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. 1977 May;59(5):936-40.
doi: 10.1104/pp.59.5.936.

Photosynthesis and photorespiration in algae

N D Lloyd  1 , D T Canvin, D A Culver
Affiliations

Photosynthesis and photorespiration in algae

N D Lloyd et al. Plant Physiol. 1977 May.

Abstract

The CO(2) exchange of several species of fresh water and marine algae was measured in the laboratory to determine whether photorespiration occurs in these organisms. The algae were positioned as thin layers on filter paper and the CO(2) exchange determined in an open gas exchange system. In either 21 or 1% O(2) there was little difference between (14)CO(2) and (12)CO(2) uptake. Apparent photosynthesis was the same in 2, 21, or 50% O(2). The compensation points of all algae were less than 10 mul 1(-1). CO(2) or (14)CO(2) evolution into CO(2)-free air in the light was always less than the corresponding evolution in darkness. These observations are inconsistent with the proposal that photorespiration exists in these algae.

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References

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