Temperature effects on photosynthetic performance of Antarctic lichen Dermatocarpon polyphyllizum: a chlorophyll fluorescence study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F19%3A00109438" target="_blank" >RIV/00216224:14310/19:00109438 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1007%2Fs00300-019-02464-w" target="_blank" >https://link.springer.com/article/10.1007%2Fs00300-019-02464-w</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00300-019-02464-w" target="_blank" >10.1007/s00300-019-02464-w</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Temperature effects on photosynthetic performance of Antarctic lichen Dermatocarpon polyphyllizum: a chlorophyll fluorescence study

Popis výsledku v původním jazyce

Chlorophyll fluorescence is an important indicator of a photosynthetic energy conversion in chloroplast photosystem II and responds sensitively to stress factors affecting photosynthesizing organisms. Three different methods were employed to identify the most sensitive fluorescence parameters responding to thallus temperature decrease within Antarctic lichen Dermatocarpon polyphyllizum: (1) Fast chlorophyll fluorescence transient (OJIP with parameters characterizing photosystem II functioning) (2) Slow Kautsky kinetics supplemented by saturation pulses (to evaluate quantum yield of photosynthetic processes in photosystem II, as well as maximum quantum PSII efficiency and non-photochemical and photochemical quenching), and (3) Linear cooling from +22 to-40 degrees C (to determine change in phi(PSII) and the critical temperature for PSII). A K-step (usually documented at highly stressed organisms) was found in OJIPs measured at+22 degrees C at 0.22-0.40ms and attributed to the negative effect of high temperature on PSII functioning, PSII donor side limitation in particular. At subzero temperature (-0.5, -5 degrees C), an L-step was detected at 0.05ms and related to a low temperature-induced decrease in connectivity between light-harvesting complexes and PSII. An increase of DI0/RC (the flux of dissipated excitation energy) was reported for the first time in lichens. The OJIP-derived parameters, DI0/RC and Phi_D-0 (quantum yield of energy dissipation) in particular, indicated that they might be used for the detection of early events in low temperature-affected lichens. Linear cooling data determined the critical temperature (-12 degrees C) for primary photosynthetic processes (phi(PSII)) in Dermatocarpon.

Název v anglickém jazyce

Temperature effects on photosynthetic performance of Antarctic lichen Dermatocarpon polyphyllizum: a chlorophyll fluorescence study

Popis výsledku anglicky

Chlorophyll fluorescence is an important indicator of a photosynthetic energy conversion in chloroplast photosystem II and responds sensitively to stress factors affecting photosynthesizing organisms. Three different methods were employed to identify the most sensitive fluorescence parameters responding to thallus temperature decrease within Antarctic lichen Dermatocarpon polyphyllizum: (1) Fast chlorophyll fluorescence transient (OJIP with parameters characterizing photosystem II functioning) (2) Slow Kautsky kinetics supplemented by saturation pulses (to evaluate quantum yield of photosynthetic processes in photosystem II, as well as maximum quantum PSII efficiency and non-photochemical and photochemical quenching), and (3) Linear cooling from +22 to-40 degrees C (to determine change in phi(PSII) and the critical temperature for PSII). A K-step (usually documented at highly stressed organisms) was found in OJIPs measured at+22 degrees C at 0.22-0.40ms and attributed to the negative effect of high temperature on PSII functioning, PSII donor side limitation in particular. At subzero temperature (-0.5, -5 degrees C), an L-step was detected at 0.05ms and related to a low temperature-induced decrease in connectivity between light-harvesting complexes and PSII. An increase of DI0/RC (the flux of dissipated excitation energy) was reported for the first time in lichens. The OJIP-derived parameters, DI0/RC and Phi_D-0 (quantum yield of energy dissipation) in particular, indicated that they might be used for the detection of early events in low temperature-affected lichens. Linear cooling data determined the critical temperature (-12 degrees C) for primary photosynthetic processes (phi(PSII)) in Dermatocarpon.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10611 - Plant sciences, botany

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

2019

Kód důvěrnosti údajů

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

Název periodika

Polar Biology

ISSN

0722-4060

e-ISSN

1432-2056

Svazek periodika

42

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

17

Strana od-do

685-701

Kód UT WoS článku

000461817700004

EID výsledku v databázi Scopus

2-s2.0-85062690559