Project information
Effects of low and freezing temperatures on photosynthesis in lichen symbiotic algae affected by ribitol
- Project Identification
- KJB601630808
- Project Period
- 1/2008 - 12/2010
- Investor / Pogramme / Project type
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Academy of Sciences of the Czech Republic
- The research grant projects for juniors
- MU Faculty or unit
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Faculty of Science
- doc. Mgr. Josef Hájek, Ph.D.
- Mgr. Hana Cempírková, Ph.D.
- Mgr. Jana Jílková
- Ing. Jaroslav Lang, Ph.D.
- Mgr. Peter Váczi, Ph.D.
- Mgr. Kristýna Večeřová, Ph.D.
- Keywords
- ribitol, polyols, freezing temperature, cryoprotection, lichens, lichen symbiotic algae, antioxidants, chlorophyll fluorescence
- Cooperating Organization
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Institute of Botany of the ASCR, v. v. i.
- Responsible person Mgr. Jana Kvíderová, Ph.D.
The aim of project is to enlarge the knowledge on the low temperature effects on lichen photosynthesis. The main aim is to quantify the effect of ribitol on low temperature resistance of photosynthesis in two lichen species (Lasallia pustulata and Umbilicaria hirsuta), fotobionts resp. The aim is to test a wide range of ribitol concentration (both natural and with an addition) to evaluate a positive effects on photosynthesis at low and subzero temperatures. For each experimental temperature, we will find a minimum physiological ribitol concentration with a positive effect both on potential (FV/FM) and actual (Φ,II) on primary photosynthetic processes, non-photochemical energy dissipation (NPQ, photoprotective pigment contents, antioxidants). The aim of the proposed project is also to address inter-specific differences in response to ribitol addition. Last but not least, the freezing temperature as dependent on actual ribitol content in the thallus will be determined.
Publications
Total number of publications: 17
2013
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The ice nucleation activity of extremophilic alga
CryoLetters, year: 2013, volume: 34, edition: (2)
2012
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Interspecific differences in cryoresistance of lichen symbiotic algae of genus Trebouxia assessed by cell viability and chlorophyll fluorescence.
Cryobiology, year: 2012, volume: 64, edition: 3, DOI
2010
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Effects of extrenally added ribitol on primary photosynthetic processes at low and freezing temperature in lichen thalli.
Year: 2010, type: Conference abstract
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Chlamydomonas nivalis, Chlamydomonas reinhardtii, Chloromonas nivalis, Trebouxia asymmetrica, Trebouxia erici, Trebouxia glomerata - soubor 6 multimediálních DVD
Year: 2010, type: R&D Presentation
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Mechanismy tolerance řas a lišejníků vůči extrémním faktorům prostředí: Detekce fyziologických procesů pomocí pokročilých biofyzikálních a biochemických metod
Year: 2010, type: Conference abstract
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Photosynthetic microorganisms in cold environments.
Year: 2010, type: Conference abstract
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Physiological processes in mosses and lichens in response to local climate: Case study from the James Ross Island, Antarctics
Year: 2010, type: Conference abstract
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The ice nucleation activity of green algae isolated from low-temperature environments
Year: 2010, type: Conference abstract
2009
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Cryoproective effects of ribitol on lichen photosynthetic processes.
In: M. Barták, J. Hájek, P. Váczi (eds.): Structure and Function of Antarctic Terrestrial Ecosystems. Book of Abstracts and Contributed Papers. Conference, Brno, October 22th-23th, 2009., year: 2009
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Cryoproective role of ribitol in Xanthoparmelia somloensis
BIOLOGIA PLANTARUM, year: 2009, volume: 53, edition: 4