The Path of Carbon in Photosynthesis. X. Carbon Dioxideassimilation in Plants

Calvin, Melvin; Bassham, James A.; Benson, A. A.; Lynch, Victoria H.; Ouellet, Cyrias; Schou, L.; Stepka, W.; Tolbert, N. E.

doi:10.2172/910355

Cited by 8 publications

(18 citation statements)

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“…Early experiments of Calvin et al (6) (14), using Chlorella and Scenedesmus, found substantially higher incorporation of CO, into serine, glycine, and glycolate at pH 8.8 than at pH 7.0.…”

Section: Introductionmentioning

confidence: 96%

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The Effect of pH on the Products of Photosynthesis in ¹⁴CO₂ by Chloroplast Preparations from Acetabularia mediterranea

Dodd

Bidwell

1971

Plant Physiol.

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The effect of pH on the pathways of carbon in photosynthesis was examined in chloroplast preparations from Acetabularia mediterranea. The flow of carbon into a number of photosynthetic intermediates, particularly sucrose, glycine, serine, glycolate, and the insoluble fraction, was strongly influenced by pH. At higher pH a much larger portion of the SC entered intermediates of the glycolate pathway. Although maximal apparent photosynthesis occurred at pH 7.6 to 7.7, cytoplasmic pH was found to be 8.0 to 8.4, using indicators. The pattern of distribution of "C in intermediates of whole cells was closest to that in chloroplasts at the higher pH range.A number of studies have established the pH for the maximal rate of carbon fixation in cells (15) and in isolated chloroplasts (7, 9, 10). Early experiments of Calvin et al. (6) (14), using Chlorella and Scenedesmus, found substantially higher incorporation of CO, into serine, glycine, and glycolate at pH 8.8 than at pH 7.0.We are not aware, however, of any studies showing the effect of pH on either the intermediates of photosynthesis or the pathway of carbon in isolated chloroplasts. Preliminary work in this laboratory with chloroplast preparations from Acetabularia mediterranea suggested that pH affects the pattern of photosynthetic incorporation of "C into most intermediates of the glycolate pathway and the photosynthetic carbon reduction cycle (F. Winkenbach and R. G. S. Bidwell, unpublished). This paper describes the results of an investigation of the effect of pH on the incorporation of 'CO, into photosynthetic intermediates in these chloroplast preparations.I The authors wish to acknowledge financial assistance from the National Research Council of Canada.'Present address:

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“…Early experiments of Calvin et al (6) (14), using Chlorella and Scenedesmus, found substantially higher incorporation of CO, into serine, glycine, and glycolate at pH 8.8 than at pH 7.0.…”

Section: Introductionmentioning

confidence: 96%

“…Early experiments of Calvin et al (6) indicated that Chlorella cells could withstand major changes in pH of the medium, and that these changes resulted in different patterns of CO. fixation. The incorporation of 'CO.…”

mentioning

confidence: 99%

The Effect of pH on the Products of Photosynthesis in ¹⁴CO₂ by Chloroplast Preparations from Acetabularia mediterranea

Dodd

Bidwell

1971

Plant Physiol.

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“…The C 14 isotope labeling technique to prove that O 2 evolution comes from H 2 O not from CO 2 (Ruben et al, 1939;Ruben and Kamen, 1941;Gest, 1997Gest, , 2005 was another breakthrough. Calvin Melvin and his colleagues published numerous studies highlighting the origin of photosynthesis and stated that CO 2 is fixed into organic structures in cells Benson and Calvin, 1948;Stepka and Benson, 1948;Benson et al, 1949;Calvin, 1949;Badin and Calvin, 1950;Calvin et al, 1950Calvin et al, , 1951. Later named as the CalvineBenson cycle, these studies highlighted the metabolism and pathways of inorganic and organic substances in both plant and microalgae metabolism.…”

Section: Microalgae Evolution From a Simple Food To Fuel Sourcementioning

confidence: 99%

From the Ancient Tribes to Modern Societies, Microalgae Evolution from a Simple Food to an Alternative Fuel Source

Öncel

Köse

Vardar

et al. 2015

Handbook of Marine Microalgae

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“…3-Phosphoglyceric acid.-3-Phosphoglyceric acid (PCA) was found to be the most prominently labeled compound after very short periods of photo synthesis in the presence of 14C02 (3,8). Kinetic studies showed that when the percentage of total radiocarbon fixed was plotted as a function of time of photosynthesis with 14C02, the percentage found in PCA, when extra polated to zero time, was more than 70 percent (2) and in some experiments…”

Section: The Carbon Reduction Cycle In Vivomentioning

confidence: 99%

“…In the PSCR cycle, the first stable carboxylation product is 3-phospho glyceric acid (PGA) (3). All the remaining stable intermediates are sugar phosphates and diphosphates, with carbon skeletons from three to seven carbon atoms in length.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Studies of the Photosynthetic Carbon Reduction Cycle

Bassham¹

1964

Annu. Rev. Plant. Physiol.

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The Path of Carbon in Photosynthesis. X. Carbon Dioxideassimilation in Plants

Cited by 8 publications

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The Effect of pH on the Products of Photosynthesis in ¹⁴CO₂ by Chloroplast Preparations from Acetabularia mediterranea

The Effect of pH on the Products of Photosynthesis in ¹⁴CO₂ by Chloroplast Preparations from Acetabularia mediterranea

From the Ancient Tribes to Modern Societies, Microalgae Evolution from a Simple Food to an Alternative Fuel Source

Kinetic Studies of the Photosynthetic Carbon Reduction Cycle

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The Path of Carbon in Photosynthesis. X. Carbon Dioxideassimilation in Plants

Cited by 8 publications

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The Effect of pH on the Products of Photosynthesis in 14CO2 by Chloroplast Preparations from Acetabularia mediterranea

The Effect of pH on the Products of Photosynthesis in 14CO2 by Chloroplast Preparations from Acetabularia mediterranea

From the Ancient Tribes to Modern Societies, Microalgae Evolution from a Simple Food to an Alternative Fuel Source

Kinetic Studies of the Photosynthetic Carbon Reduction Cycle

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The Effect of pH on the Products of Photosynthesis in ¹⁴CO₂ by Chloroplast Preparations from Acetabularia mediterranea

The Effect of pH on the Products of Photosynthesis in ¹⁴CO₂ by Chloroplast Preparations from Acetabularia mediterranea