Antarctic lichens exhibit diverse photobiont distributions and a complex regulation of non-photochemical quenching
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F25%3A00618828" target="_blank" >RIV/86652079:_____/25:00618828 - isvavai.cz</a>
Alternative codes found
RIV/00216224:14310/25:00141387
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S1386142525001167?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1386142525001167?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.saa.2025.125810" target="_blank" >10.1016/j.saa.2025.125810</a>
Alternative languages
Result language
angličtina
Original language name
Antarctic lichens exhibit diverse photobiont distributions and a complex regulation of non-photochemical quenching
Original language description
The structure, function, and molecular mechanisms of lichen survival in harsh habitats like Antarctica and Alpine localities, where environmental extremes change frequently, are highly interesting yet largely underexplored. We used high resolution microscopy, Raman spectroscopy, and chlorophyll a fluorescence to investigate the basic structure and function, i.e., intrathalline distribution and allocation of photobionts, as well as the heat dissipation process in three Antarctic lichens: Dermatocarpon polyphyllizum (DP), Umbilicaria antarctica (UA), and Leptogium puberulum (LP). Microscopic images of their transverse slices revealed visual insights into the heterogeneous distribution of photobionts within their structurally distinct thalli. Raman spectra showed shifts in the carotenoid Raman nu 1(C--C) band between lichens with algal (DP and UA) and cyanobacterial (LP) photobionts, and interestingly, they revealed biosynthesis of scytonemin, a UV-screening pigment, in cyanolichen LP. We found that increasing actinic irradiance has a nearly equal effect on the shape of chlorophyll fluorescence transients also during dark relaxation in lichens with algal photobionts, but it differed greatly for cyanolichen LP. The dark relaxation kinetics of non-photochemical quenching (NPQ) in experimental lichens differed significantly between lichens with algal photobionts DP and UA, however, this parameter could not be calculated in cyanolichen LP. The components of NPQ revealed that rapidly relaxing energy dependent quenching, Phi qE, is active and protects the thallus of DP predominantly, however, in UA state transition quenching, Phi qT, predominates. The diversity in NPQ across the three examined lichens revealed intriguing aspects of heat dissipation in their photobionts as a mechanism for survival under Antarctica conditions.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
40101 - Agriculture
Result continuities
Project
<a href="/en/project/GA22-29315S" target="_blank" >GA22-29315S: ExtremeAdapt – nondestructive monitoring of biomolecular response of desert extremophiles to the polyextreme environment</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy
ISSN
1386-1425
e-ISSN
1873-3557
Volume of the periodical
332
Issue of the periodical within the volume
MAY
Country of publishing house
GB - UNITED KINGDOM
Number of pages
11
Pages from-to
125810
UT code for WoS article
001425657200001
EID of the result in the Scopus database
2-s2.0-85217087410