Detailed Information on Publication Record
2006
Glutathione and zeaxanthin formation during high light stress in foliose lichens
ŠTEPIGOVÁ, Jana, Hana VRÁBLÍKOVÁ, Jaroslav LANG, Kristýna VEČEŘOVÁ, Miloš BARTÁK et. al.Basic information
Original name
Glutathione and zeaxanthin formation during high light stress in foliose lichens
Name in Czech
Tvorba glutationu a zeaxantinu u lišejníků během stresu indukovaného vysokou ozářeností
Authors
ŠTEPIGOVÁ, Jana (703 Slovakia, guarantor), Hana VRÁBLÍKOVÁ (203 Czech Republic), Jaroslav LANG (203 Czech Republic), Kristýna VEČEŘOVÁ (203 Czech Republic) and Miloš BARTÁK (203 Czech Republic)
Edition
Bulletin CSEBR, Olomouc, ČSEBR, 2006, 1213-6670
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10600 1.6 Biological sciences
Country of publisher
Czech Republic
Confidentiality degree
není předmětem státního či obchodního tajemství
RIV identification code
RIV/00216224:14330/06:00015985
Organization unit
Faculty of Informatics
UT WoS
000254859700002
Keywords in English
photoinhibition antioxidants lichen
Tags
Reviewed
Změněno: 6/7/2007 12:32, RNDr. JUDr. Vladimír Šmíd, CSc.
V originále
It was shown that the ratio of oxidized to reduced glutathione increased after treatment of thalli by high light. In lichens, majority of studies focused on glutathione were oriented to its dynamics during thallus desiccation. Involvement of glutathione into high light stress in lichens was studied in our experiments. Zeaxanthin (Z) is a xanthophyll-cycle pigment located in chloroplastic thylakoid membranes. It plays an important role in a dissipation of an excess energy. It is formed from a diepoxide violaxanthin via monoepoxide antheraxanthine. Deepoxidation of V is conditioned by presence of light. V recovers from Z in dark and there are several hypothesis trying to describe its mechanism. It is possible that Z functions as a direct acceptor of energy from excited chlorophyll a in a reaction centre of photosystem II. Z may interact and deactivate ROS. Another hypothesis postulates that Z changes conformation of light harvesting complexes and results in enhanced thermal dissipation of excess energy. The aim of our paper was to quantify glutathione and zeaxanthin dynamics during high light stress and recovery in two lichen species: Lasallia pustulata, Umbilicaria antarctica.
In Czech
Cílem práce bylo kvantifikovat dynamiku glutationu a zeaxantinu v průběhu fotoinhibičního stresu a během následného zotavení. Experimentálními lišejníky byly Lasallia pustulata, Umbilicaria antarctica.
Links
| GA522/06/0979, research and development project |
| ||
| GP206/06/P209, research and development project |
|