The effect of changes in temperature on yellow rust resistance in wheat cultivars Shamrock and Solstice. Percentage (%) leaf area covered in uredia 18 dpi with Pst isolate 08/21 when kept at the same temperature regime of 12°C/18°C or 12°C/25°C pre and post inoculation (dark grey) or transferred to the other temperature regime post inoculation (light grey). Wheat cultivars A) Shamrock and B) Solstice. The Pst inoculated area is bounded by black, vertical lines. Mean values (± 1 standard error) were obtained from at least two independent experiments where cultivars Shamrock and Solstice were inoculated at the same time. Different letters indicate statistically significant differences (P <0.01).