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Changes in (A) phenotype, (B) endogenous spermidine (Spd) content, (C) shoot length, (D) root length, (E) photochemical efficiency, (F) performance index on absorption basis, (G) malondialdehyde content, and (H) electrolyte leakage in leaf of white clover in response to exogenous Spd and heat stress. Vertical bars indicate ±SE of mean (n = 4) and different letters above column indicate significant differences (p ≤ 0.05) among treatments.
