| Respiratory metabolism of illuminated leaves depends on CO2 and O2 conditions. | |
| | |
MedLine Citation:
|
PMID: 18184808 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Day respiration is the process by which nonphotorespiratory CO2 is produced by illuminated leaves. The biological function of day respiratory metabolism is a major conundrum of plant photosynthesis research: because the rate of CO2 evolution is partly inhibited in the light, it is viewed as either detrimental to plant carbon balance or necessary for photosynthesis operation (e.g., in providing cytoplasmic ATP for sucrose synthesis). Systematic variations in the rate of day respiration under contrasting environmental conditions have been used to elucidate the metabolic rationale of respiration in the light. Using isotopic techniques, we show that both glycolysis and the tricarboxylic acid cycle activities are inversely related to the ambient CO2/O2 ratio: day respiratory metabolism is enhanced under high photorespiratory (low CO2) conditions. Such a relationship also correlates with the dihydroxyacetone phosphate/Glc-6-P ratio, suggesting that photosynthetic products exert a control on day respiration. Thus, day respiration is normally inhibited by phosphoryl (ATP/ADP) and reductive (NADH/NAD) poise but is up-regulated by photorespiration. Such an effect may be related to the need for NH2 transfers during the recovery of photorespiratory cycle intermediates. |
| | |
Authors:
|
Guillaume Tcherkez; Richard Bligny; Elizabeth Gout; Aline Mahé; Michael Hodges; Gabriel Cornic |
Related Documents
:
|
22844038 - Impact of ethnicity upon cardiovascular adaptation in competitive athletes: relevance t... 17669738 - Increased photosynthesis following partial defoliation of field-grown eucalyptus globul... 6429108 - Vagal control of respiratory pattern during hyperpnea in domestic fowl. 11950148 - Is ventilatory acclimatization to hypoxia a phenomenon that arises through mechanisms t... 7760608 - Prevention of atelectasis during general anaesthesia. 6542498 - Effects of exercise-training and detraining on fat cell lipolysis in men and women. |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2008-01-09 |
Journal Detail:
|
Title: Proceedings of the National Academy of Sciences of the United States of America Volume: 105 ISSN: 1091-6490 ISO Abbreviation: Proc. Natl. Acad. Sci. U.S.A. Publication Date: 2008 Jan |
Date Detail:
|
Created Date: 2008-01-16 Completed Date: 2008-02-06 Revised Date: 2010-09-22 |
Medline Journal Info:
|
Nlm Unique ID: 7505876 Medline TA: Proc Natl Acad Sci U S A Country: United States |
Other Details:
|
Languages: eng Pagination: 797-802 Citation Subset: IM |
Affiliation:
|
Plateforme Métabolisme-Métabolome, Institut Fédératif de Recherche 87, Bâtiment 630, 91405 Orsay Cedex, France. guillaume.tcherkez@u-psud.fr |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adenosine Diphosphate
/
chemistry Adenosine Triphosphate / chemistry Carbon Dioxide / metabolism* Carbon Isotopes / chemistry Cluster Analysis Gene Expression Regulation, Plant* Glycolysis Light Magnetic Resonance Spectroscopy Oxygen / metabolism* Oxygen Consumption* Phosphorylation Photosynthesis Plant Leaves / metabolism* Plant Physiological Phenomena |
| Chemical | |
Reg. No./Substance:
|
0/Carbon Isotopes; 124-38-9/Carbon Dioxide; 56-65-5/Adenosine Triphosphate; 58-64-0/Adenosine Diphosphate; 7782-44-7/Oxygen |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Preferred side-chain constellations at antiparallel coiled-coil interfaces.
Next Document: Activation of the hypoxia-inducible factor-1alpha pathway accelerates bone regeneration.