Quantitative parameters (μm) measured in leaves of P. maximum grown under different levels of [CO2] and temperature at Trop-T-FACE facility.

CUAD = adaxial cuticle thickness. CUAB = abaxial cuticle thickness. EPAD = adaxial epidermis thickness. EPAB = abaxial epidermis thickness. SCL = sclerenchyma thickness. MES = mesophyll thickness. LT = leaf thickness. BUL = polar length of bulliform cells. VASBU = polar length of vascular bundles. BSC = polar length of bundle sheath cells. VASDIS = distance between vascular bundles. Param. = parameter. ANOVA = p-values for significant effects: [CO2] (isolated effect of elevated [CO2]), T. (isolated effect of air warming), and [CO2] × T. (interaction of elevated [CO2] × Temp). [CO2] levels: aC (ambient [CO2], ~400 μmol mol-1) and eC (elevated [CO2], ~600 μmol mol-1). Temperature levels: aT (ambient temperature) and eT (2°C more than the ambient temperature).