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Metabolites
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Photorespiration on Plant Metabolism
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Photorespiration on Plant Metabolism

A special issue of Metabolites (ISSN 2218-1989). This special issue belongs to the section "Plant Metabolism".

Deadline for manuscript submissions: closed (31 August 2021) | Viewed by 5994

Special Issue Editor

Dr. Mathieu Jossier

E-Mail Website
Guest Editor
The Institute of Plant Sciences Paris-Saclay, Gif-sur-Yvette, France
Interests: photorespiration; primary metabolism; phosphorylation; metabolism regulation

Special Issue Information

Dear Colleagues,

Photorespiration has been experiencing a strong revival of interest for the last ten years, and for good reason, as it is a metabolic pathway inherent to photosynthesis, strongly influenced by climate change and which in turn can greatly affect photosynthesis. Photorespiration is a complex cycle involving eight enzymes distributed in four cellular compartments: chloroplast, peroxisome, mitochondrion, and cytosol. Photorespiration is not limited to the recycling function of 2-phosphoglycolate since it is involved in various processes such as resistance to biotic and abiotic stresses. It can affect the functioning of the Krebs cycle, amino acid metabolism, nitrogen assimilation, C1 metabolism, and photosynthetic electron transfer. Thus, this Special Issue is devoted to the study of the impact of photorespiration on plant metabolism under stress- and non-stress conditions in order to understand the interconnections of photorespiration with the rest of the plant metabolism.

Dr. Mathieu Jossier
Guest Editor

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. Metabolites is an international peer-reviewed open access monthly 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

  • Plant
  • Photorespiration
  • Metabolism
  • Metabolome
  • Enzyme regulation
  • Gene expression

Published Papers (2 papers)

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Research

19 pages, 7408 KiB  
Article
The Impact of Photorespiratory Glycolate Oxidase Activity on Arabidopsis thaliana Leaf Soluble Amino Acid Pool Sizes during Acclimation to Low Atmospheric CO2 Concentrations
by Younès Dellero, Caroline Mauve, Mathieu Jossier and Michael Hodges
Metabolites 2021, 11(8), 501; https://0-doi-org.brum.beds.ac.uk/10.3390/metabo11080501 - 30 Jul 2021
Cited by 7 | Viewed by 2384
Abstract
Photorespiration is a metabolic process that removes toxic 2-phosphoglycolate produced by the oxygenase activity of ribulose-1,5-bisphosphate carboxylase/oxygenase. It is essential for plant growth under ambient air, and it can play an important role under stress conditions that reduce CO2 entry into the [...] Read more.
Photorespiration is a metabolic process that removes toxic 2-phosphoglycolate produced by the oxygenase activity of ribulose-1,5-bisphosphate carboxylase/oxygenase. It is essential for plant growth under ambient air, and it can play an important role under stress conditions that reduce CO2 entry into the leaf thus enhancing photorespiration. The aim of the study was to determine the impact of photorespiration on Arabidopsis thaliana leaf amino acid metabolism under low atmospheric CO2 concentrations. To achieve this, wild-type plants and photorespiratory glycolate oxidase (gox) mutants were given either short-term (4 h) or long-term (1 to 8 d) low atmospheric CO2 concentration treatments and leaf amino acid levels were measured and analyzed. Low CO2 treatments rapidly decreased net CO2 assimilation rate and triggered a broad reconfiguration of soluble amino acids. The most significant changes involved photorespiratory Gly and Ser, aromatic and branched-chain amino acids as well as Ala, Asp, Asn, Arg, GABA and homoSer. While the Gly/Ser ratio increased in all Arabidopsis lines between air and low CO2 conditions, low CO2 conditions led to a higher increase in both Gly and Ser contents in gox1 and gox2.2 mutants when compared to wild-type and gox2.1 plants. Results are discussed with respect to potential limiting enzymatic steps with a special emphasis on photorespiratory aminotransferase activities and the complexity of photorespiration. Full article
(This article belongs to the Special Issue Photorespiration on Plant Metabolism)
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21 pages, 6014 KiB  
Article
Metabolite Profiling in Arabidopsisthaliana with Moderately Impaired Photorespiration Reveals Novel Metabolic Links and Compensatory Mechanisms of Photorespiration
by Stefan Timm, Adriano Nunes-Nesi, Alexandra Florian, Marion Eisenhut, Katja Morgenthal, Markus Wirtz, Rüdiger Hell, Wolfram Weckwerth, Martin Hagemann, Alisdair R. Fernie and Hermann Bauwe
Metabolites 2021, 11(6), 391; https://0-doi-org.brum.beds.ac.uk/10.3390/metabo11060391 - 15 Jun 2021
Cited by 15 | Viewed by 2987
Abstract
Photorespiration is an integral component of plant primary metabolism. Accordingly, it has been often observed that impairing the photorespiratory flux negatively impacts other cellular processes. In this study, the metabolic acclimation of the Arabidopsisthaliana wild type was compared with the hydroxypyruvate reductase [...] Read more.
Photorespiration is an integral component of plant primary metabolism. Accordingly, it has been often observed that impairing the photorespiratory flux negatively impacts other cellular processes. In this study, the metabolic acclimation of the Arabidopsisthaliana wild type was compared with the hydroxypyruvate reductase 1 (HPR1; hpr1) mutant, displaying only a moderately reduced photorespiratory flux. Plants were analyzed during development and under varying photoperiods with a combination of non-targeted and targeted metabolome analysis, as well as 13C- and 14C-labeling approaches. The results showed that HPR1 deficiency is more critical for photorespiration during the vegetative compared to the regenerative growth phase. A shorter photoperiod seems to slowdown the photorespiratory metabolite conversion mostly at the glycerate kinase and glycine decarboxylase steps compared to long days. It is demonstrated that even a moderate impairment of photorespiration severely reduces the leaf-carbohydrate status and impacts on sulfur metabolism. Isotope labeling approaches revealed an increased CO2 release from hpr1 leaves, most likely occurring from enhanced non-enzymatic 3-hydroxypyruvate decarboxylation and a higher flux from serine towards ethanolamine through serine decarboxylase. Collectively, the study provides evidence that the moderate hpr1 mutant is an excellent tool to unravel the underlying mechanisms governing the regulation of metabolic linkages of photorespiration with plant primary metabolism. Full article
(This article belongs to the Special Issue Photorespiration on Plant Metabolism)
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