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Statements

Subject Item
n2:RIV%2F60077344%3A_____%2F14%3A00431328%21RIV15-AV0-60077344
rdf:type
n15:Vysledek skos:Concept
rdfs:seeAlso
http://rstb.royalsocietypublishing.org
dcterms:description
In this contribution, the relaxation mechanisms of the non-photochemical Chl fluorescence quenching (qN) in diatoms are analyzed. An original nonlinear regression analysis of qN was used to obtain experimental evidences for the existence of three time-resolved qN components in the diatom Phaeodactylum tricornutum, namely qNf, qNi and qNs. qNf (s time-scale) and qNs (h time-scale) are exponential in shape, as qNi (min time-scale) is of sigmoidal nature and is dominant among the three components. Application of metabolic inhibitors (dithiothreitol, ammonium chloride, cadmium and diphenyleneiodonium chloride) allowed the identification of mechanisms on which each component mostly relies. qNi is linked to the relaxation of the pH gradient and the reversal of the xanthophyll cycle. qNs quantifies the stage of photoinhibition caused by the high light exposure, qNf seems to reflect fast conformational changes within thylakoid membranes in the vicinity of the photosystem II complexes. In this contribution, the relaxation mechanisms of the non-photochemical Chl fluorescence quenching (qN) in diatoms are analyzed. An original nonlinear regression analysis of qN was used to obtain experimental evidences for the existence of three time-resolved qN components in the diatom Phaeodactylum tricornutum, namely qNf, qNi and qNs. qNf (s time-scale) and qNs (h time-scale) are exponential in shape, as qNi (min time-scale) is of sigmoidal nature and is dominant among the three components. Application of metabolic inhibitors (dithiothreitol, ammonium chloride, cadmium and diphenyleneiodonium chloride) allowed the identification of mechanisms on which each component mostly relies. qNi is linked to the relaxation of the pH gradient and the reversal of the xanthophyll cycle. qNs quantifies the stage of photoinhibition caused by the high light exposure, qNf seems to reflect fast conformational changes within thylakoid membranes in the vicinity of the photosystem II complexes.
dcterms:title
Relaxation of the non-photochemical chlorophyll fluorescence quenching in diatoms: kinetics, components and mechanisms Relaxation of the non-photochemical chlorophyll fluorescence quenching in diatoms: kinetics, components and mechanisms
skos:prefLabel
Relaxation of the non-photochemical chlorophyll fluorescence quenching in diatoms: kinetics, components and mechanisms Relaxation of the non-photochemical chlorophyll fluorescence quenching in diatoms: kinetics, components and mechanisms
skos:notation
RIV/60077344:_____/14:00431328!RIV15-AV0-60077344
n3:aktivita
n7:I
n3:aktivity
I
n3:cisloPeriodika
1640
n3:dodaniDat
n13:2015
n3:domaciTvurceVysledku
n12:1203347
n3:druhVysledku
n18:J
n3:duvernostUdaju
n17:S
n3:entitaPredkladatele
n9:predkladatel
n3:idSjednocenehoVysledku
42081
n3:idVysledku
RIV/60077344:_____/14:00431328
n3:jazykVysledku
n10:eng
n3:klicovaSlova
diatom; high light stress; photoprotection; photosynthesis
n3:klicoveSlovo
n6:photoprotection n6:photosynthesis n6:diatom n6:high%20light%20stress
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[9B2ADFF07AC5]
n3:nazevZdroje
Philosophical Transactions of the Royal Society B - Biological Sciences
n3:obor
n16:BO
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
7
n3:rokUplatneniVysledku
n13:2014
n3:svazekPeriodika
369
n3:tvurceVysledku
Morant-Manceau, A. Bertrand, M. Caplat, C. Schoefs, B. Moreau, B. Roháček, Karel Jacquette, B.
n3:wos
000332468400015
s:issn
0962-8436
s:numberOfPages
8
n14:doi
10.1098/rstb.2013.0241