Publication details

Resistance of Antarctic moss Sanionia uncinata to photoinhibition: analysis of limitation of photosynthetic processes

Authors

OREKHOVA Alla BARTÁK Miloš HÁJEK Josef

Year of publication 2020
Type Article in Proceedings
Conference SPARC 2020 Proceedings
MU Faculty or unit

Faculty of Science

Citation
Web Link to conference proceedings
Keywords chlorophyll fluorescence OJIP
Description Sanionia uncinata (Hedw.) Loeske is one of the dominant moss species in both the Arctic and Antarctic regions. The aim of the series of laboratory experiments was to compare the negative effects of short-term photoinhibition on S. uncinata from two sites of Antarctica that differed in their microclimate, light regime in particular. Samples of Sanionia uncinata were collected from the James Ross Island (JRI, Solorina Valley) and the King Ross Island (KGI, Collins Bay). Photosynthetic processes were investigated in response to controlled photoinhibition (1 h exposition to 2000 µmol m-2 s -1 of photosynthetically active radiation – PAR). For this purpose, we used a LED light source (LED Lights SL 3500, Photon Systems Instruments, Czech Republic). Responses of primary photosynthetic processes to photoinhibitory treatment were evaluated by the measurements of chlorophyll fluorescence.
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