Photorespiration: Pathways, Regulation, and Modification

Photorespiration: Pathways, Regulation, and Modification Control of photorespiration has emerged as a primary objective in efforts to increase plant productivity in those crops possessing the C3 pathway of photo­ synthesis. Recent progress in characterizing photorespiration and its regulation has identified the target site for modifying this process and provided explicit The US Government has the right to retain a nonexclusive royalty-free license in and to any copyright covering this paper. OGREN approaches which in principle can create and select for plant strains with reduced photorespiration rates. This article reviews those aspects of the subject areas which are most important in understanding the rationale behind these approaches and in evaluating the probability that such approaches will be successful. The earliest report of what we now know to be a manifestation of photorespi­ ratory activity was made by Warburg, who observed O2 inhibition of CO2 fixation in Chlorella (128). A second manifestation of photorespiration, Oz­ stimulated CO2 evolution in the light, was found by Decker (35). The sum effect of these two O2 effects on net photosynthesis can be estimated by comparing photosynthesis rates at 34 0 J.LLlL CO2 in 21% O2 with those observed in 2% O2, In 2% O2, net photosynthesis in C3 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Annual Review of Plant Biology Annual Reviews

Photorespiration: Pathways, Regulation, and Modification

Annual Review of Plant Biology, Volume 35 (1) – Jun 1, 1984

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Publisher
Annual Reviews
Copyright
Copyright 1984 Annual Reviews. All rights reserved
Subject
Review Articles
ISSN
1040-2519
D.O.I.
10.1146/annurev.pp.35.060184.002215
Publisher site
See Article on Publisher Site

Abstract

Control of photorespiration has emerged as a primary objective in efforts to increase plant productivity in those crops possessing the C3 pathway of photo­ synthesis. Recent progress in characterizing photorespiration and its regulation has identified the target site for modifying this process and provided explicit The US Government has the right to retain a nonexclusive royalty-free license in and to any copyright covering this paper. OGREN approaches which in principle can create and select for plant strains with reduced photorespiration rates. This article reviews those aspects of the subject areas which are most important in understanding the rationale behind these approaches and in evaluating the probability that such approaches will be successful. The earliest report of what we now know to be a manifestation of photorespi­ ratory activity was made by Warburg, who observed O2 inhibition of CO2 fixation in Chlorella (128). A second manifestation of photorespiration, Oz­ stimulated CO2 evolution in the light, was found by Decker (35). The sum effect of these two O2 effects on net photosynthesis can be estimated by comparing photosynthesis rates at 34 0 J.LLlL CO2 in 21% O2 with those observed in 2% O2, In 2% O2, net photosynthesis in C3

Journal

Annual Review of Plant BiologyAnnual Reviews

Published: Jun 1, 1984

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