Fig. 1

Physiological variations induced by heat stress and senescence in tall fescue.a,bElectrolyte leakage (EL) (a) and PSII max-photo efficiencies (Fv/Fm) (b) of Con, HT_1h, HT_72h and Sen. Asterisks indicated significant difference with wild type at high temperature as estimated using Student’s t-test (**P < 0.01, ***P < 0.001). Error bars indicate the SD of three biological repeats. Con, control; HT_1h, 1 h of 38 °C heat treatment; HT_72h, 72 h of 38 °C heat treatment; Sen, senescent leaves