Figure 6.

Relative gene expression of freshly harvested Nicotiana tabacum seeds displaying photo-dependent dormancy and germination responses in three different continuous light conditions (darkness (0 µmol m⁻² s⁻¹), VLFR-intensity white light (0.05 µmol m⁻² s⁻¹) and LFR-intensity white light (111 µmol m⁻² s⁻¹)) at 2 time points (24 and 48 h). Seeds were incubated at 20 °C with 5 treatments: Air GPAW, He/O₂ GPAW, Nitrate (5 mM KNO₃⁻), H₂O₂ (300 µM), and water. (a,b) Gene expression of EXPA4 at 24 and 48 h, respectively. (c,d) Gene expression of PIF4 at 24 and 48 h, respectively.