| ŠTEPIGOVÁ, Jana, Hana VRÁBLÍKOVÁ, Jaroslav LANG, Kristýna VEČEŘOVÁ a Miloš BARTÁK. Glutathione and zeaxanthin formation during high light stress in foliose lichens. Plant, Soil and Environment. Prague, 2007, roč. 53/2007, č. 8, s. 340-344. ISSN 1214-1178. |
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@article{756242,
author = {Štepigová, Jana and Vráblíková, Hana and Lang, Jaroslav and Večeřová, Kristýna and Barták, Miloš},
article_location = {Prague},
article_number = {8},
keywords = {photoinhibition antioxidants lichen},
language = {eng},
issn = {1214-1178},
journal = {Plant, Soil and Environment},
title = {Glutathione and zeaxanthin formation during high light stress in foliose lichens},
volume = {53/2007},
year = {2007}
}
TY - JOUR
ID - 756242
AU - Štepigová, Jana - Vráblíková, Hana - Lang, Jaroslav - Večeřová, Kristýna - Barták, Miloš
PY - 2007
TI - Glutathione and zeaxanthin formation during high light stress in foliose lichens
JF - Plant, Soil and Environment
VL - 53/2007
IS - 8
SP - 340-344
EP - 340-344
SN - 12141178
KW - photoinhibition antioxidants lichen
N2 - 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.
ER -
ŠTEPIGOVÁ, Jana, Hana VRÁBLÍKOVÁ, Jaroslav LANG, Kristýna VEČEŘOVÁ a Miloš BARTÁK. Glutathione and zeaxanthin formation during high light stress in foliose lichens. \textit{Plant, Soil and Environment}. Prague, 2007, roč.~53/2007, č.~8, s.~340-344. ISSN~1214-1178.
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