Nitrate-Dependent O2 Evolution in Intact Leaves
- 1 July 1991
- journal article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 96 (3), 898-901
- https://doi.org/10.1104/pp.96.3.898
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.Keywords
This publication has 8 references indexed in Scilit:
- Nitrate Reduction in Response to CO2-Limited PhotosynthesisPlant Physiology, 1990
- Oxygen and Carbon Dioxide Fluxes from Barley Shoots Depend on Nitrate AssimilationPlant Physiology, 1989
- Changes in Net O2 Exchange Induced by Inorganic Nitrogen in the Blue-Green Alga Anacystis nidulansPlant Physiology, 1989
- Photosynthetic Assimilation of NO3− by Intact Cells of the Cyanobacterium Anacystis nidulansPlant Physiology, 1987
- Simultaneous Measurement of Oxygen Evolution and Chlorophyll Fluorescence from Leaf PiecesPlant Physiology, 1983
- Malate and Dihydroxyacetone Phosphate-dependent Nitrate Reduction in Spinach Leaf ProtoplastsPlant Physiology, 1978
- Generation of Reduced Nicotinamide Adenine Dinucleotide for Nitrate Reduction in Green LeavesPlant Physiology, 1971
- On the photochemical reduction of nitrate by algaeBiochimica et Biophysica Acta, 1953