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Cross-section of a minor loading vein from the Swedish ecotype of A. thaliana grown under cool (14°C leaf temperature) and high light (1000 μmol photons m−2 s−1) conditions, illustrating the presence of phloem tissue beside and above the tracheids. This vein possesses 13 sieve elements and 6 tracheids, with SE and T indicating the uppermost sieve element and tracheid, respectively.
