Cryoresistance Diff erences Between Species of Autotrops From Polar Regions Sensed by Chlorophyll Fluorescence

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F23%3A00136224" target="_blank" >RIV/00216224:14310/23:00136224 - isvavai.cz</a>
Result on the web
<a href="https://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/1865/1981" target="_blank" >https://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/1865/1981</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.15407/cryo33.01.025" target="_blank" >10.15407/cryo33.01.025</a>

Result language
angličtina
Original language name
Cryoresistance Diff erences Between Species of Autotrops From Polar Regions Sensed by Chlorophyll Fluorescence
Original language description
Lichens from the cold regions of Earth exhibit high, but diff erent degree of tolerance to drought and freeze stresses. Therefore, three lichen species Xanthoria elegans, Umbilicaria cylindrica, Usnea sphacelata, and a representative of extre-mophilic cyanobacteria Nostoc commune were selected to measure temperature response curves of chlorophyll fl uorescence para-meters in cooling experiment using a constant rate of cooling from 20 to –45°C. Two chlorophyll fl uorescence parameters (FV/FM – potential yield of photosynthetic processes in photosystem II and ΦPSII – eff ective quantum yield) were measured with a modulated fl uorometer. For all experimental species, the temperature-response curves of II FV/FM and ΦPSII showed typical triphasic shape: plateau (temperature decrease from 20 to –5°C), decline, and a shoulder reaching the critical point. The phase typically formed a S-curve of diff erent shape as dependent on species and chlorophyll fl uorescence parameter. U. cylindrica was the most cryoresistant in terms of photosynthetic processes ongoing in thylakoid membrane of chloroplast at below zero temperature
Czech name
—
Czech description
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Type
J<sub>SC</sub> - Article in a specialist periodical, which is included in the SCOPUS database
CEP classification
—
OECD FORD branch
10611 - Plant sciences, botany

Project
<a href="/en/project/EF16_013%2F0001708" target="_blank" >EF16_013/0001708: ECOPOLARIS - Changes in structure and function of components of terrestrial polar ecosystems (CzechPolar2)</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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