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Formate as an Inhibitor of Photosynthetic Electron Flow

Author:
Snel, Jan F. H., Naber, Dirk, Rensen, Jack J. S. van
Source:
Zeitschrift für Naturforschung 2014 v.39 no.5 pp. 386-388
ISSN:
1865-7125
Subject:
Pisum sativum, bicarbonates, chloroplasts, electron transfer, formates, lighting, peas, photosynthesis
Abstract:
The effects of formate on the Hill reaction in isolated broken pea chloroplasts were in­vestigated. Addition of formate to chloroplasts has two distinct effects: I. basal electron flow can be stimulated 3-fold; 2. uncoupled electron flow is inhibited. The stimulating effect is due to uncoupling by formate and appears instantaneous. Maximal inhibition by form ate is only observed after prolonged illumination. The inhibitory action of form ate on electron flow can be relieved by bicarbonate *.
Agid:
5227221