Inhaltszusammenfassung

In the chasmophytic species Cymbalaria muralis seeds are thought to be dispersed to suitable microsites mostly by recurving fruiting pedicels in a negative phototropic reaction. Depending on pedicel growth, competence between capsules and availability and number of safe sites seeds are dispersed within a short range of the parent plant. This enables the species to replace individuals in order to provide a limited population growth while it prevents the colonization of distant habitats at the ...In the chasmophytic species Cymbalaria muralis seeds are thought to be dispersed to suitable microsites mostly by recurving fruiting pedicels in a negative phototropic reaction. Depending on pedicel growth, competence between capsules and availability and number of safe sites seeds are dispersed within a short range of the parent plant. This enables the species to replace individuals in order to provide a limited population growth while it prevents the colonization of distant habitats at the same time. Surprisingly, only a small number of seeds are found to be safe-site dispersed when the number of capsules produced by single plants is compared to the number of safe-site deposited capsules. Furthermore, investigations of capsule and seed micromorphology, the mechanism of dehiscence as well as germination experiments suggest that the species is taking advantage of a variety of factors that can enhance secondary dispersal leading to a potential long-range dispersal. » weiterlesen» einklappen

Autoren

Klassifikation

DDC Sachgruppe:
Pflanzen (Botanik)