About: Involvement of xanthophyll cycle pigments and glutathione in photoprotection of lichen <i>Umbilicaria antarctica<i>     Goto   Sponge   NotDistinct   Permalink

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  • 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 focused on 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/Fm and an increas
  • 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 focused on 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/Fm and an increas (en)
  • Mezi fyziologicke fotoprotektivni mechanismy, chranici lisejniky pred svetelnym stresem, patri konverze violaxantinu na zeaxantin a kapacita antioxidacni molekuly glutathionu. (cs)
Title
  • Zapojeni pigmentu xantofyloveho cyklu a glutathionu do fotoprotekce lisejniku <i>Umbilicaria antarctica<i> (cs)
  • Involvement of xanthophyll cycle pigments and glutathione in photoprotection of lichen <i>Umbilicaria antarctica<i>
  • Involvement of xanthophyll cycle pigments and glutathione in photoprotection of lichen <i>Umbilicaria antarctica<i> (en)
skos:prefLabel
  • Zapojeni pigmentu xantofyloveho cyklu a glutathionu do fotoprotekce lisejniku <i>Umbilicaria antarctica<i> (cs)
  • Involvement of xanthophyll cycle pigments and glutathione in photoprotection of lichen <i>Umbilicaria antarctica<i>
  • Involvement of xanthophyll cycle pigments and glutathione in photoprotection of lichen <i>Umbilicaria antarctica<i> (en)
skos:notation
  • RIV/00216224:14310/04:00010172!RIV08-MSM-14310___
http://linked.open.../vavai/riv/strany
  • 222-222
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(GA522/03/0754), Z(MSM 143100007)
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 568953
http://linked.open...ai/riv/idVysledku
  • RIV/00216224:14310/04:00010172
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • high light stress; lichens; zeaxanthin; glutathione; chlorophyll fluorescence (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...ontrolniKodProRIV
  • [BB9FE737BA14]
http://linked.open...v/mistoKonaniAkce
  • Jeju, Korea
http://linked.open...i/riv/mistoVydani
  • Jeju, Korea
http://linked.open...i/riv/nazevZdroje
  • 14th International congress on photobiology, June 10-15, 2004, Program & Abstracts
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...iv/tvurceVysledku
  • Barták, Miloš
  • Cempírková, Hana
http://linked.open...vavai/riv/typAkce
http://linked.open.../riv/zahajeniAkce
http://linked.open...n/vavai/riv/zamer
number of pages
http://purl.org/ne...btex#hasPublisher
  • Korean Society of Photoscience
http://localhost/t...ganizacniJednotka
  • 14310
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