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Medientyp:
E-Artikel
Titel:
The Breeding System and Aspects of Pollination Effectiveness in Oenothera speciosa (Onagraceae)
Beteiligte:
Wolin, Carole L.;
Galen, Candace;
Watkins, Lee
Erschienen:
Southwestern Association of Naturalists, 1984
Erschienen in:The Southwestern Naturalist
Sprache:
Englisch
ISSN:
0038-4909
Entstehung:
Anmerkungen:
Beschreibung:
<p>Oenothera speciosa is clonal and partially self-incompatible. Based on data from our studies seed-set is dependent on pollen transfer by floral visitors. Observations of foraging behavior and pollen transfer loads showed that honeybees were the most important pollinators. The pollen deposition function of honeybees on Oenothera speciosa declines exponentially with sequence of flower, so that only the first one or two flowers visited in a clone are expected to receive adequate pollen doses. Deficits in seed-set in field populations probably result from low frequency of effective pollinators and incompatible intraclonal pollinations.</p>