About: Evidence for a role of raffinose in stabilizing photosystem II during freeze-thaw cycles

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About: Evidence for a role of raffinose in stabilizing photosystem II during freeze-thaw cycles Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	A role of non-reducing sugars like sucrose and raffinose in the protection of plant cells against damage during freezing has been proposed for many species, but reports on physiological effects are conflicting. Non-aqueous fractionation of mesophyll cell compartments in Arabidopsis thaliana was used to show that sucrose and raffinose accumulate in plastids during low temperatures, pointing to a physiological role in protecting the photosynthetic apparatus. Comparing a previously described raffinose synthase (RS) mutant of A. thaliana with its corresponding wild type, accession Col-0, revealed that a lack of raffinose has no effect on electrolyte leakage from leaf cells after freeze-thaw cycles, supporting that raffinose is not essential for protecting the plasma membrane. However, in situ chlorophyll fluorescence showed that maximum quantum yield of PS II photochemistry (F (v)/F (m)) and other fluorescence parameters of cold acclimated leaves subjected to freeze-thaw cycles were significantly lower in the raffinose synthase mutant than in the corresponding wild type, indicating that raffinose is involved in stabilizing PS II of cold acclimated leaf cells against damage during freezing. A role of non-reducing sugars like sucrose and raffinose in the protection of plant cells against damage during freezing has been proposed for many species, but reports on physiological effects are conflicting. Non-aqueous fractionation of mesophyll cell compartments in Arabidopsis thaliana was used to show that sucrose and raffinose accumulate in plastids during low temperatures, pointing to a physiological role in protecting the photosynthetic apparatus. Comparing a previously described raffinose synthase (RS) mutant of A. thaliana with its corresponding wild type, accession Col-0, revealed that a lack of raffinose has no effect on electrolyte leakage from leaf cells after freeze-thaw cycles, supporting that raffinose is not essential for protecting the plasma membrane. However, in situ chlorophyll fluorescence showed that maximum quantum yield of PS II photochemistry (F (v)/F (m)) and other fluorescence parameters of cold acclimated leaves subjected to freeze-thaw cycles were significantly lower in the raffinose synthase mutant than in the corresponding wild type, indicating that raffinose is involved in stabilizing PS II of cold acclimated leaf cells against damage during freezing. (en)
Title	Evidence for a role of raffinose in stabilizing photosystem II during freeze-thaw cycles Evidence for a role of raffinose in stabilizing photosystem II during freeze-thaw cycles (en)
skos:prefLabel	Evidence for a role of raffinose in stabilizing photosystem II during freeze-thaw cycles Evidence for a role of raffinose in stabilizing photosystem II during freeze-thaw cycles (en)
skos:notation	RIV/67179843:_____/11:00376209!RIV12-AV0-67179843
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(2B06068), P(OC08055), Z(AV0Z60870520)
http://linked.open...iv/cisloPeriodika	3
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Nedbal, Ladislav Mishra, Kumud
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	Centrum výzkumu globální změny AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	198444
http://linked.open...ai/riv/idVysledku	RIV/67179843:_____/11:00376209
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	arabidopsis; cold tolerance; freezing damage; raffinose; chlorophyll fluorescence (en)
http://linked.open.../riv/klicoveSlovo	arabidopsis freezing damage raffinose cold tolerance chlorophyll fluorescence
http://linked.open...odStatuVydavatele	DE - Spolková republika Německo
http://linked.open...ontrolniKodProRIV	[939B7870DC91]
http://linked.open...i/riv/nazevZdroje	Planta
http://linked.open...in/vavai/riv/obor	EH
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Evaluation, Verification and Interpretation of the environmental loads of the Czech Republic Designing tools and methodology for screening of abiotic stress resistance in plants.
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	234
http://linked.open...iv/tvurceVysledku	Heyer, A. G. Mishra, Kumud Nedbal, Ladislav Knaupp, M.
http://linked.open...ain/vavai/riv/wos	000294349900004
http://linked.open...n/vavai/riv/zamer	Spatial and functional dynamics of biological, ecological and socio-economic systems interacting with global climatic change
issn	0032-0935
number of pages	10 (xsd:int)
http://bibframe.org/vocab/doi	10.1007/s00425-011-1413-0

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