Quantum efficiency of photosynthetic energy conversion.
Open Access
- 1 August 1977
- journal article
- research article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 74 (8) , 3377-3381
- https://doi.org/10.1073/pnas.74.8.3377
Abstract
The quantum efficiency of photosynthetic energy conversion was investigated in isolated spinach chloroplasts by measurements of the quantum requirements of ATP formation by cyclic and noncyclic photophosphorylation catalyzed by ferredoxin. ATP formation had a requirement of about 2 quanta per 1 ATP at 715 nm (corresponding to a requirement of 1 quantum per electron) and a requirement of 4 quanta per ATP (corresponding to a requirement of 2 quanta per electron) at 554 nm. When cyclic and noncyclic photophosphorylation were operating concurrently at 554 nm, a total of about 12 quanta was required to generate the two NADPH and three ATP needed for the assimilation of one CO2 to the level of glucose.This publication has 37 references indexed in Scilit:
- A stable and easily extractable plant-type ferredoxin from the blue-green alga Spirulina maximaBiochemical and Biophysical Research Communications, 1972
- Pigment systems and electron transport in chloroplasts I. Quantum requirements for the two light reactions in spinach chloroplastsBiochimica et Biophysica Acta (BBA) - Bioenergetics, 1971
- Wavelength-dependent quantum yield of ATP synthesis and NADP reduction in normal and dichlorodimethylphenylurea-poisoned chloroplastBiochimica et Biophysica Acta (BBA) - Bioenergetics, 1967
- The photosynthetic energy conversion process in isolated chloroplastsCellular and Molecular Life Sciences, 1966
- Light effects on oxygen evolution and phosphorylation in spinach chloroplastsBiochimica et Biophysica Acta (BBA) - Biophysics including Photosynthesis, 1965
- Action spectra and quantum yields for nicotinamide-adenine dinucleotide phosphate reduction by chloroplastsBiochimica et Biophysica Acta (BBA) - Biophysics including Photosynthesis, 1965
- Separation of Light and Dark Phases in the Photosynthesis of Isolated ChloroplastsNature, 1958
- Photosynthesis by isolated chloroplasts V. Phosphorylation and carbon dioxide fixation by broken chloroplastsBiochimica et Biophysica Acta, 1956
- Transient Changes in Cellular Gas Exchange and the Problem of Maximum Efficiency of PhotosynthesisPlant Physiology, 1955
- Quantum requirement in photosynthesis related to respirationBiochimica et Biophysica Acta, 1955