TITLE

Post-pollination emission of a repellent compound in a sexually deceptive orchid: a new mechanism for maximising reproductive success?

AUTHOR(S)
Schiestl, Florian P.; Ayasse, Manfred
PUB. DATE
February 2001
SOURCE
Oecologia;Feb2001, Vol. 126 Issue 4, p531
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The flowers of the sexually deceptive orchid Ophrys sphegodes are pollinated by pseudocopulating males of the solitary bee Andrena nigroaenea. We investigated the changes in odor emission and reduced attractiveness that occur after pollination in these plants. We analyzed floral odor of unpollinated and pollinated flowers by gas chromatography and compared relative and absolute amounts of electrophysiologically active compounds. Headspace odor samples of O. sphegodes flowers showed a significant increase in absolute and relative amounts of all-trans-farnesyl hexanoate after pollination. Flower extracts also indicated an increase of farnesyl hexanoate after pollination. The total amount of the other physiologically active odor compounds decreased slightly. Farnesyl hexanoate is a major constituent of the Dufour's gland secretion in females of the pollinator bees, A. nigroaenea, where it functions in the lining of the brood cells. Furthermore, this compound lowers the number of copulation attempts in males. In dual-choice tests, we showed that flowers artificially scented with an amount of farnesyl hexanoate equal to the increased amount after pollination were significantly less attractive than flowers treated with solvent only. We propose that the increased production of farnesyl hexanoate in pollinated flowers is a signal to guide pollinators to unpollinated flowers of the inflorescence, which represents a new mechanism in this pollination system.
ACCESSION #
15687106

 

Related Articles

  • Sex pheromone mimicry in the early spider orchid (Ophrys sphegodes): patterns of hydrocarbons as the key mechanism for pollination by sexual deception. Schiestl, F. P.; Ayasse, M.; Paulus, H. F.; Löfstedt, C.; Hansson, B. S.; Ibarra, F.; Francke, W. // Journal of Comparative Physiology A: Sensory, Neural & Behaviora;Jun2000, Vol. 186 Issue 6, p567 

    We investigated the female-produced sex pheromone of the solitary bee Andrena nigroaenea and compared it with floral scent of the sexually deceptive orchid Ophrys sphegodes which is pollinated by Andrena nigroaenea males. We identified physiologically and behaviorally active compounds by gas...

  • Pollinator attracting odour signals in sexually deceptive orchids of the Ophrys fusca group. Stökl, J.; Paulus, H.; Dafni, A.; Schulz, C.; Francke, W.; Ayasse, M. // Plant Systematics & Evolution;Jul2005, Vol. 254 Issue 1/2, p105 

    We investigated patterns of volatiles of several allopatric and sympatric species of the Ophrys fusca group and one species of the O. mammosa/sphegodes group pollinated by either Andrena nigroaenea or A. flavipes, using electrophysiology (gas chromatography coupled with electroantennography;...

  • Orchids trick bees with UV colour.  // Orchid Review;Dec2013, Vol. 121 Issue 1304, p198 

    The article discusses the findings of a study which showed the color-changing characteristic of non-rewarding Oncidiinae orchids. The research conducted by a team from the Imperial College of London confirmed that neotropical orchids like the Trichocentrum ascendens and Oncidium nebulosum can...

  • Isolation mechanisms between two sympatric Sophronitis (Orchidaceae) species endemic to Northeastern Brazil. Silva-Pereira, V.; Camargo Smidt, E.; Leite Borba, E. // Plant Systematics & Evolution;Dec2007, Vol. 269 Issue 3-4, p171 

    Sophronitis sincorana and S. pfisteri (Orchidaceae) are endemic to the campo rupestre vegetation, northeastern Brazil, occurring sympatrically and flowering synchronously. In this work we studied the reproductive biology of both species and investigated reproductive barriers between them. Both...

  • Molecular (RAPD) analysis of some taxa of the Ophrys bertolonii aggregate(Orchidaceae). Caporali, Elizabetta; Grünanger, Paolo; Marziani, Giovanna; Servettaz, Orietta; Spada, Alberto // Israel Journal of Plant Sciences;2001, Vol. 49 Issue 2, p85 

    The RAPD methodology was utilized for analyzing the genetic material of four all opatric populations of the Ophrys bertoloniiformis type, as well as of two populations of O. bertolonii s.str., together with O. fuciflora as out group. Significant gene diversity was observed for all six taxa under...

  • Self-Deception: A Teleofunctional Approach. Smith, David // Philosophia;Mar2014, Vol. 42 Issue 1, p181 

    This paper aims to offer an alternative to the existing philosophical theories of self-deception. It describes and motivates a teleofunctional theory that models self-deception on the subintentional deceptions perpetrated by non-human organisms. Existing theories of self-deception generate...

  • Pollinator convergence and the nature of species' boundaries in sympatric Sardinian Ophrys (Orchidaceae). Cortis, P.; Vereecken, N. J.; Schiestl, F. P.; Lumaga, M. R. Barone; Scrugli, A.; Cozzolino, S. // Annals of Botany;Aug2009, Vol. 104 Issue 3, p497 

    Background and Aims: In the sexually deceptive Ophrys genus, species isolation is generally considered ethological and occurs via different, specific pollinators, but there are cases in which Ophrys species can share a common pollinator and differ in pollen placement on the body of the insect....

  • Evidence for progenitor—derivative speciation in sexually deceptive orchids. Schlüter, Philipp M.; Ruas, Paulo M.; Kohl, Gudrun; Ruas, Claudete F.; Stuessy, Tod F.; Paulus, Hannes F. // Annals of Botany;Oct2011, Vol. 108 Issue 5, p895 

    Background and Aims Sexually deceptive orchids of the genus Ophrys use mimicry of pollinator females to attract specific pollinators. Pollinator shifts may drive speciation in Ophrys, since novel pollinators may in principle act as isolating factors immediately. It is thus possible that...

  • DESCRIPTION OF THREE NEW ANDRENA SPECIES (HYMENOPTERA: APOIDEA: ANDRENIDAE) FROM TURKEY. Scheuchl, Erwin; Hazir, Canan // Florida Entomologist;Dec2012, Vol. 95 Issue 4, p831 

    Three new bee species, Andrena (Melandrena) nitidemula sp. nov., Andrena (Truncandrena) urfanella sp. nov. and Andrena (Poecilandrena) efeana sp. nov. from Turkey are described. Important diagnostic characters are illustrated.

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics