Skip Navigation



Plant and Cell Physiology Advance Access published online on January 8, 2009
Plant and Cell Physiology, doi:10.1093/pcp/pcn204
This Article
Right arrow Advance Access manuscript (PDF)
Right arrow All Versions of this Article:
50/2/374    most recent
pcn204v1
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 PubMed
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 Domonkos, I.
Right arrow Articles by Gombos, Z.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Domonkos, I.
Right arrow Articles by Gombos, Z.
Agricola
Right arrow Articles by Domonkos, I.
Right arrow Articles by Gombos, Z.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© The Author 2009. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org

Phosphatidylglycerol depletion induces an increase in myxoxanthophyll biosynthetic activity in Synechocystis PCC6803 cells

Ildiko Domonkos1, Przemyslaw Malec2, Hajnalka Laczko-Dobos1, Ozge Sozer1, Kinga Klodawska2, Hajime Wada3, Kazimierz Strzalka2 and Zoltan Gombos1

1Institute of Plant Biology, Biological Research Center, Hungarian Academy of Sciences, H-6701 Szeged, Hungary
2Department of Plant Physiology and Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, PL-30-387 Krakow, Poland
3Department of Life Sciences, Graduate School of Arts and Sciences, University of Tokyo, Komaba, Tokyo 153-8902, Japan

Corresponding author: Prof. Zoltan Gombos, Biological Research Center, Hungarian Academy of Sciences Hungary, E-mail: gombos.zoltan{at}gmail.com


  Abstract

Phosphatidylglycerol (PG) depletion suppressed the oxygen-evolving activity of Synechocystis PCC6803 pgsA mutant cells. Shortage of PG led to decreased photosynthetic activity, which, similar to the effect of high-light exposure, is likely to generate the production of reactive oxygen species (ROS) or free radicals. Protection of the PG-depleted cells against light-induced damage increased the echinenone and myxoxanthophyll content of the cells. The increased carotenoid content was localized in a soluble fraction of the cells as well as in isolated thylakoid and cytoplasmic membranes. The soluble carotenoid fraction contained carotene derivatives, which may bind to proteins. These carotene-protein complexes are similar to orange carotenoid protein that is involved in yielding protection against free radicals and ROS. Increase in the content of myxoxanthophyll and echinenone upon PG depletion suggests that PG depletion regulates the biosynthetic pathway of specific carotenoids.

Keywords: carotenoids - myxoxanthophyll - PG depletion - photosynthesis - protection - Synechocystis PCC6803

(Received October 30, 2008; Accepted December 24, 2008)
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.