PMID: 16664797May 1, 1986

Evidence for Cyclic Electron Flow around Photosystem II in Chlorella pyrenoidosa

Plant Physiology
P FalkowskiD Mauzerall


Electron flow around photosystem II was investigated in Chlorella pyrenoidosa. Using a bare platinum O(2) electrode, simultaneous measuremnts were made of steady-state photosynthesis in continuous light, the yield of oxygen (Y(o(2) )) produced by a superimposed saturating xenon flash, and the change in fluorescence yield of a weak flash triggered before and 70 microseconds after the saturating flash. Throughout most of the continuous photosynthesis-irradiance curve, normalized O(2) flash yields (Y(o(2) )/Y(o(2)max)) and normalized variable fluorescence yields (Deltaphi/Deltaphi') were linearly correlated with a slope of 1.0. As photosynthetic rates reached light saturation, however, the variable fluorescence yields remained relatively constant while O(2) flash yields decreased. These results strongly suggest that there is a cyclic electron flow around photosystem II in unpoisoned intact cells at light saturation and supraoptimal light intensities.


May 9, 1979·Biochimica Et Biophysica Acta·J SinclairS Garland
Jan 1, 1969·Biochimica Et Biophysica Acta·C Bonaventura, J Myers
Oct 3, 1980·Biochimica Et Biophysica Acta·R E SlovacekG Hind
Aug 28, 1954·Nature·D I ArnonF R WHATLEY
May 6, 1961·Nature·L N DUYSENSB M KAMP
Jul 1, 1983·Proceedings of the National Academy of Sciences of the United States of America·P A AlbertssonD I Arnon
Jul 1, 1960·Plant Physiology·R Emerson, E Rabinowitch


Mar 1, 1994·Photosynthesis Research·P Falkowski
Jun 1, 1996·Photosynthesis Research·O PrasilP Falkowski
Feb 1, 1990·Photosynthesis Research·O Hansson, T Wydrzynski
Aug 1, 1990·Photosynthesis Research·T Henrysson, C Sundby
Sep 30, 2008·Photosynthesis Research·Alexander G IvanovNorman P A Hüner
Dec 1, 1990·Proceedings of the National Academy of Sciences of the United States of America·O Canaani, M Havaux
Jul 1, 1988·Plant Physiology·P MäenpääE Tyystjärvi
Mar 27, 2013·Annual Review of Biochemistry·David J VinyardG Charles Dismukes
Nov 9, 2010·Biochimica Et Biophysica Acta·Allison E McDonaldNorman P A Hüner
Jul 22, 2006·Biochimica Et Biophysica Acta·W Onno FeikemaHans J van Gorkom
Aug 26, 2011·Biochimica Et Biophysica Acta·Katherine E Shinopoulos, G W Brudvig
Sep 6, 1988·Biochemistry·L K Thompson, G W Brudvig
Aug 1, 1993·Physiologia Plantarum·W A CramerMichel Böttger
May 19, 2019·Proceedings of the National Academy of Sciences of the United States of America·Shai SaroussiArthur Grossman
Feb 27, 2021·Journal of Plant Physiology·Vladimir LysenkoAnastasiya Kunitsina
Jul 24, 2017·Biochimica Et Biophysica Acta. Bioenergetics·Gennady AnanyevG Charles Dismukes
Mar 25, 2015·Biochimica Et Biophysica Acta·Agu LaiskVello Oja

Related Concepts

Trending Feeds


Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Alzheimer's Disease: MS4A

Variants within the membrane-spanning 4-domains subfamily A (MS4A) gene cluster have recently been implicated in Alzheimer's disease in genome-wide association studies. Here is the latest research on Alzheimer's disease and MS4A.

Pediculosis pubis

Pediculosis pubis is a disease caused by a parasitic insect known as Pthirus pubis, which infests human pubic hair, as well as other areas with hair including eye lashes. Here is the latest research.

Rh Isoimmunization

Rh isoimmunization is a potentially preventable condition that occasionally is associated with significant perinatal morbidity or mortality. Discover the latest research on Rh Isoimmunization here.

Genetic Screens in iPSC-derived Brain Cells

Genetic screening is a critical tool that can be employed to define and understand gene function and interaction. This feed focuses on genetic screens conducted using induced pluripotent stem cell (iPSC)-derived brain cells. It also follows CRISPR-Cas9 approaches to generating genetic mutants as a means of understanding the effect of genetics on phenotype.

Enzyme Evolution

This feed focuses on molecular models of enzyme evolution and new approaches (such as adaptive laboratory evolution) to metabolic engineering of microorganisms. Here is the latest research.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Pharmacology of Proteinopathies

This feed focuses on the pharmacology of proteinopathies - diseases in which proteins abnormally aggregate (i.e. Alzheimer’s, Parkinson’s, etc.). Discover the latest research in this field with this feed.

Alignment-free Sequence Analysis Tools

Alignment-free sequence analyses have been applied to problems ranging from whole-genome phylogeny to the classification of protein families, identification of horizontally transferred genes, and detection of recombined sequences. Here is the latest research.