Curling during desiccation protects the foliose lichen Lobaria
pulmonaria against photoinhibition.

J 2006

Curling during desiccation protects the foliose lichen Lobaria pulmonaria against photoinhibition.

BARTÁK, Miloš, Knut-Asbjorn SOLHAUG, Hana VRÁBLÍKOVÁ and Yngvar GAUSLAA

Basic information

Original name

Curling during desiccation protects the foliose lichen Lobaria pulmonaria against photoinhibition.

Name in Czech

Zvlnění stélky během vysychání chrání lupenitý lišejník Lobaria pulmonaria proti fotoinhibici.

Authors

BARTÁK, Miloš (203 Czech Republic, guarantor), Knut-Asbjorn SOLHAUG (578 Norway), Hana VRÁBLÍKOVÁ (203 Czech Republic) and Yngvar GAUSLAA (578 Norway)

Edition

Oecologia, 2006, 0029-8549

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10600 1.6 Biological sciences

Country of publisher

Spain

Confidentiality degree

není předmětem státního či obchodního tajemství

Impact factor

Impact factor: 3.333

RIV identification code

RIV/00216224:14310/06:00015902

Organization unit

Faculty of Science

UT WoS

000240799700001

Keywords in English

lichen; photosynthesis; chlorophyll fluorescence imaging; thallus movements; dehydration

Abstract

ORIG CZ

V originále

This study aims to assess the photoprotective potential of desiccation-induced curling in the light susceptible old forest lichen Lobaria pulmonaria by using chlorophyll fluorescence imaging. Naturally curled thalli showed less photoinhibition-induced limitations in primary processes of photosynthesis than artificially flattened specimens during exposures to 450 micromol m-2 s-1 in the lab after both 12 (low light treatment) and 62 h duration (high light treatment). Curled thalli exhibited less pronounced photoinhibition not only in those thallus parts shaded by curled lobes but even on the level of the whole thallus. Thallus parts shaded by curled lobes during light exposure showed unchanged values of measured chlorophyll fluorescence parameters (FV/FM, F0/FM,Phi PS II), whereas non-shaded parts of curled thalli, as well as the entire area of flattened thalli, showed photoinhibitory damage after light treatments. The chlorophyll fluorescence imaging also showed that the typical small-scale reticulated ridges on the upper side of L. pulmonaria caused a spatial, small-scale reduction in damage due to thallus morphology providing a tiny shading pattern. Severe dry-state photoinhibition readily occurred in light treated L. pulmonaria, especially in flattened samples, although the mechanisms for such damage in desiccated thalli, and thus inactive state of photobiont, are not yet well known.

In Czech

Tento článek je zaměřen na kvantifikaci fotoprotekce stélek lišejníku Lobaria pulmonaria během vyschnutí stélky pomocí metody chlorophyll fluorescence imaging.

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

Citovat

BARTÁK, Miloš, Knut-Asbjorn SOLHAUG, Hana VRÁBLÍKOVÁ and Yngvar GAUSLAA. Curling during desiccation protects the foliose lichen Lobaria pulmonaria against photoinhibition. Oecologia. 2006, vol. 149, No 4, p. 553-560. ISSN 0029-8549.

@article{698655,
   author = {Barták, Miloš and Solhaug, KnutandAsbjorn and Vráblíková, Hana and Gauslaa, Yngvar},
   article_number = {4},
   keywords = {lichen; photosynthesis; chlorophyll fluorescence imaging; thallus movements; dehydration},
   language = {eng},
   issn = {0029-8549},
   journal = {Oecologia},
   title = {Curling during desiccation protects the foliose lichen Lobaria pulmonaria against photoinhibition.},
   volume = {149},
   year = {2006}
}

TY  - JOUR
ID  - 698655
AU  - Barták, Miloš - Solhaug, Knut-Asbjorn - Vráblíková, Hana - Gauslaa, Yngvar
PY  - 2006
TI  - Curling during desiccation protects the foliose lichen Lobaria pulmonaria against photoinhibition.
JF  - Oecologia
VL  - 149
IS  - 4
SP  - 553-560
EP  - 553-560
SN  - 00298549
KW  - lichen
KW  - photosynthesis
KW  - chlorophyll fluorescence imaging
KW  - thallus movements
KW  - dehydration
N2  - This study aims to assess the photoprotective potential of desiccation-induced curling in the light susceptible old forest lichen Lobaria pulmonaria by using chlorophyll fluorescence imaging. Naturally curled thalli showed less photoinhibition-induced limitations in primary processes of photosynthesis than artificially flattened specimens during exposures to 450 micromol m-2 s-1 in the lab after both 12 (low light treatment) and 62 h duration (high light treatment). Curled thalli exhibited less pronounced photoinhibition not only in those thallus parts shaded by curled lobes but even on the level of the whole thallus. Thallus parts shaded by curled lobes during light exposure showed unchanged values of measured chlorophyll fluorescence parameters (FV/FM, F0/FM,Phi PS II), whereas non-shaded parts of curled thalli, as well as the entire area of flattened thalli, showed photoinhibitory damage after light treatments. The chlorophyll fluorescence imaging also showed that the typical small-scale reticulated ridges on the upper side of L. pulmonaria caused a spatial, small-scale reduction in damage due to thallus morphology providing a tiny shading pattern. Severe dry-state photoinhibition readily occurred in light treated L. pulmonaria, especially in flattened samples, although the mechanisms for such damage in desiccated thalli, and thus inactive state of photobiont, are not yet well known.
ER  -

BARTÁK, Miloš, Knut-Asbjorn SOLHAUG, Hana VRÁBLÍKOVÁ and Yngvar GAUSLAA. Curling during desiccation protects the foliose lichen Lobaria pulmonaria against photoinhibition. \textit{Oecologia}. 2006, vol.~149, No~4, p.~553-560. ISSN~0029-8549.

Detailed Information on Publication Record