Fig. 4 Relative oxygen consumption as the percentage contribution of cytochrome c oxidase (Cyt c) (15 mM SHAM resistant) and the alternative oxidase (AO) (0.5 mM KCN resistant) pathways of two oat cultivars grown at 3°C at three developmental stages. Error bars are standard deviation of 10 to 15 embryos. Asterisks indicate significant differences between Ot220 and America cultivars at P 0.05