Buds of chestnut (Castanea sativa Mill) were
grown on modified Heller's solid material medium with the addition of 0.1
mg/mL 6-benzyl aminopurine (BAP). They were divided monthly and used for
experiments with homogenous sinusoidal magnetic fields of 5.9, 3.2 and
1.2 mT for 1h/day, 6 days a week, for 28 days.
The results are season-dependent; bud growth was significantly enhanced over controls in early summer (50% at 5.9 mT, 64% at 3.2 mT and 62% at 1.2 mT). In late summer and fall, growth was inhibited slightly. In early winter, it was stimulated again. We also measured significant effects 1 month after cessation of stimulation.