About: Low-temperature limitation of primary photosynthetic processes in Antarctic lichens Umbilicaria antarctica and Xanthoria elegans

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About: Low-temperature limitation of primary photosynthetic processes in Antarctic lichens Umbilicaria antarctica and Xanthoria elegans Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Temperature response curves of chlorophyll a fluorescence parameters were used to assess minimum subzero temperature assuring functioning of photosynthetic photochemical processes in photosystem II (PS II) of Antarctic lichens. Umbilicaria Antarctica and Xanthoria elegans were measured within the temperature range from minus20 to plus10 degC by a fluorometric imaging system. For potential (F V/F M) and actual (Phi II) quantum yields of photochemical processes the minimum temperature was found to be between minus10 and minus20 degC. Nonphotochemical quenching (NPQ) of absorbed excitation energy increased with temperature drop reaching maximum NPQ at minus15 degC. Image analysis revealed intrathalline heterogeneity of chlorophyll a fluorescence parameters with temperature drop. Temperature response of Phi II exhibited an S curve with pronounced intrathalline differences in X. elegans. The same relation was linear with only limited intrathalline difference in U. antarctica. Temperature response curves of chlorophyll a fluorescence parameters were used to assess minimum subzero temperature assuring functioning of photosynthetic photochemical processes in photosystem II (PS II) of Antarctic lichens. Umbilicaria Antarctica and Xanthoria elegans were measured within the temperature range from minus20 to plus10 degC by a fluorometric imaging system. For potential (F V/F M) and actual (Phi II) quantum yields of photochemical processes the minimum temperature was found to be between minus10 and minus20 degC. Nonphotochemical quenching (NPQ) of absorbed excitation energy increased with temperature drop reaching maximum NPQ at minus15 degC. Image analysis revealed intrathalline heterogeneity of chlorophyll a fluorescence parameters with temperature drop. Temperature response of Phi II exhibited an S curve with pronounced intrathalline differences in X. elegans. The same relation was linear with only limited intrathalline difference in U. antarctica. (en)
Title	Low-temperature limitation of primary photosynthetic processes in Antarctic lichens Umbilicaria antarctica and Xanthoria elegans Low-temperature limitation of primary photosynthetic processes in Antarctic lichens Umbilicaria antarctica and Xanthoria elegans (en)
skos:prefLabel	Low-temperature limitation of primary photosynthetic processes in Antarctic lichens Umbilicaria antarctica and Xanthoria elegans Low-temperature limitation of primary photosynthetic processes in Antarctic lichens Umbilicaria antarctica and Xanthoria elegans (en)
skos:notation	RIV/00216224:14310/07:00022948!RIV10-MSM-14310___
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(ME 945)
http://linked.open...iv/cisloPeriodika	1
http://linked.open...vai/riv/dodaniDat	2010
http://linked.open...aciTvurceVysledku	Hájek, Josef Barták, Miloš Váczi, Peter
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Masarykova univerzita / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	431508
http://linked.open...ai/riv/idVysledku	RIV/00216224:14310/07:00022948
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Chlorophyll fluorescence imaging; Extreme temperature; Freezing; Non-photochemical quenching (en)
http://linked.open.../riv/klicoveSlovo	Freezing Non-photochemical quenching Extreme temperature Chlorophyll fluorescence imaging
http://linked.open...odStatuVydavatele	DE - Spolková republika Německo
http://linked.open...ontrolniKodProRIV	[9FCA190BE12E]
http://linked.open...i/riv/nazevZdroje	Polar Biology
http://linked.open...in/vavai/riv/obor	EF
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	http://linked.opendata.cz/resource/domain/vavai/projekt/ME%20945
http://linked.open...UplatneniVysledku	2007
http://linked.open...v/svazekPeriodika	31
http://linked.open...iv/tvurceVysledku	Barták, Miloš Hájek, Josef Váczi, Peter Smykla, Jerzy
http://linked.open...ain/vavai/riv/wos	000251717100006
issn	0722-4060
number of pages	5 (xsd:int)
http://localhost/t...ganizacniJednotka	14310
is http://linked.open...avai/riv/vysledek of	Low-temperature limitation of primary photosynthetic processes in Antarctic lichens Umbilicaria antarctica and Xanthoria elegans Low-temperature limitation of primary photosynthetic processes in Antarctic lichens Umbilicaria antarctica and Xanthoria elegans Low-temperature limitation of primary photosynthetic processes in Antarctic lichens Umbilicaria antarctica and Xanthoria elegans

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