Photosystem I is not solely responsible for oxygen reduction in isolated thylakoids

被引：38

作者：

Khorobrykh, S ^{[1
]}

Mubarakshina, M ^{[1
]}

Ivanov, B ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Basic Biol Programs, Pushchino 142290, Moscow Region, Russia

来源：

BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS | 2004年 / 1657卷 / 2-3期

基金：

俄罗斯基础研究基金会;

关键词：

photoreduction of oxygen; thylakoid; plastoquinone pool;

D O I：

10.1016/j.bbabio.2004.04.009

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

It was found that the contribution of segments of photosynthetic electron transport chain (PETC) besides Photosystem I (PSI) to oxygen reduction increased with increase in light intensity, and at high intensities achieved 50% at pH 5.0, and was higher than 60% at pH 6.5 and pH 7.8. The data are explained as the result Of O-2 reduction in plastoquinone (PQ) pool as well as in PSI followed by reduction of superoxide radicals generated in both processes by plastohydroquinone. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：164 / 167

页数：4

共 19 条

[1]

Allen JF, 2000, PHILOS T R SOC B, V355, P1351, DOI 10.1098/rstb.2000.0697

[2] RELATIONSHIP OF OXYGEN-UPTAKE TO ELECTRON-TRANSPORT IN PHOTOSYSTEM-I OF ISOLATED-CHLOROPLASTS - ROLE OF SUPEROXIDE AND ASCORBATE [J].

ALLEN, JF ;

HALL, DO .

BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS, 1974, 58 (03) :579-585

[3] SUPEROXIDE REDUCTION AS A MECHANISM OF ASCORBATE-STIMULATED OXYGEN-UPTAKE BY ISOLATED CHLOROPLASTS [J].

ALLEN, JF ;

HALL, DO .

BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS, 1973, 52 (03) :856-862

[4] The water-water cycle in chloroplasts: Scavenging of active oxygens and dissipation of excess photons [J].

Asada, K .

ANNUAL REVIEW OF PLANT PHYSIOLOGY AND PLANT MOLECULAR BIOLOGY, 1999, 50 :601-639

[5] COMPARATIVE ASPECTS OF QUINOL-CYTOCHROME C/PLASTOCYANIN OXIDOREDUCTASES [J].

HAUSKA, G ;

HURT, E ;

GABELLINI, N ;

LOCKAU, W .

BIOCHIMICA ET BIOPHYSICA ACTA, 1983, 726 (02) :97-133

[6] NATIVE AND ARTIFICIAL ENERGY-CONSERVING SITES IN CYCLIC PHOTOPHOSPHORYLATION SYSTEMS [J].

HAUSKA, G ;

REIMER, S ;

TREBST, A .

BIOCHIMICA ET BIOPHYSICA ACTA, 1974, 357 (01) :1-13

[7] INTACT CHLOROPLASTS DISPLAY PH-5 OPTIMUM OF O2-REDUCTION IN THE ABSENCE OF METHYL VIOLOGEN - INDIRECT EVIDENCE FOR A REGULATORY ROLE OF SUPEROXIDE PROTONATION [J].

HORMANN, H ;

NEUBAUER, C ;

ASADA, K ;

SCHREIBER, U .

PHOTOSYNTHESIS RESEARCH, 1993, 37 (01) :69-80

[8] Participation of photosynthetic electron transport in production and scavenging of reactive oxygen species [J].

Ivanov, B ;

Khorobrykh, S .

ANTIOXIDANTS & REDOX SIGNALING, 2003, 5 (01) :43-53

[9] STRUCTURE OF THE PHYLLOQUINONE-BINDING (Q-PHI) SITE IN GREEN PLANT PHOTOSYSTEM-I REACTION CENTERS - THE AFFINITY OF QUINONES AND QUINONOID COMPOUNDS FOR THE Q-PHI SITE [J].

IWAKI, M ;

ITOH, S .

BIOCHEMISTRY, 1991, 30 (22) :5347-5352

[10]

Karpinska B, 2000, IUBMB LIFE, V50, P21, DOI 10.1080/15216540050176548

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