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Mark  [SIZE=4]Evolution, Dec 2000 v54 i6 p1995(12)  
Evolution of reproductive strategies in the sexually deceptive orchid Ophrys sphegodes: How does flower-specific variation of odor signals influence reproductive success? Manfred Ayasse; Florian Schiestl; Hannes F. Paulus; Christer Lofstedt; Bill Hansson; Fernando Ibarra; Wittko Francke.  
Abstract: Reproductive strategies and their evolution in the [U]sexually deceptive orchid Ophrys sphegodesMiller are discussed relative to flower-specific variation of odor signals and their influence on reproductive success. The orchid is pollinated by sexually excited males of the solitary bee Andrea nitroaenea, attracted to the flowers by visual cues and volatile semiochemicals. A higher selective pressure on the pollinator-attracting communication signal explains less intraspecific variation in odor of the biologically active compounds vs nonactive compounds. A characteristic variation in the bas chromatography with electroantennographic detection (GC-EAD) active esters and aldehydes among flowers of different stem positions within an inflorescence and in the n-alkanes and n-alkenes was seen among plants from different populations.  
 
 
   Article A74385812  
     
 

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Bees - Environmental Aspects
23 Periodical references  
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Evolution - Research
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Orchids - Flavor and Odor
4 Periodical references  
40 other subdivisions  
Pollination by Insects - Research
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Semiochemicals - Physiological Aspects
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Sex in Plants - Research
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Evolution, Dec 1, 2000
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