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Title: Active pollination favours sexual dimorphism in floral scent.
Authors: Okamoto, Tomoko
Kawakita, Atsushi  kyouindb  KAKEN_id
Goto, Ryutaro  kyouindb  KAKEN_id  orcid (unconfirmed)
Svensson, Glenn P
Kato, Makoto
Author's alias: 岡本, 朋子
加藤, 真
Keywords: Epicephala
floral scent
obligate pollination mutualism
sexual dimorphism
Issue Date: 23-Oct-2013
Publisher: The Royal Society
Journal title: Proceedings of the Royal Society B: Biological Sciences
Volume: 280
Issue: 1772
Thesis number: 20132280
Abstract: Zoophilous flowers often transmit olfactory signals to attract pollinators. In plants with unisexual flowers, such signals are usually similar between the sexes because attraction of the same animal to both male and female flowers is essential for conspecific pollen transfer. Here, we present a remarkable example of sexual dimorphism in floral signal observed in reproductively highly specialized clades of the tribe Phyllantheae (Phyllanthaceae). These plants are pollinated by species-specific, seed-parasitic Epicephala moths (Gracillariidae) that actively collect pollen from male flowers and pollinate the female flowers in which they oviposit; by doing so, they ensure seeds for their offspring. We found that Epicephala-pollinated Phyllanthaceae plants consistently exhibit major qualitative differences in scent between male and female flowers, often involving compounds derived from different biosynthetic pathways. In a choice test, mated female Epicephala moths preferred the scent of male flowers over that of female flowers, suggesting that male floral scent elicits pollen-collecting behaviour. Epicephala pollination evolved multiple times in Phyllantheae, at least thrice accompanied by transition from sexual monomorphism to dimorphism in floral scent. This is the first example in which sexually dimorphic floral scent has evolved to signal an alternative reward provided by each sex, provoking the pollinator's legitimate altruistic behaviour.
Description: 花粉を運ぶ昆虫が花の匂いの性的二型を引き起こした. 京都大学プレスリリース. 2013-10-23.
Rights: © 2013 The Author(s) Published by the Royal Society.
This is not the published version. Please cite only the published version.
DOI(Published Version): 10.1098/rspb.2013.2280
PubMed ID: 24153388
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