Involvement of xanthophyll cycle pigments and glutathione in photoprotection of lichen <i>Umbilicaria antarctica<i>
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F04%3A00010172" target="_blank" >RIV/00216224:14310/04:00010172 - isvavai.cz</a>
Result on the web
—
DOI - Digital Object Identifier
—
Alternative languages
Result language
angličtina
Original language name
Involvement of xanthophyll cycle pigments and glutathione in photoprotection of lichen <i>Umbilicaria antarctica<i>
Original language description
High light (HL) stress could be expected even in HL-adapted lichens when their thalli, cells of symbiotic photobiont in particular, are exposed to HL in wet state. Among several physiological photoprotective mechanisms activated during such situations, conversion of violaxanthin to zeaxanthin (Z) and capacity of glutathione (GSH) pool are of major importance. Until now, however, changes in GSH pool and its redox state have been studied in lichens only in relation to water stress. Our experiments focusedon changes in Z (expressed as de-epoxidation state of xanthophyll cycle pigments - DEPS) and GSH during HL stress imposed on Umbilicaria antarctica. HL stress was induced by applying a strong light of 1800 umol m-2 s-1 for 30 min on hydrated thalli of U. antarctica at 20degC. Timecourse of HL stress and recovery was monitored by chlorophyll fluorescence (maximal quantum yield, Fv/Fm, non-photochemical quenching, NPQ). HL stress led to a photoinhibition demonstrated as a decrease of Fv/F
Czech name
Zapojeni pigmentu xantofyloveho cyklu a glutathionu do fotoprotekce lisejniku <i>Umbilicaria antarctica<i>
Czech description
Mezi fyziologicke fotoprotektivni mechanismy, chranici lisejniky pred svetelnym stresem, patri konverze violaxantinu na zeaxantin a kapacita antioxidacni molekuly glutathionu.
Classification
Type
D - Article in proceedings
CEP classification
EF - Botany
OECD FORD branch
—
Result continuities
Project
<a href="/en/project/GA522%2F03%2F0754" target="_blank" >GA522/03/0754: Photoinhibition and photoprotection in lichens under extreme conditions</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2004
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
14th International congress on photobiology, June 10-15, 2004, Program & Abstracts
ISBN
—
ISSN
—
e-ISSN
—
Number of pages
299
Pages from-to
222-222
Publisher name
Korean Society of Photoscience
Place of publication
Jeju, Korea
Event location
Jeju, Korea
Event date
Jun 10, 2004
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
—