J 2019

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

MAREČKOVÁ, Michaela, Miloš BARTÁK and Josef HÁJEK

Basic information

Original name

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

Name in Czech

Účinky teploty na fotosyntézu lišejníku Dermatocarpon polyphyllizum: Studie fluorescence chlorofylu

Authors

MAREČKOVÁ, Michaela (203 Czech Republic, guarantor, belonging to the institution), Miloš BARTÁK (203 Czech Republic, belonging to the institution) and Josef HÁJEK (203 Czech Republic, belonging to the institution)

Edition

Polar Biology, New York, Springer, 2019, 0722-4060

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10611 Plant sciences, botany

Country of publisher

United Kingdom of Great Britain and Northern Ireland

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Impact factor

Impact factor: 1.728

RIV identification code

RIV/00216224:14310/19:00109438

Organization unit

Faculty of Science

UT WoS

000461817700004

Keywords (in Czech)

Diplosphaera sp.; OJIP; Kautského kientika; lineární ochlazování; fotosystém II

Keywords in English

Diplosphaera sp.; OJIP; K-step; Kautsky kinetic; Linear cooling; Photosystem II

Tags

Tags

International impact, Reviewed
Změněno: 23/3/2020 16:20, Mgr. Marie Šípková, DiS.

Abstract

V originále

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.

In Czech

Fluorescence chlorofylu

Links

EF16_013/0001708, research and development project
Name: ECOPOLARIS - Změny ve struktuře a funkci součástí terestrických polárních ekosystémů (CzechPolar2)
LM2015078, research and development project
Name: Česká polární výzkumná infrastruktura (Acronym: CzechPolar2)
Investor: Ministry of Education, Youth and Sports of the CR