Plant Physiol.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Plant Physiology 52:119-123 (1973)
© 1973 American Society of Plant Biologists

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in Web of Science
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Web of Science (95)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Stemler, A.
Right arrow Articles by Govindjee
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Stemler, A.
Right arrow Articles by Govindjee,
Agricola
Right arrow Articles by Stemler, A.
Right arrow Articles by Govindjee,
Articles

Bicarbonate Ion as a Critical Factor in Photosynthetic Oxygen Evolution 1

Alan Stemler and Govindjee

a Department of Botany, University of Illinois, Urbana, Illinois 61801

Bicarbonate ion, not dissolved CO2 gas, is shown to increase 4- to 5-fold the rate of dichlorophenol indophenol reduction by isolated maize (Zea mays) chloroplasts. Glutaraldehyde fixed chloroplasts continue to exhibit bicarbonate-dependent 2,6-dichlorophenol indophenol reduction. Bicarbonate is shown to act close to the oxygen-evolving site, i.e. prior to the electron donation site of diphenyl carbazide to photosystem II. Dark incubation and light pretreatment of chloroplasts in various concentrations of bicarbonate, just prior to assay, indicate that bicarbonate binds to chloroplasts in the dark and is released again as the Hill reaction proceeds in the light. It is suggested that bicarbonate ions may play a critical role in the oxygen-evolving process in photosynthesis.

1 This work was supported by National Science Foundation Grant GB36751 and by the Research Board of the University of Illinois.




This article has been cited by other articles:


Home page
 Proc. Natl. Acad. Sci. USAHome page
G. C. Dismukes, V. V. Klimov, S. V. Baranov, Yu. N. Kozlov, J. DasGupta, and A. Tyryshkin
Special Feature: The origin of atmospheric oxygen on Earth: The innovation of oxygenic photosynthesis
PNAS, February 27, 2001; 98(5): 2170 - 2175.
[Abstract] [Full Text] [PDF]

Home page
 Proc. Natl. Acad. Sci. USAHome page
S. I. Allakhverdiev, I. Yruela, R. Picorel, and V. V. Klimov
Bicarbonate is an essential constituent of the water-oxidizing complex of photosystem II
PNAS, May 13, 1997; 94(10): 5050 - 5054.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
ASPB Publications PLANT PHYSIOLOGY® THE PLANT CELL
Copyright © 1973 by the American Society of Plant Biologists