| ŠTEPIGOVÁ, Jana, Hana VRÁBLÍKOVÁ, Jaroslav LANG, Kristýna VEČEŘOVÁ and Miloš BARTÁK. Glutathione and zeaxanthin formation during high light stress in foliose lichens. Bulletin CSEBR. Olomouc: ČSEBR, 2006, 2/2005, No 2, p. 104-107. ISSN 1213-6670. |
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@article{702229,
author = {Štepigová, Jana and Vráblíková, Hana and Lang, Jaroslav and Večeřová, Kristýna and Barták, Miloš},
article_location = {Olomouc},
article_number = {2},
keywords = {photoinhibition antioxidants lichen},
language = {eng},
issn = {1213-6670},
journal = {Bulletin CSEBR},
title = {Glutathione and zeaxanthin formation during high light stress in foliose lichens},
volume = {2/2005},
year = {2006}
}
TY - JOUR
ID - 702229
AU - Štepigová, Jana - Vráblíková, Hana - Lang, Jaroslav - Večeřová, Kristýna - Barták, Miloš
PY - 2006
TI - Glutathione and zeaxanthin formation during high light stress in foliose lichens
JF - Bulletin CSEBR
VL - 2/2005
IS - 2
SP - 104-107
EP - 104-107
PB - ČSEBR
SN - 12136670
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 and Miloš BARTÁK. Glutathione and zeaxanthin formation during high light stress in foliose lichens. \textit{Bulletin CSEBR}. Olomouc: ČSEBR, 2006, 2/2005, No~2, p.~104-107. ISSN~1213-6670.
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