Document Detail

Effect of nectar secretion rate on pollination success of Passiflora coccinea (Passifloraceae) in the Central Amazon.
MedLine Citation:
PMID:  16906307     Owner:  NLM     Status:  MEDLINE    
The pollination of Passiflora coccinea by the hummingbird Phaethornis superciliosus was studied in Central Amazon, Brazil. We hypothesized that a greater nectar secretion rate (NSR) increases the pollination success of single flowers through Ph. superciliosus visiting behavior. For control flowers, NSR was an increasing function of flower base diameter (FBD). The total number of Ph. superciliosus probes per flower was an increasing function of FBD. Additionally, deposition of pollen on stigmas increased with the cumulative number of Ph. superciliosus probes. Our results show that larger P. coccinea flowers secrete nectar at higher rates, are probed more times during each hummingbird visit and are more successful at pollination. This seems to be the first non-manipulative study describing such an effect of NSR on the pollination of single flowers in nature.
E Fischer; I R Leal
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Brazilian journal of biology = Revista brasleira de biologia     Volume:  66     ISSN:  1519-6984     ISO Abbreviation:  Braz J Biol     Publication Date:  2006 May 
Date Detail:
Created Date:  2006-08-14     Completed Date:  2007-04-12     Revised Date:  2007-09-06    
Medline Journal Info:
Nlm Unique ID:  101129542     Medline TA:  Braz J Biol     Country:  Brazil    
Other Details:
Languages:  eng     Pagination:  747-54     Citation Subset:  IM    
Instituto de Biologia, Universidade Estadual de Campinas, CEP 13081-970, Campinas, São Paulo, Brazil.
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MeSH Terms
Behavior, Animal / physiology*
Birds / physiology*
Flowers / anatomy & histology,  physiology*
Passiflora / anatomy & histology,  physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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