A new pollinating seed-consuming mutualism between Rheum nobile and a fly fungus gnat, Bradysia sp., involving pollinator attraction by a specific floral compound
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 2690876
Author(s) Song, B.; Chen, G.; Stöcklin, Jürg; Peng, D.; Niu, Y.; Sun, H.
Author(s) at UniBasel Stöcklin, Jürg
Year 2014
Title A new pollinating seed-consuming mutualism between Rheum nobile and a fly fungus gnat, Bradysia sp., involving pollinator attraction by a specific floral compound
Journal New Phytologist
Volume 203
Number 4
Pages / Article-Number 1109-1118
Keywords Bradysia, floral scent, Himalayas, mutualism, pollination, Rheum nobile, seed consumption
Abstract Pollinating seed-consuming mutualisms are regarded as exemplary models for studying coevolution, but they are extremely rare. In these systems, olfactory cues have been thought to play an important role in facilitating encounters between partners. We present a new pollinating seed-consuming mutualism from the high Himalayas between the endemic herb, Rheum nobile, and a fly fungus gnat, Bradysia sp.Seed production resulting from pollination by Bradysia flies and seed consumption by their larvae were measured to determine the outcome of this interaction. Floral scent analyses and behavioural tests were conducted to investigate the role of olfactory cues in pollinator attraction.Rheum nobile is self-compatible, but it depends mainly on Bradysia sp. females for pollination. Seed production resulting from pollination by adult flies is substantially higher than subsequent seed consumption by their larvae. Behavioural tests showed that an unusual floral compound, 2-methyl butyric acid methyl ester, emitted by plants only during anthesis, was attractive to female flies.Our results indicate that the R. nobile-Bradysia sp. interaction represents a new pollinating seed-consuming mutualism, and that a single unusual compound is the specific signal in the floral scent of R. nobile that plays a key role in attracting its pollinator.
Publisher Blackwell
ISSN/ISBN 0028-646X ; 1469-8137
edoc-URL http://edoc.unibas.ch/dok/A6289242
Full Text on edoc No
Digital Object Identifier DOI 10.1111/nph.12856
ISI-Number WOS:000340286000011
Document type (ISI) Article
 
   

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