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. 1993 Oct;103(2):649–660. doi: 10.1104/pp.103.2.649

Changes in P-700 Oxidation during the Early Stages of the Induction of Photosynthesis.

J Harbinson 1, C L Hedley 1
PMCID: PMC159026  PMID: 12231970

Abstract

Following dark adaptation, the response to irradiance of chlorophyll (Chl) fluorescence, the light-induced absorbance change around 820 nm (to measure reaction center Chl of photosystem I [PSI] P-700 oxidation), and CO2 fixation were examined in pea (Pisum sativum L.) leaves under a range of conditions. Initially, P-700 oxidation is restricted by a lack of regeneration of PSI electron acceptors, and the increase of oxidized P-700 (P-700+) that occurs during approximately the first 60 s of irradiation is largely independent of the resistance to electron flow between the two photosystems. Under these conditions, the quantum efficiency for linear electron flow is directly positively related to P-700+ accumulation, which is in contrast to the direct negative correlation that is the most frequently reported relationship between P-700+ accumulation and the quantum efficiency for linear electron flow.

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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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