Source–Sink Adjustment: A Mechanistic Understanding of the Timing and Severity of Drought Stress on Photosynthesis and Grain Yields of Two Contrasting Oat (Avena sativa L.) Genotypes

There is limited knowledge about the effects of the severity and timing of drought stress on oat (Avena sativa) yield and the critical stages at which water management could be effectively implemented. A controlled study was conducted to identify a variety-specific critical stage, and to examine the physiological mechanisms of drought stress on photosynthesis (Pn) and yield formation in two contrasting genotypes. We found that compared with...