Fig. 2

Effects of exogenous melatonin and 24-epibrassinolide on EL, chlorophyll and total protein contents of tall fescue seedlings under heat stress condition. a: electrolyte leakage; b: chlorophyll content; c: total protein content. Eight days old seedlings on control MS plates were transplanted into MS medium containing 20 μM melatonin (MT) or 0. 1 μM 24-epibrassinolide (EBL) for 2 d, and then heat stress was applied for indicated time. For EL and chlorophyll determination the seedlings were moved to room temperature for 2 d recovery, but plant materials was collected immediately after heat stress for protein analysis. Data were means ±SE of three biological replications. Bars with different letters indicate significant difference at P≤0.05 (Duncan test)