Fig. 1.

Identification of blast-resistant rice varieties in a light-dependent manner. (A) The wild-type TP309 and 25 rice varieties collected worldwide were used for blast resistance screen. The rice varieties inoculated with Guy11 were cultivated in a light incubator with different light intensity (50 and 200 μmol photons m⁻²s⁻¹). Red boxes indicate rice varieties with resistant variations under different light intensity. (B) Disease lesion area (DLA) was assessed by Image J. Lesions were photographed and measured or scored at 7 d postinoculation (dpi). The experiments were repeated twice with similar results. (C) Fungal growth and severity of blast were evaluated by quantifying M. oryzae genomic 28S rDNA relative to rice genomic Rubq1 DNA. The mean values of 3 determinations with SDs are shown. The asterisks indicate a significant difference according to Student’s t test (P < 0.01).