Estimation of Leaf Water Use Efficiency Threshold Values for Water Stress in Winter Wheat (Triticum aestivum L.)

Figure 2

Diagram of the nonstress (T1, CK), the three drought stress levels (light, moderate, and severe) separately imposed at seedling (T2, T3, and T4), jointing (T5, T6, and T7), heading (T8, T9, and T10), and filling (T11, T12, and T13) stages, and the moderate drought stress continuously imposed at seedling and jointing stages (T14), jointing and heading stages (T15), and heading and filling stages (T16), respectively. FC: field holding capacity (cm³ cm^–3). %FC in the table represents the lower limit for triggering irrigation.