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  Wasteful, essential, evolutionary stepping stone? The multiple personalities of the photorespiratory pathway

Fernie, A. R., & Bauwe, H. (in press). Wasteful, essential, evolutionary stepping stone? The multiple personalities of the photorespiratory pathway. The Plant Journal. doi:10.1111/tpj.14669.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-7692-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-76A7-A
Genre: Journal Article

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Fernie, A. R.1, Author              
Bauwe, Hermann2, Author
Affiliations:
1Central Metabolism, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753339              
2External Organizations, ou_persistent22              

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Free keywords: photorespiration, photosynthesis, 2-phosphoglycolate, repair pathways, engineered pathways, evolution, oxygen, Rubisco
 Abstract: Abstract The photorespiratory pathway, in short photorespiration, is a metabolic repair system that enables the CO2 fixation enzyme Rubisco to sustainably operate in the presence of oxygen, that is, during oxygenic photosynthesis of plants and cyanobacteria. Photorespiration is necessary because an auto-inhibitory metabolite, 2-phosphoglycolate (2PG), is produced when Rubisco binds oxygen instead of CO2 as a substrate and must be removed, to avoid collapse of metabolism, and recycled as efficiently as possible. The basic principle of recycling 2PG very likely evolved several billion years ago in connection with the evolution oxyphotobacteria. It comprises the multi-step combination of two molecules of 2PG to form 3-phosphoglycerate. The biochemistry of this process dictates that one out of four 2PG carbons is lost as CO2, which is a long-standing plant breeders' concern because it represents by far the largest fraction of respiratory processes that reduce gross-photosynthesis of major crops down to about 50% and less, lowering potential yields. In addition to the ATP needed for recycling of the 2PG carbon, extra energy is needed for the refixation of liberated equal amounts of ammonia. It is thought that the energy costs of photorespiration have an additional negative impact on crop yields in at least some environments. This paper discusses recent advances concerning the origin and evolution of photorespiration and gives an overview of contemporary and envisioned strategies to engineer the biochemistry of, or even avoid, photorespiration.

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Language(s): eng - English
 Dates: 2020
 Publication Status: Accepted / In Press
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1111/tpj.14669
BibTex Citekey: doi:10.1111/tpj.14669
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Title: The Plant Journal
  Other : Plant J.
Source Genre: Journal
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Publ. Info: Oxford : Blackwell Science
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISSN: 0960-7412
CoNE: https://pure.mpg.de/cone/journals/resource/954925579095_1