J 2005

Changes in glutathione and xanthophyll cycle pigments in high light-stressed lichens Umbilicaria antarctica and Lasallia pustulata

VRÁBLÍKOVÁ, Hana, Miloš BARTÁK and Astrid WÖNISCH

Basic information

Original name

Changes in glutathione and xanthophyll cycle pigments in high light-stressed lichens Umbilicaria antarctica and Lasallia pustulata

Name in Czech

Zmeny v glutathionu a pigmentech xantofyloveho cycklu v lisejnicich Umbilicaria antarctica a Lasallia pustulata vystavenym pusobeni nadmerne ozarenosti

Name (in English)

Changes in glutathione and xanthophyll cycle pigments in high light-stressed lichens Umbilicaria antarctica and Lasallia pustulata

Authors

VRÁBLÍKOVÁ, Hana (203 Czech Republic, guarantor), Miloš BARTÁK (203 Czech Republic) and Astrid WÖNISCH (40 Austria)

Edition

Journal of Photochemistry and Photobiology B: biology, Elsevier, 2005, 1011-1344

Other information

Language

Czech

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

Impact factor

Impact factor: 1.597

RIV identification code

RIV/00216224:14310/05:00012376

Organization unit

Faculty of Science

UT WoS

000228202800004

Keywords in English

High light; Glutathione; Zeaxanthin; Non-photochemical quenching; Photoinhibition; Lichens

Tags

Změněno: 26/6/2009 20:04, Mgr. Hana Cempírková, Ph.D.

Abstract

ORIG EN

V originále

Hydrated thalli of two lichen species Umbilicaria antarctica and Lasallia pustulata were exposed to high light (1800 umol m-2 s-1) for 30 min. High light exposure led to a decrease of total glutathione in both species, while de-epoxidation state of xanthophyll cycle pigments and non-photochemical quenching increased. In the subsequent recovery, the values of de-epoxidation state of xanthophyll cycle pigments decreased towards initial values. Glutathione (GSH) was resynthetised slowly. In conclusion, zeaxanthin-related protection is probably more involved than GSH-related protection in short-term response to high light stress in U. antarctica and L. pustulata. Faster recovery from photoinhibition in L. pustulata than U. antarctica is mainly due to faster conversion of zeaxanthin to violaxanthin and larger GSH pool of former species.

In English

Hydrated thalli of two lichen species Umbilicaria antarctica and Lasallia pustulata were exposed to high light (1800 umol m-2 s-1) for 30 min. High light exposure led to a decrease of total glutathione in both species, while de-epoxidation state of xanthophyll cycle pigments and non-photochemical quenching increased. In the subsequent recovery, the values of de-epoxidation state of xanthophyll cycle pigments decreased towards initial values. Glutathione (GSH) was resynthetised slowly. In conclusion, zeaxanthin-related protection is probably more involved than GSH-related protection in short-term response to high light stress in U. antarctica and L. pustulata. Faster recovery from photoinhibition in L. pustulata than U. antarctica is mainly due to faster conversion of zeaxanthin to violaxanthin and larger GSH pool of former species.

Links

GA522/03/0754, research and development project
Name: Fotoinhibice a fotoochrana u lišejníků v extrémních podmínkách
Investor: Czech Science Foundation, Photoinhibition and photoprotection in lichens under extreme conditions
MSM 143100007, plan (intention)
Name: Ekologie pobřežní antarktické vegetační oázy
Investor: Ministry of Education, Youth and Sports of the CR, Ecology of the coastal vegetation