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Effect of single and associated stresses on chlorophyll fluorescence parameters in four eggplant varieties. (A): PSII efficiency (Fv/Fm); (B): PSII quantum yield (ΦPSII); (C): photochemical efficiency (qp); (D): non-photochemical quenching (NPQ). Data represents means ± SE (n = 5). Significant dissimilarities are shown by different lower-case letters between treatments (p ≤ 0.05) based on Tukey’s test. (C, control; H, heat stress; D, drought stress; H + D, heat + drought stresses).
