Fig. 1
Experimental design of drought and combination of drought and heat treatments in switchgrass. Control chamber: Regular watering (80% FC) and optimum temperature (30°/23 °C day/night temperature); Drought chamber: withhold watering at 45 days after transplanting the ramets and kept at optimum temperature (30°/23 °C day/night temperature); Drought + Heat chamber: imposed heat after 72 h of drought (35°/25 °C day/night temperature); Leaf tissue samples were collected at 0 h-drought (dt), 72 h-dt/0 h-heat (ht), 96 h-dt/24 h-ht, 120 h-dt, 48 h-ht, and 144 h-dt/72 h-ht impositions