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Statements

Subject Item
n2:RIV%2F60076658%3A12310%2F12%3A43884442%21RIV13-MSM-12310___
rdf:type
skos:Concept n16:Vysledek
dcterms:description
Paper describes chlorophyll a fluorescence measurements in algal cells, and intact plant leaves and isolated chloroplasts. It focuses on amplitude and 10 mu-resolved kinetics of variable fluorescence responses upon excitation with fluorescence-saturating pulses (SP) and with 25 mu s saturating single turnover flashes (STF) which are exposed before, during and after a 100 s actinic illumination (AL) of low and high intensity. In addition to the amply documented suppression of the maximal variable fluorescence from F-m to F'(m), the relative proportion of the distinguished O-J-, J-I- and I-P-phases of an SP-induced response is shown to be distinctly different in dark- and light-adapted leaves. The O-J-phase in the 0.01-1 ms time range is much less sensitive to light adaptation than the other phases in the 1-200 ms range. In algae and chloroplasts, the amplitude F-m(ST) of the STF-induced response is hardly affected by a shift from the dark- to the light-activated steady state. The results support the hypothesis that the maximal variable fluorescence F, induced by a multiple-turnover, fluorescence-saturating pulse (SP), is associated with the release of photochemical and photoelectrochemical quenching. It is argued that the OJIPMT- or Kautsky induction curve of variable chlorophyll fluorescence in the 0-100 s time range is the reflection of the release of photochemical quenching supplemented with a temporary Photosystem I (PSI)-dependent photoelectric stimulation and transient release of photoelectrochemical quenching of radiative energy loss in the Photosystem II (PSII) antennas, rather than solely of a decrease in PSII photochemical activity as is usually concluded. Paper describes chlorophyll a fluorescence measurements in algal cells, and intact plant leaves and isolated chloroplasts. It focuses on amplitude and 10 mu-resolved kinetics of variable fluorescence responses upon excitation with fluorescence-saturating pulses (SP) and with 25 mu s saturating single turnover flashes (STF) which are exposed before, during and after a 100 s actinic illumination (AL) of low and high intensity. In addition to the amply documented suppression of the maximal variable fluorescence from F-m to F'(m), the relative proportion of the distinguished O-J-, J-I- and I-P-phases of an SP-induced response is shown to be distinctly different in dark- and light-adapted leaves. The O-J-phase in the 0.01-1 ms time range is much less sensitive to light adaptation than the other phases in the 1-200 ms range. In algae and chloroplasts, the amplitude F-m(ST) of the STF-induced response is hardly affected by a shift from the dark- to the light-activated steady state. The results support the hypothesis that the maximal variable fluorescence F, induced by a multiple-turnover, fluorescence-saturating pulse (SP), is associated with the release of photochemical and photoelectrochemical quenching. It is argued that the OJIPMT- or Kautsky induction curve of variable chlorophyll fluorescence in the 0-100 s time range is the reflection of the release of photochemical quenching supplemented with a temporary Photosystem I (PSI)-dependent photoelectric stimulation and transient release of photoelectrochemical quenching of radiative energy loss in the Photosystem II (PSII) antennas, rather than solely of a decrease in PSII photochemical activity as is usually concluded.
dcterms:title
The analysis of PS II photochemical activity using single and multi-turnover excitations The analysis of PS II photochemical activity using single and multi-turnover excitations
skos:prefLabel
The analysis of PS II photochemical activity using single and multi-turnover excitations The analysis of PS II photochemical activity using single and multi-turnover excitations
skos:notation
RIV/60076658:12310/12:43884442!RIV13-MSM-12310___
n16:predkladatel
n17:orjk%3A12310
n3:aktivita
n4:Z n4:P
n3:aktivity
P(7E09099), P(ED2.1.00/03.0110), P(GA206/08/1683), Z(AV0Z50200510), Z(MSM6007665808)
n3:cisloPeriodika
únor
n3:dodaniDat
n7:2013
n3:domaciTvurceVysledku
n10:4430999
n3:druhVysledku
n12:J
n3:duvernostUdaju
n9:S
n3:entitaPredkladatele
n14:predkladatel
n3:idSjednocenehoVysledku
122203
n3:idVysledku
RIV/60076658:12310/12:43884442
n3:jazykVysledku
n19:eng
n3:klicovaSlova
Light adaptation; Saturating pulse technique; Photochemical quenching; Chlorophyll a fluorescence; Photochemical activity; Photosystem II
n3:klicoveSlovo
n18:Chlorophyll%20a%20fluorescence n18:Saturating%20pulse%20technique n18:Photochemical%20activity n18:Photochemical%20quenching n18:Photosystem%20II n18:Light%20adaptation
n3:kodStatuVydavatele
CH - Švýcarská konfederace
n3:kontrolniKodProRIV
[0AA420387E02]
n3:nazevZdroje
Journal of Photochemistry and Photobiology B-Biology
n3:obor
n21:BO
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
3
n3:projekt
n5:GA206%2F08%2F1683 n5:ED2.1.00%2F03.0110 n5:7E09099
n3:rokUplatneniVysledku
n7:2012
n3:svazekPeriodika
107
n3:tvurceVysledku
Prášil, Ondřej Durchan, Milan Vredenberg, Wim
n3:wos
000300477100007
n3:zamer
n13:AV0Z50200510 n13:MSM6007665808
s:issn
1011-1344
s:numberOfPages
10
n11:doi
10.1016/j.jphotobiol.2011.11.009
n15:organizacniJednotka
12310