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Plant Systematics and Evolution

, Volume 247, Issue 3–4, pp 241–254 | Cite as

Pollination biology and breeding system of Zeyheria montana (Bignoniaceae)

  • N. S. Bittencourt Jr.
  • J. Semir
Article

Abstract.

The reproductive biology of Zeyheria montana was studied through field observations of flower visitors and floral events, controlled manual pollinations, and observations of pollen tube growth and ovule penetration by fluorescence microscopy. Analysis of secretory areas of the nectar chamber was made by flower dissections and histology of serial sections. The flower lasted 6–8 days, but pollen exposure and stigma receptivity occurred only up to the end of the first and second days, respectively. Pollination was effected by several species of hummingbirds, especially Colibri serrirostris. The flowers present a rudimentary, non-functional disc, and secretion of nectar is performed by corolla-borne glandular trichomes. Only hand cross-pollinated and natural-pollinated flowers set fruits. Artificially self-pollinated and non-pollinated flowers dried off after anthesis without presenting any swelling of the ovary. Almost all the ovules in selfed and crossed pistils were penetrated 96 h after pollination. However, a delay in ovule penetration in self-pollinated pistils was verified, which indicates the occurrence of late-acting self-incompatibility.

Key words

Breeding system late-acting self-incompatibility hummingbird pollination nectar secretion Zeyheria Bignoniaceae 

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Copyright information

© Springer-Verlag Wien 2004

Authors and Affiliations

  1. 1.Departamento de Biologia VegetalUniversidade Federal de Viçosa (UFV)Minas GeraisBrazil
  2. 2.Departamento de BotânicaUniversidade Estadual de Campinas, (UNICAMP)São PauloBrazil

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