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Miginiac-Maslow M, Champigny ML. Relationship between the Level of Adenine Nucleotides and the Carboxylation Activity of Illuminated Isolated Spinach Chloroplasts: A Study with Antimycin A. Plant Physiol. 1974;53(6):856-62doi: 10.1104/pp.53.6.856.
Miginiac-Maslow, M., & Champigny, M. L. (1974). Relationship between the Level of Adenine Nucleotides and the Carboxylation Activity of Illuminated Isolated Spinach Chloroplasts: A Study with Antimycin A. Plant physiology, 53(6), 856-62. https://doi.org/10.1104/pp.53.6.856
Miginiac-Maslow, M, and Champigny, M L. "Relationship between the Level of Adenine Nucleotides and the Carboxylation Activity of Illuminated Isolated Spinach Chloroplasts: A Study with Antimycin A." Plant physiology vol. 53,6 (1974): 856-62. doi: https://doi.org/10.1104/pp.53.6.856
Miginiac-Maslow M, Champigny ML. Relationship between the Level of Adenine Nucleotides and the Carboxylation Activity of Illuminated Isolated Spinach Chloroplasts: A Study with Antimycin A. Plant Physiol. 1974 Jun;53(6):856-62. doi: 10.1104/pp.53.6.856. PMID: 16658804; PMCID: PMC541462.
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Plant Physiol. 1974 Jun;53(6):856-62. doi: 10.1104/pp.53.6.856.

Relationship between the Level of Adenine Nucleotides and the Carboxylation Activity of Illuminated Isolated Spinach Chloroplasts: A Study with Antimycin A.

Plant physiology

M Miginiac-Maslow, M L Champigny

Affiliations

  1. Physiologie Cellulaire Végétale, Centre National de la Recherche Scientifique, Université Paris-Sud, 91405 Orsay, France.

PMID: 16658804 PMCID: PMC541462 DOI: 10.1104/pp.53.6.856

Abstract

The changes in the levels of intact spinach (Spinacia oleracea L.) chloroplast adenine nucleotides during the time course of light-dependent CO(2) fixation were determined with respect to the effect of antimycin A. This study demonstrated that antimycin A lowered the rate of ATP formation during the induction period of carboxylation. While the steady state levels of ATP and the energy-charge value also decreased in the presence of antimycin, the concomitant increase of the CO(2) fixation activities insured higher ATP turnover rates. Changes in the labeling of CO(2) fixation products during the lag phase suggested a stepwise activation of the Calvin cycle, with fructose 1,6-diphosphate, and ribulose 5-phosphate kinase being activated before ribulose 1,5-diphosphate carboxylase. The possible mechanisms of the enhancement of CO(2) fixation activity by antimycin A in relation to its action on photophosphorylation during the lag phase are discussed.

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