Skip Navigation

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 Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Satoh, K.
Right arrow Articles by Katoh, S.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Satoh, K.
Right arrow Articles by Katoh, S.
Agricola
Right arrow Articles by Satoh, K.
Right arrow Articles by Katoh, S.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Plant and Cell Physiology, 1977, Vol. 18, No. 5 1077-1087
© 1977

Article

Parallel time courses of electrochromic shifts of carotenoids and cytochrome f photooxidation in intact Bryopsis chloroplasts

Kazuhiko Satoh and Sakae Katoh

Department of Pure and Applied Sciences, College of General Education, University of Tokyo Komaba, Meguroku, Tokyo, Japan

Light-induced absorbance changes at 560 nm, and electrochromic shifts in absorption of carotenoids responding to membrane potential across the thylakoid membrane, were studied, comparing them with the kinetics of cytochrome f photooxidation, in the dark-adapted intact chloroplasts of the green alga Bryopis maxima. The 560 nm changes showed transient variations, characterized by a sharp initial peak followed by a second, lower peak, within a few seconds of illumination. The time course of the 560 nm changes is parallel to that of light-induced transient changes of cytochrome f. Inhibitors and redox substances which selectively influenced different transient phases of the cytochrome f induction also specifically affected corresponding transient phases of the 560 nm changes. These results indicate that the two induction phenomena are closely related to each other and that the induction of the 560 nm change is due to light-dependent changes in electron transfer on the reducing side of photosystem I. A possible mechanism for the electric field formation by electron transfer associated with photosystem I will be discussed.

(Received May 9, 1977; )
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.