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. 1969 May;44(5):649–654. doi: 10.1104/pp.44.5.649

Photosynthetic Activity of Chloroplasts Isolated From Bermudagrass (Cynodon dactylon L.), a Species With a High Photosynthetic Capacity 1

T M Chen a, R H Brown a, C C Black Jr a
PMCID: PMC396141  PMID: 16657116

Abstract

Chloroplasts have been isolated from bermudagrass (Cynodon dactylon L.) leaves and assayed for photophosphorylation and electron transport activity. These chloroplasts actively synthesize adenosine triphosphate during cyclic electron flow with phenazine methosulfate and noncyclic electron flow concurrent with the reduction of such Hill oxidants as nicotinamide adenosine dinucleotide phosphate, cytochrome c, and ferricyanide. Apparent Km values for the cofactors of photophosphorylation have been determined to be 5 × 10−5 M for phosphate and 2.5 × 10−5 M for adenosine diphosphate. The influence of light intensity on photophosphorylation has been studied and the molar ratio of cyclic to noncyclic phosphorylation calculated. It is concluded that the high photosynthetic capacity of bermudagrass leaves probably could be supported by the photophosphorylation capacities indicated in these chloroplast studies and the anomalous lack of data in chlorolast studies on the production of sufficient reductant for CO2 assimilation at high light intensities has been noted.

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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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