FIGURE 4.

Phosphorylation of photosystem II (PSII) and Light Harvesting Complex II (LHCII), detected by anti‐phospho‐threonine immunoblotting, in the UK and IR wheat cultivars in well‐watered condition (WW) and in drought stress (DS) in the growth chamber at Drought Phase III. (a) Phosphorylation of PSII (CP43, D2, and D1 subunits) and LHCII (Lhcb1 and Lhcb2 subunits) proteins under steady‐state illumination in Drought Phase III. (b) PSII‐LHCII phosphorylation after shifting from growth light (450 μmol photons m⁻² s⁻¹) to 30 μmol photons m⁻² s⁻¹ (μE), or to 1,466 μmol photons m⁻² s⁻¹ for 10 min. P‐, phosphorylated