Interactions Between Day Respiration, Photorespiration, and N and S Assimilation in Leaves

Cyril Abadie, Adam Carroll, Guillaume Tcherkez

    Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

    Abstract

    Respiration of illuminated leaves (day respiration) represents a minor carbon flux as compared to photosynthesis and photorespiration under usual gaseous conditions. However, it is crucial for leaf primary metabolism, since it sustains N assimilation and provides ATP that can be used for sucrose synthesis in the light. Although available data on interactions between photosynthesis, photorespiration, respiration, and nutrient assimilation are still rather limited, recent works taking advantage of isotopic labeling and metabolomics suggest that changes in photosynthetic and photorespiratory conditions (or the carboxylation-to-oxygenation ratio, v c /v o ) influence N assimilation, S incorporation into methionine, and possibly, displace the equilibrium between C1-metabolites. The crossroad of all of these pathways is mitochondrial metabolism. Therefore, day respiration is probably of considerable importance not only for nutrient assimilation but also for cellular metabolic coordination. This view agrees with data obtained in respiratory mutants.
    Original languageEnglish
    Title of host publicationPlant Respiration: Metabolic Fluxes and Carbon Balance
    EditorsGuillaume Tcherkez and Jaleh Ghashghaie
    Place of PublicationSwitzerland
    PublisherSpringer International Publishing AG
    Pages1-18
    Volume43
    ISBN (Print)978-3-319-68701-8
    DOIs
    Publication statusPublished - 2017

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