3.3. Stomatal traits
The different light intensity resulted in different distributions of
the stomata traits (Table 4, Fig. 2). The highest stomatal frequency
and stomatal area per unit leaf area were observed on the abaxial
face under the 300 mol m−2 s−1 (Table 4, Fig. 2D), whereas the
lowest stomatal frequency and stomatal area per unit leaf area were
observed under 50 mol m−2 s−1 (Table 4, Fig. 2A). When PPFD
decreased from 300 to 50 mol m−2 s−1 or increased from 300 to
550 mol m−2 s−1, a gradual decrease in the stomatal frequency
and stomatal area per unit leaf area was observed. There was no significant
different in stomatal area per unit leaf area among 300, 450
and 550 mol m−2 s−1. Light intensity did not cause any significant
effect on single stomatal pore area.