Home | My Profile | Contact Us
Research Trends Products  |   order gateway  |   author gateway  |   editor gateway  
Register | Forgot Password

Author Resources
 Author Gateway
 Article submission guidelines

Editor Resources
 Editor/Referee Gateway

 Regional Subscription Agents/Distributors
Trends in Photochemistry & Photobiology   Volumes    Volume 16 
Retrograde operational sensing and signalling pathways maintain photostasis in green algae, cyanobacteria and terrestrial plants
Lauren Hollis, Norman P. A. Hüner
Pages: 47 - 61
Number of pages: 15
Trends in Photochemistry & Photobiology
Volume 16 

Copyright © 2014 Research Trends. All rights reserved

The balance in cellular energy flow between the energy source and metabolic sinks is termed photostasis. An imbalance in energy flow may be a consequence of the cumulative impact of changes in either, or both, light and temperature and is sensed by photoautotrophs as a change in excitation pressure, a measure of the relative redox state of quinone A of photosystem II reaction centres which reflects the reduction state of the intersystem electron transport chain. Changes in excitation pressure constitute an ‘operational’ retrograde redox signal which mediates changes in nuclear and plastid gene expression required to optimize photosynthesis and avoid the oxidative damage associated with excessive light energy absorption during abiotic stress. Restructuring of the photosynthetic apparatus in response to environmental change is accomplished by the coordination of retrograde operational signalling pathways with the photoreceptor-mediated sensing and signalling pathways which regulate chloroplast biogenesis and photomorphogenesis. Phenotypic and photosynthetic responses to abiotic stresses in green algae, cyanobacteria and terrestrial plants are compared with respect to acclimation to excitation pressure.
View Full Article  


Buy this article
Buy this volume
Subscribe to this title
Shopping Cart

Quick Links
Search Products
Browse in Alphabetical Order : Journals
Browse by Subject Classification : Journals

Ordering Information Ordering Information
Downloadable forms Downloadable Forms