Work

Effect of Antimycin A on Photosynthesis of Intact Spinach Chloroplasts

Year: 1971

Type: article

Abstract: Low concentrations (0.5-10 mum) of antimycin A were shown to increase the rate of CO(2) fixation, O(2) evolution and inorganic phosphate esterification in intact spinach (Spinacia oleracea) chloroplasts. The increase was highest when the light intensity was saturating. Stimulation was independent of the bicarbonate concentration and was accompanied by an enhancement in the synthesis of glycerate 3-phosphate with a decrease in dihydroxyacetone phosphate. The antibiotic decreased the Michaelis constant of the chloroplast but not of ribulose 1,5-diphosphate carboxylase for bicarbonate. It was suggested that antimycin A is affecting that portion (outer envelope) of the intact chloroplast which contains the enzyme mechanism for controlling the pace of CO(2) fixation.

Source: PLANT PHYSIOLOGY

DOI: 10.1104/pp.48.4.443

Authors: Bernice Z. Schacter, Martin Gibbs, Marie-Louise Champigny

Institution: Brandeis University

Language: English

Topic: Photosynthetic Processes and Mechanisms

Subfield: Molecular Biology

Field: Biochemistry, Genetics and Molecular Biology

Domain: Life Sciences

Open Access status: green

OpenAlex ID: W2025065362

FWCI: 0.629

Cites: 11

Cited by: 13

Related to: 10