Photosynthetic processes in two algal species from Antarctic
lakes in response to stress factors

a 2013

Photosynthetic processes in two algal species from Antarctic lakes in response to stress factors

BARTÁK, Miloš, Peter VÁCZI, Kateřina SKÁCELOVÁ, Daniel NÝVLT, David MIGUEL VILUMBRALES et. al.

Basic information

Original name

Photosynthetic processes in two algal species from Antarctic lakes in response to stress factors

Name in Czech

Fotosyntetické procesy dvou druhů řas z antarktických jezer v závislosti na stresových faktorech

Authors

BARTÁK, Miloš, Peter VÁCZI, Kateřina SKÁCELOVÁ, Daniel NÝVLT, David MIGUEL VILUMBRALES, Luděk SEHNAL, Kateřina TRNKOVÁ and Jana HAZDROVÁ

Edition

54. pracovní konference české algologické společnosti, 2013

Other information

Language

English

Type of outcome

Konferenční abstrakt

Field of Study

10600 1.6 Biological sciences

Country of publisher

Czech Republic

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

web stránka konference

Organization unit

Faculty of Science

Keywords (in Czech)

řasy jezera Antarktida kvantový výtěžek fluorometrie vývin kyslíku James Ross Island

Keywords in English

algae lakes Antarctica effective quantum yield fluorometry oxygen evolution James Ross Island

Změněno: 27/12/2013 10:51, prof. Ing. Miloš Barták, CSc.

Abstract

ORIG CZ

V originále

Klebsormidium sp. and Zygnema sp. are typical algal species forming microbiological mats in Antarctic lakes, streams and seepages of the James Ross Island (Antarctica). For physiological study focused on their photosynthesis, two strains collected at the island (Klebsormidium sp. SNOKHOUSOVA et ELSTER 2008/8, and Zygnema sp. SNOKHOUSOVA et ELSTER 2009/8) were obtained from Culture Collection of Autotrophic Organisms, Institute of Botany, Třeboň. Cultivation was carried out in liquid 3N BBM solution under constant temperature and a 12/12 h light/dark period in a FS130 phytoscope (PSI). In this study, we present the results of experiments focused on interspecific differences in photosynthesis as dependent on light, temperature, repetitive photoinhibition and osmotic stress. Light-response curves of photosynthesis: Simultaneous measurements of oxygen evolution rate (OER) and effective quantum yield of PSII (PSII yield) by an inbuilt Theta 90 (ldv) oxygen electrode and a FL-400 (PSI), fluorometer, respectively, were done at fixed above-zero temperatures. In both species, OER and yield PSII were well related throughout a range of light (0-500 micromols m-2 s-1 of photosynthetically active radiation (PAR). Photoinhibitory treatment: Using a FMT 400 photobioreactor (PSI), repetitive photoinhibition and dark recovery was studies in Klebsormidium sp. by simultaneous measurements of OER and PSII yield. The data revealed large resistance of the two species against photoinhibition, however, the courses of respiratory OER and potential PSII yield measured at dark changed with increasing number of photoinhibitory treatment. Osmotic stress: The effects of salt (NaCl) treatment on excitation energy transfer from light harvesting complexes to photosystem II (PSII) in two Antarctic algae: Klebsormidium sp. and Zygnema sp. were investigated using chlorophyll fluorescence transients (OJIPs). Short-term salt stress led to significant changes in the shape of OJIPs indicating altered functioning of PSII. With time of exposition to NaCl treatment, the fluorescence yield at the phases J, I and P declined considerably in both species.

In Czech

Fotosyntéza řas Zygnema sp. a Klebsormidium sp. z ostrova Jamese Rosse (Antarktida) v závislosti na ozářenosti, teplotě, fotoinhibici a stresu solí.

Links

1-7/2009-14, interní kód MU

Name: Pokročilé metody v bioklimatologii a ekologické fyziologii rostlin, aplikace ve výuce a výzkumu na MU Brno, včetně mzdových nákladů a odvodů na sociální a zdravotní pojištění

Investor: South-Moravian Region

Citovat

BARTÁK, Miloš, Peter VÁCZI, Kateřina SKÁCELOVÁ, Daniel NÝVLT, David MIGUEL VILUMBRALES, Luděk SEHNAL, Kateřina TRNKOVÁ and Jana HAZDROVÁ. Photosynthetic processes in two algal species from Antarctic lakes in response to stress factors. In 54. pracovní konference české algologické společnosti. 2013.

@proceedings{1138112,
   author = {Barták, Miloš and Váczi, Peter and Skácelová, Kateřina and Nývlt, Daniel and Miguel Vilumbrales, David and Sehnal, Luděk and Trnková, Kateřina and Hazdrová, Jana},
   booktitle = {54. pracovní konference české algologické společnosti},
   keywords = {algae lakes Antarctica effective quantum yield fluorometry oxygen evolution James Ross Island},
   language = {eng},
   title = {Photosynthetic processes in two algal species from Antarctic lakes in response to stress factors},
   url = {http://www.alga.cz/cas/public/index.php/site/program},
   year = {2013}
}

TY  - CONF
ID  - 1138112
AU  - Barták, Miloš - Váczi, Peter - Skácelová, Kateřina - Nývlt, Daniel - Miguel Vilumbrales, David - Sehnal, Luděk - Trnková, Kateřina - Hazdrová, Jana
PY  - 2013
TI  - Photosynthetic processes in two algal species from Antarctic lakes in response to stress factors
KW  - algae lakes Antarctica effective quantum yield fluorometry oxygen evolution James Ross Island
UR  - http://www.alga.cz/cas/public/index.php/site/program
N2  - Klebsormidium sp. and Zygnema sp. are typical algal species forming microbiological mats in Antarctic lakes, streams and seepages of the James Ross Island (Antarctica). For physiological study focused on their photosynthesis, two strains collected at the island (Klebsormidium sp. SNOKHOUSOVA et ELSTER 2008/8, and Zygnema sp. SNOKHOUSOVA et ELSTER 2009/8) were obtained from Culture Collection of Autotrophic Organisms, Institute of Botany, Třeboň. Cultivation was carried out in liquid 3N BBM solution under constant temperature and a 12/12 h light/dark period in a FS130 phytoscope (PSI). In this study, we present the results of experiments focused on interspecific differences in photosynthesis as dependent on light, temperature, repetitive photoinhibition and osmotic stress. Light-response curves of photosynthesis: Simultaneous measurements of oxygen evolution rate (OER) and effective quantum yield of PSII (PSII yield) by an inbuilt Theta 90 (ldv) oxygen electrode and a FL-400 (PSI), fluorometer, respectively, were done at fixed above-zero temperatures. In both species, OER and yield PSII were well related throughout a range of light (0-500 micromols m-2 s-1 of photosynthetically active radiation (PAR). Photoinhibitory treatment: Using a FMT 400 photobioreactor (PSI), repetitive photoinhibition and dark recovery was studies in Klebsormidium sp. by simultaneous measurements of OER and PSII yield. The data revealed large resistance of the two species against photoinhibition, however, the courses of respiratory OER and potential PSII yield measured at dark changed with increasing number of photoinhibitory treatment. Osmotic stress: The effects of salt (NaCl) treatment on excitation energy transfer from light harvesting complexes to photosystem II (PSII) in two Antarctic algae: Klebsormidium sp. and Zygnema sp. were investigated using chlorophyll fluorescence transients (OJIPs). Short-term salt stress led to significant changes in the shape of OJIPs indicating altered functioning of PSII. With time of exposition to NaCl treatment, the fluorescence yield at the phases J, I and P declined considerably in both species.
ER  -

BARTÁK, Miloš, Peter VÁCZI, Kateřina SKÁCELOVÁ, Daniel NÝVLT, David MIGUEL VILUMBRALES, Luděk SEHNAL, Kateřina TRNKOVÁ and Jana HAZDROVÁ. Photosynthetic processes in two algal species from Antarctic lakes in response to stress factors. In \textit{54. pracovní konference české algologické společnosti}. 2013.

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