Phenolic Iron Complexes Protect Glacier Ice Algae (Zygnematophyceae) Against Excessive UV and VIS Irradiation
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388971%3A_____%2F25%3A00637889" target="_blank" >RIV/61388971:_____/25:00637889 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/25:10500351 RIV/00216208:11310/25:10500351
Result on the web
<a href="https://enviromicro-journals.onlinelibrary.wiley.com/doi/10.1111/1758-2229.70149" target="_blank" >https://enviromicro-journals.onlinelibrary.wiley.com/doi/10.1111/1758-2229.70149</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1111/1758-2229.70149" target="_blank" >10.1111/1758-2229.70149</a>
Alternative languages
Result language
angličtina
Original language name
Phenolic Iron Complexes Protect Glacier Ice Algae (Zygnematophyceae) Against Excessive UV and VIS Irradiation
Original language description
Melting glacier surfaces are increasingly affected by blooms of psychrophilic microalgae, which darken the ice and lower its albedo, accelerating melting. These microalgae contain distinct vacuoles filled with brownish pigments that were earlier described as the unusual plant phenol purpurogallin. Recently, we discovered so far unreported, large amounts of iron dissolved in aqueous extracts of the glacier ice algae Ancylonema alaskanum. Since the vacuole content was very dark but the chromatographically isolated, aforementioned phenol was only yellowish, a putative complexation of iron with purpurogallin was assumed to be the reason. Application of several protocols, including Raman microscopy on both living cells and extracts, provided strong evidence that this microalga sequesters iron and forms organic metal complexes. Consequently, substantial amounts of so far uncharacterised Fe-complexes of purpurogallin are inferred to be present in Ancylonema, and that putative polymerisation of this compound impeded an earlier analytical discovery. This finding holds significant ecological implications for cold regions. The pigmentation not only enhances the tolerance of glacier ice algae to excessive UV and visible radiation but also influences our current understanding of the biochemical iron cycle in cryosphere-dominated polar and alpine regions. Further downstream consequences of this biological iron source remain to be elucidated.
Czech name
—
Czech description
—
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
10606 - Microbiology
Result continuities
Project
<a href="/en/project/GA24-10019S" target="_blank" >GA24-10019S: Snow algae blooms under climate change: unravelling the diversity patterns and seasonal dynamics to understand their current and future distribution</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
Environmental Microbiology Reports
ISSN
1758-2229
e-ISSN
1758-2229
Volume of the periodical
17
Issue of the periodical within the volume
4
Country of publishing house
US - UNITED STATES
Number of pages
11
Pages from-to
e70149
UT code for WoS article
001527217900001
EID of the result in the Scopus database
2-s2.0-105010892157