Project information
Limitation of photochemical and biochemical processes of photosynthesis of lichens under low temperature
- Project Identification
- GP206/03/P140
- Project Period
- 1/2003 - 12/2005
- Investor / Pogramme / Project type
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Czech Science Foundation
- Postdoctoral projects
- MU Faculty or unit
- Faculty of Science
- Keywords
- photosynthesis, lichens, stress, low temperature, cryoprotection
The proposed post-doc project fits the research of ecophysiology of lichens, which has been carried-out at the workplace of the proposer for last years. The proposed project will contribute to (1) the understanding of the ability of lichens to photosynthesize under very low temperatures (-20 to 5°C), (2) the evaluation of limits of physical and chemical conditions under which the chosen lichens (European and Antarctic foliose species) are able to fixation CO2 under very low temperatures and (3) the understanding of the fundamental physiological mechanisms involved in the photosynthesis of lichens under the conditions of exsiccation induced by osmotic stress. Lichens thalli will be exposed to very low temperatures, various levels of hydration, osmotic stress, irradiance as well as combination of these factors. The combination of several methods will be used for the evaluation of the lichen response, including simultaneous measurements of induced chlorophyll fluoresecence in vivo (photochemical reactions) and gasometric measurements (biochemical reactions). Some biochemical assays will be applied to determine photosynthetic pigments (HPLC: chlorophyll, carotene) as affected by experimental conditions. The gain of the proposed project will be also in the comparison of the interspecific variability in photosynthesis of the chosen lichen species under very low temperatures.
Publications
Total number of publications: 11
2009
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Photosynthetic electron transport at low temperatures in the green algal foliose lichens Lasallia pustulata and Umbilicaria hirsuta affected by manipulated levels of ribitol
Photosynthetica, year: 2009, volume: 47, edition: 2
2006
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Inhibition of photosynthetic processes in foliose lichens induced by temperature and osmotic stress.
Biologia Plantarum, year: 2006, volume: 50, edition: 4
2005
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Dynamics of xanthophyll cycle pigments in high light treated lichens
Plant Physiology Conference of PhD Students and Young Scientists, year: 2005
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Effect of polyols on photosynthetic response of foliose lichens to sub-zero temperature
XVII International Botanical Congress - Abstracts, year: 2005
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Method for the estimation of effective concentration of polyols in green algal lichens at low temperature.
Photosynthesis and Stress, Book of Abstracts, September 15-16, 2005, Brno, Czech Republic, year: 2005
2004
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Osmotic stress at low temperature in Umbilicaria hirsuta, Lasalia pustulata.
Book of Abstracts, 14th FESPB Congress, Krakow, Poland, Aug. 23-27, 2004. Acta Physiologiae Plantarum, year: 2004
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The role of ribitol in resistance of lichens to low temperature effects.
Book of Abstracts, 10th Days of Plant Physiology, Bratislava, Slovakia, Sept. 5-9, 2004, year: 2004
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Unusual step(s) in the fast chlorophyll fluorescence induction in lichens.
Acta Physiologiae Plantarum, year: 2004
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Visualization of high light effects on intrathalline variability of photosynthetic processes in hydrated <I>Lasallia pustulata</I>
Book of Abstracts. 5th IAL Symposium, year: 2004
2003
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Combined effect of NaCl and temperature on chlorophyll fluorescence parameters in Lasallia pustulata and Umbilicaria hirsuta
Book of Abstracts. Plant Physiology Conference of Ph.D. Students and Young Scientists, year: 2003