2.2.2. Leaf Morphology and Physiology

At the third phytomer, the SLA significantly increased from 303 under B110 to 346 cm<sup>2</sup> g −1 under B310. No significant differences were observed for carbon assimilation, but there was a slight reduction with increased BPFD from 28.81 µmol CO<sup>2</sup> m−<sup>2</sup> s <sup>−</sup><sup>1</sup> under B110 to the minimum assimilation of 26.53 µmol CO<sup>2</sup> m−<sup>2</sup> s <sup>−</sup><sup>1</sup> under B310. SPAD values did not differ significantly between treatments and showed no tendency (Table 2).

**Table 2.** Least square means of the final measurement of specific leaf area (SLA), carbon assimilation (*A*) and SPAD at phytomer scale under different blue photosynthetic flux densities (BPFD). Letters indicate significant differences between treatments (*p* < 0.05).

