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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

10611 - Plant sciences, botany

Projekt

<a href="/cs/project/EF16_013%2F0001708" target="_blank" >EF16_013/0001708: ECOPOLARIS - Změny ve struktuře a funkci součástí terestrických polárních ekosystémů (CzechPolar2)</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Problems of Cryobiology and Cryomedicine

ISSN

2307-6143

e-ISSN

—

Svazek periodika

33

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

UA - Ukrajina

Počet stran výsledku

13

Strana od-do

25-37

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85162850484