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Plant Photorespiration: A Key Process to Adapt to a Changing...
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Plant Photorespiration: A Key Process to Adapt to a Changing Environment

A special issue of Plants (ISSN 2223-7747).

Deadline for manuscript submissions: closed (15 April 2021) | Viewed by 18754

Special Issue Editors

Dr. Marco Betti

E-Mail Website
Guest Editor
Plant Biochemistry and Molecular Biology Department, University of Seville, 41004 Seville, Spain
Interests: nitrogen metabolism; photorespiration; legume molecular genetics; abiotic stress; transcriptomics; plant phenolic compounds
Special Issues, Collections and Topics in MDPI journals
Dr. Stefan Timm

E-Mail Website
Guest Editor
Plant Physiology Department, Albert-Einstein-Str.3, 18059 Rostock, Germany
Interests: photorespiration; photosynthesis; Calvin–Benson cycle; metabolic regulation; metabolite signaling; environmental acclimation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Photorespiration is a complex metabolic pathway, which requires a high amount of ATP and reducing power. For this reason, photorespiration has a dramatic impact on plant performance. Several factors can influence the rate of photorespiration, especially atmospheric CO2 concentration, temperature, and water availability. All these factors are going to change in the future according to the current climate change models, and changes in the photorespiratory rate will have a major impact on crop yield. Moreover, plants that depend on nitrate as their main nitrogen source depend on photorespiration in order to assimilate it.

While the main enzymes of photorespiration have been discovered thanks to the isolation of specific mutants, several key transporters are still missing, and the regulation of the pathway, both at the transcriptional and post-translational levels, and the interactions of photorespiration with other metabolic pathways are all topics that need further research. This Special Issue will mainly focused on but is not restricted to the biochemistry, molecular genetics, and regulation of photorespiration, and the link between photorespiration and plant productivity. Contributions that take into consideration the interaction of factors such as raising atmospheric CO2 concentration; different abiotic stress conditions such as drought, temperature, and salinity; and approaches aimed to manipulate photorespiration for better plant performance will be also welcome. Both research papers and reviews related to these items will be considered for publication.

Dr. Marco Betti
Dr. Stefan Timm
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Plants is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Photorespiration
  • Atmospheric CO2
  • Abiotic stress
  • Climate change
  • Photorespiratory mutants
  • Metabolic interactions
  • Crop yield
  • Plant biotechnology

Published Papers (4 papers)

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Research

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15 pages, 4063 KiB  
Article
Modulation of Photorespiratory Enzymes by Oxidative and Photo-Oxidative Stress Induced by Menadione in Leaves of Pea (Pisum sativum)
by Ramesh B. Bapatla, Deepak Saini, Vetcha Aswani, Pidakala Rajsheel, Bobba Sunil, Stefan Timm and Agepati S. Raghavendra
Plants 2021, 10(5), 987; https://0-doi-org.brum.beds.ac.uk/10.3390/plants10050987 - 15 May 2021
Cited by 10 | Viewed by 2832
Abstract
Photorespiration, an essential component of plant metabolism, is concerted across four subcellular compartments, namely, chloroplast, peroxisome, mitochondrion, and the cytoplasm. It is unclear how the pathway located in different subcellular compartments respond to stress occurring exclusively in one of those. We attempted to [...] Read more.
Photorespiration, an essential component of plant metabolism, is concerted across four subcellular compartments, namely, chloroplast, peroxisome, mitochondrion, and the cytoplasm. It is unclear how the pathway located in different subcellular compartments respond to stress occurring exclusively in one of those. We attempted to assess the inter-organelle interaction during the photorespiratory pathway. For that purpose, we induced oxidative stress by menadione (MD) in mitochondria and photo-oxidative stress (high light) in chloroplasts. Subsequently, we examined the changes in selected photorespiratory enzymes, known to be located in other subcellular compartments. The presence of MD upregulated the transcript and protein levels of five chosen photorespiratory enzymes in both normal and high light. Peroxisomal glycolate oxidase and catalase activities increased by 50% and 25%, respectively, while chloroplastic glycerate kinase and phosphoglycolate phosphatase increased by ~30%. The effect of MD was maximum in high light, indicating photo-oxidative stress was an influential factor to regulate photorespiration. Oxidative stress created in mitochondria caused a coordinative upregulation of photorespiration in other organelles. We provided evidence that reactive oxygen species are important signals for inter-organelle communication during photorespiration. Thus, MD can be a valuable tool to modulate the redox state in plant cells to study the metabolic consequences across membranes. Full article
(This article belongs to the Special Issue Plant Photorespiration: A Key Process to Adapt to a Changing Environment)
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Review

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18 pages, 2644 KiB  
Review
Photorespiration: The Futile Cycle?
by Xiaoxiao Shi and Arnold Bloom
Plants 2021, 10(5), 908; https://0-doi-org.brum.beds.ac.uk/10.3390/plants10050908 - 01 May 2021
Cited by 32 | Viewed by 8456
Abstract
Photorespiration, or C2 photosynthesis, is generally considered a futile cycle that potentially decreases photosynthetic carbon fixation by more than 25%. Nonetheless, many essential processes, such as nitrogen assimilation, C1 metabolism, and sulfur assimilation, depend on photorespiration. Most studies of photosynthetic and [...] Read more.
Photorespiration, or C2 photosynthesis, is generally considered a futile cycle that potentially decreases photosynthetic carbon fixation by more than 25%. Nonetheless, many essential processes, such as nitrogen assimilation, C1 metabolism, and sulfur assimilation, depend on photorespiration. Most studies of photosynthetic and photorespiratory reactions are conducted with magnesium as the sole metal cofactor despite many of the enzymes involved in these reactions readily associating with manganese. Indeed, when manganese is present, the energy efficiency of these reactions may improve. This review summarizes some commonly used methods to quantify photorespiration, outlines the influence of metal cofactors on photorespiratory enzymes, and discusses why photorespiration may not be as wasteful as previously believed. Full article
(This article belongs to the Special Issue Plant Photorespiration: A Key Process to Adapt to a Changing Environment)
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15 pages, 859 KiB  
Review
Transport Proteins Enabling Plant Photorespiratory Metabolism
by Franziska Kuhnert, Urte Schlüter, Nicole Linka and Marion Eisenhut
Plants 2021, 10(5), 880; https://0-doi-org.brum.beds.ac.uk/10.3390/plants10050880 - 27 Apr 2021
Cited by 7 | Viewed by 3561
Abstract
Photorespiration (PR) is a metabolic repair pathway that acts in oxygenic photosynthetic organisms to degrade a toxic product of oxygen fixation generated by the enzyme ribulose 1,5-bisphosphate carboxylase/oxygenase. Within the metabolic pathway, energy is consumed and carbon dioxide released. Consequently, PR is seen [...] Read more.
Photorespiration (PR) is a metabolic repair pathway that acts in oxygenic photosynthetic organisms to degrade a toxic product of oxygen fixation generated by the enzyme ribulose 1,5-bisphosphate carboxylase/oxygenase. Within the metabolic pathway, energy is consumed and carbon dioxide released. Consequently, PR is seen as a wasteful process making it a promising target for engineering to enhance plant productivity. Transport and channel proteins connect the organelles accomplishing the PR pathway—chloroplast, peroxisome, and mitochondrion—and thus enable efficient flux of PR metabolites. Although the pathway and the enzymes catalyzing the biochemical reactions have been the focus of research for the last several decades, the knowledge about transport proteins involved in PR is still limited. This review presents a timely state of knowledge with regard to metabolite channeling in PR and the participating proteins. The significance of transporters for implementation of synthetic bypasses to PR is highlighted. As an excursion, the physiological contribution of transport proteins that are involved in C4 metabolism is discussed. Full article
(This article belongs to the Special Issue Plant Photorespiration: A Key Process to Adapt to a Changing Environment)
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Other

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12 pages, 2111 KiB  
Technical Note
13C Isotope Labelling to Follow the Flux of Photorespiratory Intermediates
by Cyril Abadie and Guillaume Tcherkez
Plants 2021, 10(3), 427; https://0-doi-org.brum.beds.ac.uk/10.3390/plants10030427 - 24 Feb 2021
Cited by 7 | Viewed by 2311
Abstract
Measuring the carbon flux through metabolic pathways in intact illuminated leaves remains challenging because of, e.g., isotopic dilution by endogenous metabolites, the impossibility to reach isotopic steady state, and the occurrence of multiple pools. In the case of photorespiratory intermediates, our knowledge of [...] Read more.
Measuring the carbon flux through metabolic pathways in intact illuminated leaves remains challenging because of, e.g., isotopic dilution by endogenous metabolites, the impossibility to reach isotopic steady state, and the occurrence of multiple pools. In the case of photorespiratory intermediates, our knowledge of the partitioning between photorespiratory recycling, storage, and utilization by other pathways is thus rather limited. There has been some controversy as to whether photorespiratory glycine and serine may not be recycled, thus changing the apparent stoichiometric coefficient between photorespiratory O2 fixation and CO2 release. We describe here an isotopic method to trace the fates of glycine, serine and glycerate, taking advantage of positional 13C content with NMR and isotopic analyses by LC–MS. This technique is well-adapted to show that the proportion of glycerate, serine and glycine molecules escaping photorespiratory recycling is very small. Full article
(This article belongs to the Special Issue Plant Photorespiration: A Key Process to Adapt to a Changing Environment)
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