scholarly journals FLORAL ISOLATION IS THE MAIN REPRODUCTIVE BARRIER AMONG CLOSELY RELATED SEXUALLY DECEPTIVE ORCHIDS

Evolution ◽  
2011 ◽  
Vol 65 (9) ◽  
pp. 2606-2620 ◽  
Author(s):  
Shuqing Xu ◽  
Philipp M. Schlüter ◽  
Giovanni Scopece ◽  
Hendrik Breitkopf ◽  
Karin Gross ◽  
...  
Keyword(s):  
Reproductive Barrier ◽  
Floral Isolation ◽  
Sexually Deceptive Orchids

scholarly journals Stearoyl-acyl carrier protein desaturases are associated with floral isolation in sexually deceptive orchids

2011 ◽  
Vol 108 (14) ◽  
pp. 5696-5701 ◽  
Author(s):  
P. M. Schluter ◽  
S. Xu ◽  
V. Gagliardini ◽  
E. Whittle ◽  
J. Shanklin ◽  
...  
Keyword(s):  
Acyl Carrier Protein ◽  
Carrier Protein ◽  
Floral Isolation ◽  
Sexually Deceptive Orchids

scholarly journals Pollinator-Driven Speciation in Sexually Deceptive Orchids

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Shuqing Xu ◽  
Philipp M. Schlüter ◽  
Florian P. Schiestl
Keyword(s):  
Species Diversity ◽  
Floral Scent ◽  
Meta Analysis ◽  
Species Differentiation ◽  
Closely Related Species ◽  
Plant Group ◽  
Floral Isolation ◽  
Sexual Mimicry ◽  
Sexually Deceptive Orchids ◽  
Pollinator Shift

Pollinator-mediated selection has been suggested to play a major role for the origin and maintenance of the species diversity in orchids. Sexually deceptive orchids are one of the prime examples for rapid, pollinator-mediated plant radiations, with many species showing little genetic differentiation, lack of postzygotic barriers, but strong prezygotic reproductive isolation. These orchids mimic mating signals of female insects and employ male insects as pollinators. This kind of sexual mimicry leads to highly specialised pollination and provides a good system for investigating the process of pollinator-driven speciation. Here, we summarise the knowledge of key processes of speciation in this group of orchids and conduct a meta-analysis on traits that contribute to species differentiation, and thus potentially to speciation. Our study suggests that pollinator shift through changes in floral scent is predominant among closely related species in sexually deceptive orchids. Such shifts can provide a mechanism for pollinator-driven speciation in plants, if the resulting floral isolation is strong. Furthermore, changes in floral scent in these orchids are likely controlled by few genes. Together these factors suggest speciation in sexually deceptive orchids may happen rapidly and even in sympatry, which may explain the remarkable species diversity observed in this plant group.

Floral isolation is the major reproductive barrier between a pair of rewarding orchid sister species

2015 ◽  
Vol 28 (1) ◽  
pp. 117-129 ◽  
Author(s):  
M. Sun ◽  
P. M. Schlüter ◽  
K. Gross ◽  
F. P. Schiestl
Keyword(s):  
Reproductive Barrier ◽  
Sister Species ◽  
Floral Isolation

Reply to Johannesson & Johannesson

1993 ◽  
Vol 73 (1) ◽  
pp. 250-250
Author(s):  
J. Grahame ◽  
P. J. Mill ◽  
M. Double ◽  
S. L. Hull
Keyword(s):  
Genetic Relationships ◽  
Taxonomic Status ◽  
Reproductive Barrier ◽  
Diversifying Selection ◽  
Pattern Of Variation

Johannesson & Johannesson (1993) contend that we have misread their earlier paper (Johannesson & Johannesson, 1990). They write that it is only possible to use neutral loci to study genetic relationships in closely related taxa (Johannesson & Johannesson, 1993) and that, there-fore, they had dismissed the variation in Aat-1 when considering the taxonomic status of Littorina neglecta (Johannesson & Johannesson, 1993). However, in their earlier paper they write: & ldquo;This [the pattern of variation in Aat-1] indicates that the within-site differentiation at Aat-1 is caused by diversifying selection in the two different micro-habitats rather than to a reproductive barrier between neglecta and saxatilis type snails” (Johannesson & Johannesson, 1990, p. 94). Therefore, after dealing separately with the pattern of variation at four loci which are ‘presumably neutral’ (Johannesson & Johannesson, 1990, p. 96), the Aat-1 variation is considered by these authors in the context of a putative reproductive barrier. The argument is repeated at the beginning of the discussion in Johannesson & Johannesson (1990, p. 95).

scholarly journals Identification of (Z)-8-Heptadecene and n-Pentadecane as Electrophysiologically Active Compounds in Ophrys insectifera and Its Argogorytes Pollinator

2020 ◽  
Vol 21 (2) ◽  
pp. 620 ◽  
Author(s):  
Björn Bohman ◽  
Alyssa M. Weinstein ◽  
Raimondas Mozuraitis ◽  
Gavin R. Flematti ◽  
Anna-Karin Borg-Karlson
Keyword(s):  
Carboxylic Acid ◽  
Sex Pheromone ◽  
Ethyl Oleate ◽  
Ethyl Linoleate ◽  
Insect Species ◽  
Active Compounds ◽  
Headspace Volatile ◽  
Pollinator Species ◽  
Sexually Deceptive Orchids ◽  
Specific Species

Sexually deceptive orchids typically depend on specific insect species for pollination, which are lured by sex pheromone mimicry. European Ophrys orchids often exploit specific species of wasps or bees with carboxylic acid derivatives. Here, we identify the specific semiochemicals present in O. insectifera, and in females of one of its pollinator species, Argogorytes fargeii. Headspace volatile samples and solvent extracts were analysed by GC-MS and semiochemicals were structurally elucidated by microderivatisation experiments and synthesis. (Z)-8-Heptadecene and n-pentadecane were confirmed as present in both O. insectifera and A. fargeii female extracts, with both compounds being found to be electrophysiologically active to pollinators. The identified semiochemicals were compared with previously identified Ophrys pollinator attractants, such as (Z)-9 and (Z)-12-C27-C29 alkenes in O. sphegodes and (Z)-9-octadecenal, octadecanal, ethyl linoleate and ethyl oleate in O. speculum, to provide further insights into the biosynthesis of semiochemicals in this genus. We propose that all these currently identified Ophrys semiochemicals can be formed biosynthetically from the same activated carboxylic acid precursors, after a sequence of elongation and decarbonylation reactions in O. sphegodes and O. speculum, while in O. insectifera, possibly by decarbonylation without preceding elongation.

scholarly journals Convergent specialization – the sharing of pollinators by sympatric genera of sexually deceptive orchids

2013 ◽  
Vol 101 (3) ◽  
pp. 826-835 ◽  
Author(s):  
Ryan D. Phillips ◽  
Tingbao Xu ◽  
Michael F. Hutchinson ◽  
Kingsley W. Dixon ◽  
Rod Peakall
Keyword(s):  
Sexually Deceptive Orchids
Sign in / Sign up

Export Citation Format

Share Document