Findings highlight phloem cells' contributions to leaf respiration, suggesting a need to reconsider their role in plant physiology.
Summary statement The role played by phloem metabolic activity including loading is often neglected in leaf respiration. We explain why phloem cells must be considered as key contributors of leaf respiration, particularly in illuminated leaves where mesophyll cell catabolism is downregulated.
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Moreno-Echeverry et al. (2026) studied this question.
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