From orchids to monkeyflowers: How floral volatiles shape pollinator behavior

2016 ◽  
Author(s):  
Kelsey J. R. P. Byers
Keyword(s):  
Floral Volatiles ◽  
Pollinator Behavior

scholarly journals Generalized olfactory detection of floral volatiles in the highly specialized Greya-Lithophragma nursery pollination system

2021 ◽  
Author(s):  
Florian P. Schiestl ◽  
Erika A. Wallin ◽  
John J. Beck ◽  
Magne Friberg ◽  
John N. Thompson
Keyword(s):  
Selective Advantage ◽  
Floral Volatiles ◽  
Pollination System ◽  
Allopatric Populations ◽  
Evolutionary Scenario ◽  
Plant Recognition ◽  
Hexahydrofarnesyl Acetone ◽  
Electroantennographic Detection ◽  
Local Host ◽  
Olfactory Detection

AbstractVolatiles are of key importance for host-plant recognition in insects. In the pollination system of Lithophragma flowers and Greya moths, moths are highly specialized on Lithophragma, in which they oviposit and thereby pollinate the flowers. Floral volatiles in Lithophragma are highly variable between species and populations, and moths prefer to oviposit into Lithophragma flowers from populations of the local host species. Here we used gas chromatography coupled with electroantennographic detection (GC-EAD) to test whether Greya moths detect specific key volatiles or respond broadly to many volatiles of Lithophragma flowers. We also addressed whether olfactory detection in Greya moths varies across populations, consistent with a co-evolutionary scenario. We analyzed flower volatile samples from three different species and five populations of Lithophragma occurring across a 1400 km range in the Western USA, and their sympatric female Greya politella moths. We showed that Greya politella detect a broad range of Lithophragma volatiles, with a total of 23 compounds being EAD active. We chemically identified 15 of these, including the chiral 6, 10, 14-trimethylpentadecan-2-one (hexahydrofarnesyl acetone), which was not previously detected in Lithophragma. All investigated Lithophragma species produced the (6R, 10R)-enantiomer of this compound. We showed that Greya moths detected not only volatiles of their local Lithophragma plants, but also those from allopatric populations/species that they not encounter in local populations. In conclusion, the generalized detection of volatiles and a lack of co-divergence between volatiles and olfactory detection may be of selective advantage for moths in tracking hosts with rapidly evolving, chemically diverse floral volatiles.

scholarly journals Hawkmoths evaluate scenting flowers with the tip of their proboscis

eLife ◽  
2016 ◽  
Vol 5 ◽  
Author(s):  
Alexander Haverkamp ◽  
Felipe Yon ◽  
Ian W Keesey ◽  
Christine Mißbach ◽  
Christopher Koenig ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Manduca Sexta ◽  
Ecosystem Service ◽  
Floral Scent ◽  
Nicotiana Attenuata ◽  
Floral Volatiles ◽  
Pollen Transfer ◽  
Olfactory Neurons ◽  
Molecular Analyses ◽  
Choice Tests

Pollination by insects is essential to many ecosystems. Previously, we have shown that floral scent is important to mediate pollen transfer between plants (<xref ref-type="bibr" rid="bib16">Kessler et al., 2015</xref>). Yet, the mechanisms by which pollinators evaluate volatiles of single flowers remained unclear. Here, Nicotiana attenuata plants, in which floral volatiles have been genetically silenced and its hawkmoth pollinator, Manduca sexta, were used in semi-natural tent and wind-tunnel assays to explore the function of floral scent. We found that floral scent functions to increase the fitness of individual flowers not only by increasing detectability but also by enhancing the pollinator's foraging efforts. Combining proboscis choice tests with neurophysiological, anatomical and molecular analyses we show that this effect is governed by newly discovered olfactory neurons on the tip of the moth's proboscis. With the tip of their tongue, pollinators assess the advertisement of individual flowers, an ability essential for maintaining this important ecosystem service.

THE SCENT OF A MALE: THE ROLE OF FLORAL VOLATILES IN POLLINATION OF A GENDER DIMORPHIC PLANT

Ecology ◽  
2005 ◽  
Vol 86 (8) ◽  
pp. 2099-2105 ◽  
Author(s):  
Tia-Lynn Ashman ◽  
Megan Bradburn ◽  
Denise H. Cole ◽  
Bernard H. Blaney ◽  
Robert A. Raguso
Keyword(s):  
Floral Volatiles

Nectar robbing impacts pollinator behavior but not plant reproduction

Oikos ◽  
2016 ◽  
Vol 125 (11) ◽  
pp. 1668-1676 ◽  
Author(s):  
Jenny A. Hazlehurst ◽  
Jordan O. Karubian
Keyword(s):  
Plant Reproduction ◽  
Nectar Robbing ◽  
Pollinator Behavior

Chemical diversity of floral volatiles in Asclepiadoideae-Asclepiadeae (Apocynaceae)

2008 ◽  
Vol 36 (11) ◽  
pp. 842-852 ◽  
Author(s):  
Andreas Jürgens ◽  
Stefan Dötterl ◽  
Sigrid Liede-Schumann ◽  
Ulrich Meve
Keyword(s):  
Chemical Diversity ◽  
Floral Volatiles

scholarly journals Intraflower variation in nectar secretion: Secretion patterns and pollinator behavior in male- and female-phase flowers

2018 ◽  
Vol 105 (5) ◽  
pp. 842-850 ◽  
Author(s):  
Ando Misaki ◽  
Tomoyuki Itagaki ◽  
Yutaka Matsubara ◽  
Satoki Sakai
Keyword(s):  
Nectar Secretion ◽  
Male And Female ◽  
Pollinator Behavior ◽  
Female Phase

Floral volatiles: from biosynthesis to function

2014 ◽  
Vol 37 (8) ◽  
pp. 1936-1949 ◽  
Author(s):  
JOËLLE K. MUHLEMANN ◽  
ANTJE KLEMPIEN ◽  
NATALIA DUDAREVA
Keyword(s):  
Floral Volatiles
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