Effects of controlled oxidative stress and uncouplers on primary photosynthetic processes in vegetative cells of Antarctic alga Zygnema sp.

KAKKOU, Christos, Miloš BARTÁK, Josef HÁJEK, Kateřina SKÁCELOVÁ and Jana HAZDROVÁ. Effects of controlled oxidative stress and uncouplers on primary photosynthetic processes in vegetative cells of Antarctic alga Zygnema sp. Czech Polar Reports. Brno: Masarykova univerzita, 2016, vol. 6, No 1, p. 96-107. ISSN 1805-0689. Available from: https://dx.doi.org/10.5817/CPR2016-1-10.

Basic information

• Original name: Effects of controlled oxidative stress and uncouplers on primary photosynthetic processes in vegetative cells of Antarctic alga Zygnema sp.
• Name in Czech: Vlivy řízeného oxidativního stresu a uncouplerů na primární fotosyntteické procesy antarktické řasy Zygnema sp.
• Authors: KAKKOU, Christos (196 Cyprus, belonging to the institution), Miloš BARTÁK (203 Czech Republic, guarantor, belonging to the institution), Josef HÁJEK (203 Czech Republic, belonging to the institution), Kateřina SKÁCELOVÁ (203 Czech Republic, belonging to the institution) and Jana HAZDROVÁ (203 Czech Republic, belonging to the institution).
• Edition: Czech Polar Reports, Brno, Masarykova univerzita, 2016, 1805-0689.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10600 1.6 Biological sciences
• Country of publisher: Czech Republic
• Confidentiality degree: is not subject to a state or trade secret
• WWW: fulltext link
• RIV identification code: RIV/00216224:14310/16:00091592
• Organization unit: Faculty of Science
• Doi: http://dx.doi.org/10.5817/CPR2016-1-10
• Keywords (in Czech): fluorescence chlorofylu, fotosystém II, vláknitá řasa, blokátory fotosyntézy
• Keywords in English: chlorophyll fluorescence: PS II: alga fillamentous: photosynthesis blockers
• Tags: AKR, rivok
• Tags: Reviewed

Abstract

In our study, we present responses of Antarctic strain of filamentous alga Zygnema sp. collected at James Ross Island (Antarctica) to application of variuos uncouplers of pri-mary photosynthetic processes. We exposed the alga to different concentrations of nigericin, 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU), dithiothreitol (DTT), methyl viologen (MV) and hydrogen peroxide (H2O2) in order to test stability of photosystem II, involvement of non-photochemical quenching, and PS II functioning under combination of moderate light with particular uncoupler. Oxidative stress tolerance was tested by the combination of hydrogen peroxide (H2O2) and moderate light. Time courses of FV/FM, FPSII, NPQ and qF0 were investigated and particular effects of the above-specified chem-icals discussed. Moderate doses of uncouplers allowing partial recovery, and the doses causing full inhibition of PS II were specified.

Abstract (in Czech)

Byl studován vliv nigericinu, DCMU, DTT, MV a peroxidu vodíku na fotosynteticke procesy ve fotosystému II vláknité zelené řasy Zygnema sp. z Antarktidy.

Links

• LM2010009, research and development project: Name: Projekt CzechPolar - České polární stanice: Stavba a operační náklady

Investor: Ministry of Education, Youth and Sports of the CR