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Effect of drought, heat, and interaction between drought and heat stresses on (A) quantum yield efficiency (Fv/Fm), (B) photosynthetic rate (Pn), and (C) actual quantum yield efficiency (ΦPSII) of A. sieberi alba. Data expressed as mean of triplicates, error bars represent standard error for means. Means marked with different letters are significantly different according to ANOVA and DMRTs at p < 0.05.
