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. 1991 Jul;96(3):898–901. doi: 10.1104/pp.96.3.898

Nitrate-Dependent O2 Evolution in Intact Leaves 1

Angel de la Torre 1,2, Begoña Delgado 1,2, Catalina Lara 1,2
PMCID: PMC1080862  PMID: 16668272

Abstract

Evolution of O2 by illuminated intact detached leaves from barley (Hordeum vulgare L. cv Athos) and pea (Pisum sativum L. cv Lincoln) in a CO2-saturating atmosphere was enhanced when KNO3 (1-2.5 millimolar) had been previously supplied through the transpiration stream. The extra O2 evolution observed after feeding KNO3 increased with the light intensity, being maximal at near saturating photon flux densities and resulting in no changes in the initial slope of the O2 versus light-intensity curve. No stimulation of O2 evolution was otherwise observed after feeding KCl or NH4Cl. The data indicate that nitrate assimilation uses photosynthetically generated reductant and stimulates the rate of non-cyclic electron flow by acting as a second electron-accepting assimilatory process in addition to CO2 fixation.

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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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