Morphometric parameters of seedlings. Diagram of seedling and root length in the two-day (A) and four-day long (B) experiments. Statistically significant differences in length (p < 0.05), compared to the control, are indicated with a ‘§’ symbol when compared with the 1 g external control, and with ‘#’ when compared with the 1 g* control. The most pronounced differences were found in the 0 g* sample, which shows significant differences with respect to both external and internal controls in the two experiments. Seedlings in the internal and external controls (1 g and 1 g*) show significant differences after 4 days’ growth, but not after 2 days. After 4 days, all samples grown within the magnet (0 g*, 1 g* and 2 g*) are significantly different from the external control (1 g).