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. 1974 Feb;53(2):220–223. doi: 10.1104/pp.53.2.220

Further Studies on the Bicarbonate Stimulation of Photophosphorylation in Isolated Chloroplasts 1

William S Cohen a,2, Andre T Jagendorf a
PMCID: PMC541367  PMID: 16658679

Abstract

The bicarbonate effect in stimulating the rate of photophosphorylation by isolated spinach (Spinacia oleracea var. Virginia blight-resistant savoy) chloroplasts at a pH below the optimum has been re-examined. Its seasonal nature may be related to the hormonal status of the plants. Bicarbonate anions stimulate adenosine 5′-triphosphate synthesis if added in the final, adenosine 5′-triphosphate-forming stage of either a postillumination or an acid-base experiment. They also stimulate the membrane-bound, Mg2+-dependent adenosine 5′-triphosphatase of chloroplasts, and the Ca2+-dependent adenosine 5′-triphosphatase of detached coupling factor. These and other data point to the interaction between energized thylakoid membranes and the coupling factor as the probable site of action of bicarbonate anions when they stimulate photophosphorylation.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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