Project information
Photoinhibition and photoprotection in lichens under extreme conditions
- Project Identification
- GA522/03/0754
- Project Period
- 1/2003 - 12/2005
- Investor / Pogramme / Project type
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Czech Science Foundation
- Standard Projects
- MU Faculty or unit
- Faculty of Science
- Cooperating Organization
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Palacký University, Olomouc
- Responsible person prof. RNDr. Petr Ilík, Ph.D.
The aim is to enlarge recent knowledge on ecophysiology of lichens under extreme conditions, mainly at high and low temperature, different thallus hydration and high light. The project is focused on the analysis of photo protective mechanisms activatedin lichen thalli under high light. Those mechanism related to (1) hyphal cortex layer and exclusively to (2) photobiont will be studied separately. Measurements of changes in spectral reflectance with ongoing thalli dessication and determination ofamount and role of pigments and fungi secondary metabolits will be done. Photo protective mechanism related to photobiont will be studied using fluorometric and biochemical methods. We consider application of several fluorometric methods combined withevaluation of the amount of xanthophyll cycle pigments and antioxidants (glutathione reductase, superoxid dismutase) during high light stress induced under laboratory conditions.
Publications
Total number of publications: 28
2007
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Changes in spectral reflectance of a foliar lichen Umbilicaria hirsuta during desiccation
Biologia Plantarum, year: 2007, volume: 51, edition: 2
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Uptake, photosynthetic characteristics and membrane lipid peroxidation levels in the lichen photobiont Trebouxia erici exposed to copper and cadmium
The bryologist, year: 2007, volume: 110, edition: 1
2006
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A dip in the chlorophyll fluorescence induction at 0.22 s in Trebouxia-possessing lichens reflects a fast reoxidation of photosystem I. A comparison with higher plants
Biochimica et Biophysica Acta Bioenergetics, year: 2006, volume: 1757, edition: 1
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Annual variation in photoacclimation and photoprotection of the photobiont in the foliose lichen <i>Xanthoria parietina<i>
Journal of Photochemistry and Photobiology B: biology, year: 2006, volume: 83, edition: 2
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Antioxidative mechanisms in a lichen <i>Lasallia pustulata</i> exposed to light and dehydration stress. s
FESPB 2006 Congress: Book of Abstracts, year: 2006
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Curling during desiccation protects the foliose lichen Lobaria pulmonaria against photoinhibition.
Oecologia, year: 2006, volume: 149, edition: 4
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Photosynthesis of lichen symbiotic alga Trebouxia erici as affected by irradiance and osmotic stress
Biologia Plantarum, year: 2006, volume: 50, edition: 2
2005
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Acclimation of the photobiont and mycobiont partners in the foliose lichen Xanthoria parietina to seasonal changes in solar radiation
XVII International Botanical Congress - Abstracts, year: 2005
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Determination of temperature and light optima for photosynthetic activity and growth of green algal lichen photobionts of the genus Trebouxia
Book of abstracts, Photosynthesis and stress, year: 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