Fig. 4

Effect of cold and sucrose treatment on ABA (a-c), SA (d-f), IAA (g-i) and GA₃(j-l)内容jar1–1andcoi1–16mutants and their respective wild types, Col-0 and Col-gl. The plants were grown at 20 °C (red bars) or 4 °C (blue bars) in compost (a,d,gandj), or on agar without (b,e,handk) or with (c,f,iandl) addition of 55.5 mM sucrose. Individual leaves were analysed for compost-grown plants and whole shoots for agar plates. Compost-grown plants were harvested after 15 days of temperature treatment (age of plants 54 days); agar-grown plants were harvested after 25 days of treatment (age of plants 38 days). Data are means of 5 plants (compost) or plants from 5 plates +SE. Temperature effects, genotype effects and interactions were analysed by two-way ANOVA. The asterisks indicate statistically significant differences between the 20 °C and 4 °C treatments for each genotype (Tukey’s HSD post-hoc test; *P < 0.05; **P < 0.01). To allow comparison of the hormone contents on different growth media, the y-axis scaling is the same for all media