Figure 2. Germination of 0- and 6-month-old silicles and seeds from autumn- and spring-germinating plants (mean + 1 s.e.) of Isatis violascens incubated at 5/2 °C in darkness.

AP, autumn-germinating plants; SP, spring-germinating plants. Different lowercase letters indicate significant differences (P < 0.05) among the different storage times (0 and 6 mo) and different pericarp treatments (intact fruit vs. isolated seed) for autumn- and spring-germinating plants and different uppercase letters significant differences between autumn- and spring-germinating plants at the same storage time and the same pericarp treatment.