Statistical analysis
Physiological, biochemical traits and yield components were analyzed as a completely randomized design using a two-way analysis of variance of CO2 treatment, genotype and interaction using XLSTAT after testing for normal distribution. Wherever appropriate, comparison between means was performed using Tukey’s post hoc test (α = 0.05). Principal component analysis (PCA) was performed using the FactoMineR package using R (version 4.2.2, R Foundation for Statistical Computing) to analyze covariation.