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Abstract Detail


Pollination Biology

Barrios Roque , Beyte  [1], Koptur, Suzanne [1].

Floral Biology and Breeding System of Angadenia berteroi (Apocynaceae): Why do flowers of the pineland golden trumpet produce few fruits?

Angadenia berteroi is a tropical perennial subshrub with large yellow flowers that set very few fruits in its native pine rockland habitat. To learn more about the breeding system of this rare species, we collected seeds from two populations and grew plants for greenhouse study. The flowers open early in the morning (prior to sunrise) and have a complex floral arrangement (the anthers form a conical structure surrounding the stigma, which has a secondary pollen presentation) that promotes outcrossing from visits by long-tongued pollinators. Hand-pollinations show that A. berteroi is mostly self-incompatible, with greatest fruit-set, fruit length, and seedling emergence resulting from crosses between unrelated individuals. The low fruit-set observed in natural populations may be due to low visitation by pollinators, matings between closely related individuals, or both.

Broader Impacts:


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1 - Florida International University, Department Of Biological Sciences, 11200 SW 8th St, Miami, FL, 33199, USA

Keywords:
breeding system
Apocynaceae
pollination
self-incompatibility.

Presentation Type: Oral Paper:Papers for Topics
Session: 52
Location: Delaware D/Hyatt
Date: Wednesday, July 11th, 2012
Time: 3:45 PM
Number: 52009
Abstract ID:437


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