DOI: 10.1016/0014-5793(87)80576-8. In photoinhibited photosystem II particles pheophytin photoreduction remains unimpaired

In photoinhibited photosystem II particles pheophytin photoreduction remains unimpaired

10.1016/0014-5793(87)80576-8

Crossref journal-article

Wiley

FEBS Letters (311)

Abstract

Oxygen‐evolving photosystem II particles (DT 20) isolated from pea chloroplasts by digitonin‐Triton X‐100 fractionation were photoinhibited with 150 W·m−2white light, at 20°C under three conditions: aerobic, anaerobic and strongly reducing (Ehpoised to approx. −250 mV with dithionite). Hill reaction rate (H2O → BQ) and variable fluorescence (Fv) declined in parallel in all three cases with shortening half times: 30, 10 and 2.5 min, respectively. Light‐induced absorbance changes at 685 nm characteristic of reversible photoaccumulation of reduced pheophytin (Eh≈ −250 mV) remained essentially unchanged. We conclude that the three types of photoinhibitory treatment do not impair the separation of charges between chlorophyll P‐680 and pheophytin in the photosystem II reaction center.

Bibliography

Allakhverdiev, S. I., Å etlÃkovÃ¡, E., Klimov, V. V., & Å etlÃk, I. (1987). In photoinhibited photosystem II particles pheophytin photoreduction remains unimpaired. FEBS Letters, 226(1), 186â190. Portico.

Authors 4

Suleiman I. Allakhverdiev (first)
Eva Šetlíková (additional)
Vyacheslav V. Klimov (additional)
Ivan Šetlík (additional)

References 25 Referenced 67

10.1146/annurev.pp.35.060184.000311
10.1093/oxfordjournals.pcp.a074487
1981 Balaban Int. Sci. Services Philadelphia I. Šetlík E. Šetlíková J. Masojídek T. Kalina P. Mader G. Akoyunoglou Photosynthesis 481 490
10.1007/978-94-017-4973-2_57
10.1016/0005-2728(86)90166-0
10.1111/j.1751-1097.1985.tb03456.x
1984 Alan Liss New York C.J. Arntzen D.J. Kyle M. Wettern I. Ohad J.P. Thornber Biosynthesis of the Photosynthetic Apparatus 313 324
10.1016/0005-2728(86)90095-2
10.1104/pp.70.4.1004
10.1016/S0165-8646(24)00483-5 / Photobiochem. Photobiophys. by Cleland R.E. (1985)
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10.1016/0014-5793(87)80090-X
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{'key': 'e_1_2_1_20_1', 'first-page': '545', 'volume': '20', 'author': 'Karapetjan N.V.', 'year': '1973', 'journal-title': 'Fiziologija Rastenij'} / Fiziologija Rastenij by Karapetjan N.V. (1973)
{'key': 'e_1_2_1_21_1', 'first-page': '1204', 'volume': '242', 'author': 'Klimov V.V.', 'year': '1978', 'journal-title': 'Dokl. Akad. Nauk SSSR'} / Dokl. Akad. Nauk SSSR by Klimov V.V. (1978)
10.1016/0005-2728(85)90184-7
10.1007/BF00118301
10.1093/oxfordjournals.pcp.a074596
10.1104/pp.82.1.261
10.1007/BF00402859

Dates

Type	When
Created	23 years, 1 month ago (July 25, 2002, 5:35 a.m.)
Deposited	9 months ago (Dec. 3, 2024, 5:57 a.m.)
Indexed	1 day, 14 hours ago (Sept. 4, 2025, 9:38 a.m.)
Issued	37 years, 8 months ago (Dec. 21, 1987)
Published	37 years, 8 months ago (Dec. 21, 1987)
Published Online	23 years, 10 months ago (Oct. 19, 2001)
Published Print	37 years, 8 months ago (Dec. 21, 1987)

Funders 0

None

BibTeX

@article{Allakhverdiev_1987, title={In photoinhibited photosystem II particles pheophytin photoreduction remains unimpaired}, volume={226}, ISSN={1873-3468}, url={http://dx.doi.org/10.1016/0014-5793(87)80576-8}, DOI={10.1016/0014-5793(87)80576-8}, number={1}, journal={FEBS Letters}, publisher={Wiley}, author={Allakhverdiev, Suleiman I. and Šetlíková, Eva and Klimov, Vyacheslav V. and Šetlík, Ivan}, year={1987}, month=dec, pages={186–190} }

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  "abstract": "<jats:p>Oxygen\u2010evolving photosystem II particles (DT 20) isolated from pea chloroplasts by digitonin\u2010Triton X\u2010100 fractionation were photoinhibited with 150 W\u00b7m<jats:sup>\u22122</jats:sup>white light, at 20\u00b0C under three conditions: aerobic, anaerobic and strongly reducing (<jats:italic>E</jats:italic><jats:sub>h</jats:sub>poised to approx. \u2212250 mV with dithionite). Hill reaction rate (H<jats:sub>2</jats:sub>O \u2192 BQ) and variable fluorescence (<jats:italic>F</jats:italic><jats:sub>v</jats:sub>) declined in parallel in all three cases with shortening half times: 30, 10 and 2.5 min, respectively. Light\u2010induced absorbance changes at 685 nm characteristic of reversible photoaccumulation of reduced pheophytin (<jats:italic>E</jats:italic><jats:sub>h</jats:sub>\u2248 \u2212250 mV) remained essentially unchanged. We conclude that the three types of photoinhibitory treatment do not impair the separation of charges between chlorophyll P\u2010680 and pheophytin in the photosystem II reaction center.</jats:p>",
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