Geographic structuring and transgenerational maternal effects shape germination in native, but not introduced, populations of a widespread plant invader

摘要

PREMISE OF THE STUDY: Germination is critical in determining species distributions and invasion dynamics. However, is it unclear how often invasive populations evolve germination characteristics different from native populations, because few studies have isolated genetic variation by using seed from garden-grown plants. Additionally, while herbivore-induced transgenerational effects are common, it is unknown whether maternal herbivory differentially shapes germination in native and introduced off spring.