Farmer seed exchange is essential for food security because seed exchange maintains crop biodiversity and, in turn, biodiverse crops survive better climate changes and pest infection. However, actually we do not understand exactly how seed exchange networks induce crop diversity. A study by Pautasso explains why individual farmers do not cultivate all varieties present in a region or a village.
Jerusalem artichoke is good for health because this plant contains inulin, a dietary fiber that enhances the immune system in humans. However cultivating Jerusalem artichoke is actually difficult because freshly harvested seeds are dormant, meaning that seeds are ‘sleeping’. Seeds indeed need lengthy storage and complicated treatments to ‘wake up’ and grow. Puttha et al. found that treating seeds under cold and wet conditions with gibberellic acid, a natural compound, waked up seeds rapidly.