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Leaf day respiration: More than just catabolic CO2 production in the light
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International audience. Summary statement Day respiration is a net flux resulting from several CO 2 ‐generating and CO 2 ‐fixing reactions, not only related to catabolism but also to anabolism. We review pieces of evidence that decarboxylating reactions are partly fed by carbon sources disconnected from current photosynthesis and how they reflect various metabolic pathways.