Alonso-Forn, D., Peguero-Pina, J.J., Ferrio, J.P., García-Plazaola, J.I., Martín-Sánchez, R., Niinemets, Ü., Sancho-Knapik, D., Gil-Pelegrín, E. 2022. Cell-level anatomy explains leaf age-dependent declines in mesophyll conductance and photosynthetic capacity in the evergreen Mediterranean oak Quercus ilex subsp. rotundifolia, Tree Physiology, tpac049, https://doi.org/10.1093/treephys/tpac049.