto. de Biologia Vegetal II, Universidad Complutense, Madrid, Spain.
  4. Institut für Polarökologie, Universität Kiel, Olshausenstrasse 40, 24098, Kiel, Germany.
  5. HortResearch, Private Bag 3123, Hamilton, New Zealand.

PMID: 28547141 DOI: 10.1007/s004420100800

Abstract

Photosystem activity status of the green algal (Pseudocyphellaria lividofusca) and cyanobacterial (P. knightii) components of a photosymbiodeme were continuously monitored in the field over a period of 35 days. The photosymbiodeme grew on a Nothofagus menziesii tree at Lake Waikaremoana, Urewera National Park, North Island, New Zealand. Two Mini-PAM fluorometers were placed so that the chlorophyll a fluorescence, temperature and PPFD (photosynthetically active photon flux density) could be recorded every 30 min for green algal and cyanobacterial parts of the thallus. Microclimate conditions were also recorded with a datalogger. The study confirmed the already known ability of green algal lichens to reactivate from high humidity alone whilst cyanobacterial species need liquid water, here obtained from rainfall. The photosystems of P. lividofusca were activated on every day and positive ETR (relative electron transport rate) occurred on all but 3 days. Activation level depended on the overnight relative humidity. P. knightii was activated and had positive ETR on only 13 days when rainfall had occurred. Both species were mostly inactive above 12°C but differed at low temperatures. P. knightii showed no activation at very low temperatures, -2 to 0°C, since these only occurred on clear, rain-free nights. PPFD was always very low, mostly below 80 µmol m

Keywords: Chlorophyll fluorescence; New Zealand; Phycosymbiodeme; Three-dimensional; Water relations

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