Fig. 1

Responses of okra genotypes to drought, heat or a combination of heat and drought at the seedling stage. (A) Fv/Fm ratio; (B) chlorophyll content; (C) shoot dry weight; (D) shoot fresh weight; (E) relative water content; (F) performance index; (G) electrolyte leakage; and (H) total leaf area. Error bars indicating the standard error of the mean (SEM) show differences between stress factors and the interaction between stress and day, which was established using ANOVA. These differences are represented by l.s.d. (P < 0.05) bars.