Changes in the S0 and S1 properties during dark adaptation in oxygen-evolving Photosystem-II-enriched thylakoid membranes

Delrieu, Marie-José; Rosengard, Françoise

doi:10.1016/s0005-2728(05)80086-6

Cited by 13 publications

(7 citation statements)

References 29 publications

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“…The reversible inactivation of S 3 which we observe would be consistent with the S-state-dependence of Ca 2+-release according to Boussac and Rutherford (1988). Contrary to Delrieu and Rosengard (1991) we believe that these phenomena are not restricted to a negligible fraction of the centers in intact PS II, and propose instead that the high miss probability in the oxygen yield sequence as measured by these authors may be representative only for a small fraction of PS II adjacent to the strongly polarized electrode. Measurements at weak polarization (Plijter et al 1989) might solve this problem.…”

Section: Discussionsupporting

confidence: 86%

“…We could obtain a satisfactory fit of the data only by assuming a reversible inactivation of S 3 and a low quantum efficiency for the first turnover after dark-adaptation in a large fraction of the centers. Delrieu and Rosengard (1991) have already pointed out the possible relation to Ca 2+-and/or C1--depletion, and to the structural reorganization of the oxygen evolving complex during dark-adaptation as proposed by Beck et al (1985). The reversible inactivation of S 3 which we observe would be consistent with the S-state-dependence of Ca 2+-release according to Boussac and Rutherford (1988).…”

Section: Discussionsupporting

confidence: 85%

“…Moreover, the phase of the oscillation appears to be shifted as if there were some 10% S O in the dark. A similar observation was made by Delrieu and Rosengard (1991) and attributed to a low quantum yield on the first flash after dark-adaptation. We have verified this observation in the experiments of Fig.…”

Section: Fittingsupporting

confidence: 84%

“…The kinetics of the redox cycle of the oxygen evolving complex in PS II core particles revealed the same complications as observed by Delrieu and Rosengard (1991) in fluorescence yield oscillations in inside-out thylakoids. No detergent is used in the isolation of inside-out vesicles, so these kinetic properties may also occur to some extent in intact PS II.…”

Section: Discussionsupporting

confidence: 65%

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Absorbance difference spectra of the S-state transitions in Photosystem II core particles

Heimann

1993

Photosynth Res

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Redox changes of the oxygen evolving complex in PS II core particles were investigated by absorbance difference spectroscopy in the UV-region. The oscillation of the absorbance changes induced by a series of saturating flashes could not be explained by the minimal Kok model (Kok et al. 1970) consisting of a 4-step redox cycle, S0 → S1 → S2 → S3 → S0, although the values of most of the relevant parameters had been determined experimentally. Additional assumptions which allow a consistent fit of all data are a slow equilibration of the S3 state with an inactive state, perhaps related to Ca(2+)-release, and a low quantum efficiency for the first turnover after dark-adaptation. Difference spectra of the successive S-state transitions were determined. At wavelengths above 370 nm, they were very different due to the different contribution of a Chl bandshift in each spectrum. At shorter wavelengths, the S1 → S2 transition showed a difference spectrum similar to that reported by Dekker et al. 1984b and attributed to an Mn(III) to Mn(IV) oxidation. The spectrum of absorbance changes associated with the S2 → S3 transition was similar to that reported by Lavergne 1991 for PS II membranes. The S0 → S1 transition was associated with a smaller but still substantial absorbance increase in the UV. Differences with the spectra reported by Lavergne 1991 are attributed to electrostatic effects on electron transfer at the acceptor side associated with the S-state dependence of proton release in PS II membranes.

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Section: Discussionsupporting

confidence: 86%

Section: Discussionsupporting

confidence: 85%

Section: Fittingsupporting

confidence: 84%

Section: Discussionsupporting

confidence: 65%

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Absorbance difference spectra of the S-state transitions in Photosystem II core particles

Heimann

1993

Photosynth Res

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“…It is important to note that chlorophyll fluorescence is defined in our model according to its true physical origin, as a radiative deactivation of the excited states via rate constant of fluorescence, k F (Scheme 2 C (55,56)). Therefore, our simultaneous simulations of oxygen and fluorescence signal can provide more valuable information about the function of PSII (and in the future about the heterogeneity of PSII) and the origin of studied phenomena than numerical models, where chlorophyll fluorescence is assumed to reflect, e.g., Q À A concentration (e.g., (52)) or fitted only to the Kok model (e.g., (53)).…”

Section: The Interrelationship Between Period-four Oscillations Of Chmentioning

confidence: 99%

Evidence for Intermediate S-States as Initial Phase in the Process of Oxygen-Evolving Complex Oxidation

Jablonský

Lazár

2008

Biophysical Journal

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We have analyzed flash-induced period-four damped oscillation of oxygen evolution and chlorophyll fluorescence with the aid of a kinetic model of photosystem II. We have shown that, for simulation of the period-four oscillatory behavior of oxygen evolution, it is essential to consider the so-called intermediate S-state as an initial phase of each of the S(n)-S(n+1), (n = 0, 1, 2, 3) transitions. The intermediate S-states are defined as [S(n)Y(Z)(ox)]-states (n = 0, 1, 2, 3) and are formed with rate constant k(iSn) approximately 1.5 x 10(6) s(-1), which was determined from comparison of theoretical predictions with experimental data. The assumed intermediate S-states shift the equilibrium in reaction P680(+)Y(Z)<-->P680Y(Z)(ox) more to the right and we suggest that kinetics of the intermediate S-states reflects a relaxation process associated with changes of the redox equilibrium in the above reaction. The oxygen oscillation is simulated without the miss and double-hit parameters, if the intermediate S-states, which are not the source of the misses or the double-hits, are included in the simulation. Furthermore, we have shown that the intermediate S-states, together with S(2)Q(A)(-) charge recombination, are prerequisites for the simulation of the period-four oscillatory behavior of the chlorophyll fluorescence.

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Chlorophyll a Fluorescence Rise Induced by High Light Illumination of Dark-adapted Plant Tissue Studied by Means of a Model of Photosystem II and Considering Photosystem II Heterogeneity

Lazár

2003

Journal of Theoretical Biology

155

113

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Changes in the S0 and S1 properties during dark adaptation in oxygen-evolving Photosystem-II-enriched thylakoid membranes

Cited by 13 publications

References 29 publications

Absorbance difference spectra of the S-state transitions in Photosystem II core particles

Absorbance difference spectra of the S-state transitions in Photosystem II core particles

Evidence for Intermediate S-States as Initial Phase in the Process of Oxygen-Evolving Complex Oxidation

Chlorophyll a Fluorescence Rise Induced by High Light Illumination of Dark-adapted Plant Tissue Studied by Means of a Model of Photosystem II and Considering Photosystem II Heterogeneity

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