Document Detail


The evolution of floral biology in basal angiosperms.
MedLine Citation:
PMID:  20047868     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In basal angiosperms (including ANITA grade, magnoliids, Choranthaceae, Ceratophyllaceae) almost all bisexual flowers are dichogamous (with male and female functions more or less separated in time), and nearly 100 per cent of those are protogynous (with female function before male function). Movements of floral parts and differential early abscission of stamens in the male phase are variously associated with protogyny. Evolution of synchronous dichogamy based on the day/night rhythm and anthesis lasting 2 days is common. In a few clades in Magnoliales and Laurales heterodichogamy has also evolved. Beetles, flies and thrips are the major pollinators, with various degrees of specialization up to large beetles and special flies in some large-flowered Nymphaeaceae, Magnoliaceae, Annonaceae and Aristolochiaceae. Unusual structural specializations are involved in floral biological adaptations (calyptras, inner staminodes, synandria and food bodies, and secretory structures on tepals, stamens and staminodes). Numerous specializations that are common in monocots and eudicots are absent in basal angiosperms. Several families are poorly known in their floral biology.
Authors:
Peter K Endress
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Philosophical transactions of the Royal Society of London. Series B, Biological sciences     Volume:  365     ISSN:  1471-2970     ISO Abbreviation:  Philos. Trans. R. Soc. Lond., B, Biol. Sci.     Publication Date:  2010 Feb 
Date Detail:
Created Date:  2010-01-05     Completed Date:  2010-04-02     Revised Date:  2013-05-31    
Medline Journal Info:
Nlm Unique ID:  7503623     Medline TA:  Philos Trans R Soc Lond B Biol Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  411-21     Citation Subset:  IM    
Affiliation:
Institute of Systematic Botany, University of Zurich, Zollikerstrasse 107, 8008 Zurich, Switzerland. pendress@systbot.uzh.ch
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MeSH Terms
Descriptor/Qualifier:
Angiosperms / anatomy & histology,  genetics*,  physiology
Biological Evolution*
Flowers / anatomy & histology,  genetics*,  physiology
Pollination
Comments/Corrections

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