Sensitivity of photosynthetic processes to freezing temperature in extremophilic lichens evaluated by linear cooling and chlorophyll fluorescence

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F16%3A00091424" target="_blank" >RIV/00216224:14310/16:00091424 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.cryobiol.2016.10.002" target="_blank" >http://dx.doi.org/10.1016/j.cryobiol.2016.10.002</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cryobiol.2016.10.002" target="_blank" >10.1016/j.cryobiol.2016.10.002</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Sensitivity of photosynthetic processes to freezing temperature in extremophilic lichens evaluated by linear cooling and chlorophyll fluorescence

Popis výsledku v původním jazyce

Extremophilic lichens and their photosynthesizing photobionts from the cold regions of Earth are adapted to perform photosynthesis at subzero temperatures. To evaluate interspecific differences in the critical temperature for primary photochemical processes of photosynthesis, we exposed lichen thalli of Usnea antarctica, Usnea aurantiaco-atra, and Umbilicaria cylindrica to linear cooling from +20 to minus 50 °C at a constant rate of 2 °C/min. Simultaneously, two chlorophyll fluorescence parameters (FV/FM: potential yield of photosynthetic processes in photosystem II, YieldPSII: effective quantum yield of PS II) evaluating a gradual subzero temperature-induced decline in photosynthetic processes were measured by a modulated fluorometer. For the studied species, the response of FV/FM and YieldPSII to declining temperature showed an S-curve shape. The decline in FV/FM and YieldPSII at low temperatures started at minus 5 and +5 °C, respectively in the majority of cases.

Název v anglickém jazyce

Sensitivity of photosynthetic processes to freezing temperature in extremophilic lichens evaluated by linear cooling and chlorophyll fluorescence

Popis výsledku anglicky

Extremophilic lichens and their photosynthesizing photobionts from the cold regions of Earth are adapted to perform photosynthesis at subzero temperatures. To evaluate interspecific differences in the critical temperature for primary photochemical processes of photosynthesis, we exposed lichen thalli of Usnea antarctica, Usnea aurantiaco-atra, and Umbilicaria cylindrica to linear cooling from +20 to minus 50 °C at a constant rate of 2 °C/min. Simultaneously, two chlorophyll fluorescence parameters (FV/FM: potential yield of photosynthetic processes in photosystem II, YieldPSII: effective quantum yield of PS II) evaluating a gradual subzero temperature-induced decline in photosynthetic processes were measured by a modulated fluorometer. For the studied species, the response of FV/FM and YieldPSII to declining temperature showed an S-curve shape. The decline in FV/FM and YieldPSII at low temperatures started at minus 5 and +5 °C, respectively in the majority of cases.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EF - Botanika

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Cryobiology

ISSN

0011-2240

e-ISSN

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Svazek periodika

73

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

329-334

Kód UT WoS článku

000389010600005

EID výsledku v databázi Scopus

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