The transcriptome analysis reported here reveals the increased expression of several MYB TFs involved in iron uptake and homeostasis in eCO2 acorns, including MYB308 that regulates the expression of genes involved in iron uptake (Fan et al. 2022) and MYB8, which regulates iron uptake and translocation in response to iron deficiency (Gong et al. 2024). This evidence concerns the gene MYB and Iron deficiency anemia.