Oxidation versus reductive detoxification of SO sub 2 by chloroplasts

Journal Article · Thu Mar 01 04:00:00 EST 1990 · Plant Physiology; (USA)

DOI:https://doi.org/10.1104/pp.92.3.846· OSTI ID:5859275

Ghisi, R; Dittrich, A P.M.; Heber, U ^[1]

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1. Universitaet Wuerzburg (West Germany)

Intact chloroplasts isolated from spinach (Spinacia oleracea L. cv Yates) both oxidized and reduced added sulfite in the light. Oxidation was fast only when endogenous superoxide dismutase was inhibited by cyanide. It was largely suppressed by scavengers of oxygen radicals. After addition of O-acetylserine, chloroplasts reduced sulfite to cysteine and exhibited sulfite-dependent oxygen evolution. Cysteine synthesis from sulfite was faster than from sulfate. The results are discussed in relation to species-specific differences in the phytotoxicity of SO{sub 2}.

• OSTI ID: 5859275
• Journal Information: Plant Physiology; (USA), Journal Name: Plant Physiology; (USA) Vol. 92:3; ISSN 0032-0889; ISSN PLPHA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
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59 BASIC BIOLOGICAL SCIENCES
CELL CONSTITUENTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHLOROPLASTS
DETOXIFICATION
FOOD
MAGNOLIOPHYTA
MAGNOLIOPSIDA
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PLANTS
REDUCTION
SPINACH
SULFITES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
VEGETABLES