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Seed production type

Formal name:  seed production type
Local identifier:  TOP115
Definition:  a feature of the whole plant (PO:whole plant) characterizing the seed (PO:seed) production with respect to amphimixis or apomixis (PO:somatic plant embryo). In amphimixis, one of the pollen sperm nuclei unites with the egg cell and form the zygote (PO:whole plant zygote). The other unites with the polar nuclei and forms the endosperm (PO:endosperm)
Formal Unit:  unitless (nominal)

Reference:  Klotz, S., Kühn, I. & Durka, W. (2002): BIOLFLOR - Eine Datenbank zu biologisch-oekologischen Merkmalen der Gefaesspflanzen in Deutschland. - Schriftenreihe fuer Vegetationskunde 38. Bonn: Bundesamt fuer Naturschutz.