
Keywords: Abscisic acid; Drought stress; Perennial ryegrass; Paclobutrazol; Trinexapac-ethyl; (TE); Trinexapac ethyl; (PAC); Paclobutrazol; (ABA); Abscisic acid; (PGRs); plant growth regulators; (RWC); relative water content; (EL); electrolyte leakage; (H2O2 conten