About: Addition of ribitol into Xanthoparmelia somloensis thallus alters photosynthetic processes in PS II of symbiotic alga at sub-zero temperature

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About: Addition of ribitol into Xanthoparmelia somloensis thallus alters photosynthetic processes in PS II of symbiotic alga at sub-zero temperature Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Ribitol and other polyols have a cryoprotective role in plants and lichens. We tested positive effects of extrenally added ribitol (32, 50 mM)on primary photochemical processes at low temperature (5, 0, and -5 deg C) in X. somloensis. After ribitol addition, thalli segments were exposed to 300 umol m-2 s-1 at the above temperatures for 168 h. Each 24 h, chlorophyll fl uorescence parameters (Fv/Fm, effective quantum yield of PS II - Yield PS II, non-photochemical quenching - NPQ) were measured by an imaging fl uorometer (HFC-010, P.S.I., CZ). Positive effect of ribitol on Fv/Fm and Yield PS II, was apparent only at -5 deg C. The significant effect was seen early, i.e. within the fi rst 24 h. The difference in Fv/Fm and Yield PS II between control and 32 mM treated thalli was seen throughout the whole exposition period. Surprisingly, 50 mM treatment led to a decrease in Fv/Fm and Yield PS II values at -5 deg C, while no change was seen at 0, 5 deg C. Ribitol and other polyols have a cryoprotective role in plants and lichens. We tested positive effects of extrenally added ribitol (32, 50 mM)on primary photochemical processes at low temperature (5, 0, and -5 deg C) in X. somloensis. After ribitol addition, thalli segments were exposed to 300 umol m-2 s-1 at the above temperatures for 168 h. Each 24 h, chlorophyll fl uorescence parameters (Fv/Fm, effective quantum yield of PS II - Yield PS II, non-photochemical quenching - NPQ) were measured by an imaging fl uorometer (HFC-010, P.S.I., CZ). Positive effect of ribitol on Fv/Fm and Yield PS II, was apparent only at -5 deg C. The significant effect was seen early, i.e. within the fi rst 24 h. The difference in Fv/Fm and Yield PS II between control and 32 mM treated thalli was seen throughout the whole exposition period. Surprisingly, 50 mM treatment led to a decrease in Fv/Fm and Yield PS II values at -5 deg C, while no change was seen at 0, 5 deg C. (en)
Title	Addition of ribitol into Xanthoparmelia somloensis thallus alters photosynthetic processes in PS II of symbiotic alga at sub-zero temperature Addition of ribitol into Xanthoparmelia somloensis thallus alters photosynthetic processes in PS II of symbiotic alga at sub-zero temperature (en)
skos:prefLabel	Addition of ribitol into Xanthoparmelia somloensis thallus alters photosynthetic processes in PS II of symbiotic alga at sub-zero temperature Addition of ribitol into Xanthoparmelia somloensis thallus alters photosynthetic processes in PS II of symbiotic alga at sub-zero temperature (en)
skos:notation	RIV/00216224:14310/08:00024269!RIV10-AV0-14310___
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(KJB601630808)
http://linked.open...vai/riv/dodaniDat	2010
http://linked.open...aciTvurceVysledku	Smejkal, Lubomír Hájek, Josef Barták, Miloš Váczi, Peter
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
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	354909
http://linked.open...ai/riv/idVysledku	RIV/00216224:14310/08:00024269
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	polyols; cryoprotective role; low temperature; ribitol (en)
http://linked.open.../riv/klicoveSlovo	low temperature polyols cryoprotective role ribitol
http://linked.open...ontrolniKodProRIV	[2969D2F7BE54]
http://linked.open...v/mistoKonaniAkce	Tampere, Finland
http://linked.open...i/riv/mistoVydani	Lund
http://linked.open...i/riv/nazevZdroje	Physiologia Plantarum. Special Issue: Redox Signal Integration. FESPB 2008 Abstracts
http://linked.open...in/vavai/riv/obor	EF
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Effects of low and freezing temperatures on photosynthesis in lichen symbiotic algae affected by ribitol.
http://linked.open...UplatneniVysledku	2008
http://linked.open...iv/tvurceVysledku	Barták, Miloš Hájek, Josef Váczi, Peter Smejkal, Lubomír
http://linked.open...vavai/riv/typAkce	EUR - Evropská
http://linked.open.../riv/zahajeniAkce	2008-01-01 (xsd:date)
issn	0031-9317
number of pages	1 (xsd:int)
http://purl.org/ne...btex#hasPublisher	John Wiley - Blackwell
http://localhost/t...ganizacniJednotka	14310

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