Skip Navigation

This Article
Right arrow Full Text (PDF)
Right arrow E-letters: Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when E-letters are posted
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 Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Right arrow Disclaimer
Google Scholar
Right arrow Articles by RAVEN, J. A.
Right arrow Search for Related Content
PubMed
Right arrow Articles by RAVEN, J. A.
Agricola
Right arrow Articles by RAVEN, J. A.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© 1974 Oxford University Press

RESEARCH-ARTICLE

Energetics of Active Phosphate Influx in Hydrodictyon africanum

J. A. RAVEN

Department of Biological Sciences, University of Dundee Dundee, DD1 4HN
Botany School Downing Street, Cambridge

The energy source for active phosphate influx in Hydrodictyon africanum has been investigated using gas mixtures with and without O2 and CO2, light of various wavelengths, and metabolic inhibitors selective for respiratory or photosynthetic electron transport and phosphorylation. It is concluded that, as in the other green algae studied, active phosphate transport requires ATP. In the dark this is supplied by oxidative phosphorylation; in the light the influx is much less sensitive to inhibition of oxidative phosphorylation, and photophosphorylation (including cyclic photophosphorylation) can act as energy source. This situation is more like that for active K influx (coupled to active Na efflux) than to active Cl influx in H. africanum, except that the active dark influx is relatively greater for phosphate influx. The significance of these results for the mechanism of regulation of light-stimulated ATP-requiring processes, and for the role of photosynthetic and oxidative phosphorylation in the energy metabolism of green cells, is discussed.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.