Figure 6.

Malondialdehyde (MDA; A), electrolyte leakage (EL; B), hydrogen peroxide (H₂O₂; C), superoxide dismutase (SOD; D), peroxidase (POD; E), and catalase (CAT; F) content of perennial ryegrass roots under drought and heat stress. The differences between treatments in each parameter were detected by one-way ANOVA at p < 0.05 level. Bars represent mean ± SD (n = 3). Columns marked with same small letter (a, b, c) indicate insignificant differences between four treatment groups. CK represents control, F represents A. aculeatus, D represents drought, DF represents drought + A. aculeatus, HT represents heat, and HTF represents heat + A. aculeatus.