Figure 2.

Sudden heat shock (SHS) induced decrease and recovery of photosynthetic variables in two maize genotypes grown under elevated CO₂ conditions. Shapes of Shapes of circle in solid line and triangle in dotted line represent SHS treated leaves and nonheated leaves, respectively, while black and white symbols mean ambient CO₂ and elevated CO₂, respectively. The grey area represents the period during 2 h SHS. Vertical bars represent at two sides of each panel represent significance scale regarding each combination of CO₂ and SHS treatments across during and after SHS from one-way ANOVA analysis, (P < 0.05). n = 5.