<p><b>Effects of Lead Stress on the Initial fluorescence (F</b><sub><b>0</b></sub><b>; a), Maximum Photochemical Efficiency (F</b><sub><b>v</b></sub><b>/F</b><sub><b>m</b></sub><b>; b), Photochemical Quenching (qP; c), Nonphotochemical Quenching (qN; d), and Quantum Yield (ΦPSII; e) of <i>Ligustrum lucidum</i> Seedlings.</b> Vertical bars in the figure indicate means ± SD, n = 5. Different letters indicate significant differences at <i>P</i> < 0.05.</p
