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Article: Pollination ecology and breeding system of Xylopia championii (Annonaceae): curculionid beetle pollination, promoted by floral scents and elevated floral temperatures

TitlePollination ecology and breeding system of Xylopia championii (Annonaceae): curculionid beetle pollination, promoted by floral scents and elevated floral temperatures
Authors
KeywordsAnnonaceae
Breeding system
Coleoptera
Curculionidae
Endaeus
Floral scent
Floral temperature
Pollination
Sri lanka
Xylopia championii
Issue Date2007
PublisherUniversity of Chicago Press. The Journal's web site is located at http://www.journals.uchicago.edu/IJPS
Citation
International Journal Of Plant Sciences, 2007, v. 168 n. 9, p. 1255-1268 How to Cite?
AbstractData on the reproductive biology of the Annonaceae are rather fragmentary, particularly for paleotropical species. The pollination ecology and breeding system of the Sri Lankan endemic Xylopia championii (Annonaceae) are described in detail. The pollination ecology was investigated using a diverse range of approaches, including (1) observations of flower-level and population-level phenology, (2) assessments of floral visitors and effective pollinators, (3) monitoring of floral temperature in situ using a digital data logger, and (4) analysis of scent chemistry using solid-phase microextraction sampling and gas chromatography-mass spectrometry identification of volatiles. The breeding system was evaluated using pollen/ovule ratios and field-based controlled-pollination experiments. Intrafloral dichogamy (protogyny) occurs over a 2-d period, with a reproductively inactive phase between the pistillate and staminate phases, although there is no evidence of interfloral dichogamy. The inner petals close to form a pollination chamber during the reproductively active phases. The flowers are pollinated by a species of Endaeus weevil (Coleoptera: Curculionidae). Floral chamber temperatures are elevated to 8°C above ambient levels. The floral scent contains a combination of volatiles that have previously been observed in fruits and other flowers and that possibly mimic insect pheromones. Xylopia championii has an essentially xenogamous breeding system, promoted by protogyny. Although X. championii possesses numerous clear adaptations for cantharophily, there is no evidence for a species-specific interaction. The beetles are attracted to the flowers by strong scents; rewards offered to the beetles include heat energy and protection from predators. Low levels of fruit set in natural conditions suggest that pollinator availability may be a limiting factor. © 2007 by The University of Chicago. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/57160
ISSN
2015 Impact Factor: 1.536
2015 SCImago Journal Rankings: 0.823
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorRatnayake, RMCSen_HK
dc.contributor.authorGunatilleke, IAUNen_HK
dc.contributor.authorWijesundara, DSAen_HK
dc.contributor.authorSaunders, RMKen_HK
dc.date.accessioned2010-04-12T01:27:48Z-
dc.date.available2010-04-12T01:27:48Z-
dc.date.issued2007en_HK
dc.identifier.citationInternational Journal Of Plant Sciences, 2007, v. 168 n. 9, p. 1255-1268en_HK
dc.identifier.issn1058-5893en_HK
dc.identifier.urihttp://hdl.handle.net/10722/57160-
dc.description.abstractData on the reproductive biology of the Annonaceae are rather fragmentary, particularly for paleotropical species. The pollination ecology and breeding system of the Sri Lankan endemic Xylopia championii (Annonaceae) are described in detail. The pollination ecology was investigated using a diverse range of approaches, including (1) observations of flower-level and population-level phenology, (2) assessments of floral visitors and effective pollinators, (3) monitoring of floral temperature in situ using a digital data logger, and (4) analysis of scent chemistry using solid-phase microextraction sampling and gas chromatography-mass spectrometry identification of volatiles. The breeding system was evaluated using pollen/ovule ratios and field-based controlled-pollination experiments. Intrafloral dichogamy (protogyny) occurs over a 2-d period, with a reproductively inactive phase between the pistillate and staminate phases, although there is no evidence of interfloral dichogamy. The inner petals close to form a pollination chamber during the reproductively active phases. The flowers are pollinated by a species of Endaeus weevil (Coleoptera: Curculionidae). Floral chamber temperatures are elevated to 8°C above ambient levels. The floral scent contains a combination of volatiles that have previously been observed in fruits and other flowers and that possibly mimic insect pheromones. Xylopia championii has an essentially xenogamous breeding system, promoted by protogyny. Although X. championii possesses numerous clear adaptations for cantharophily, there is no evidence for a species-specific interaction. The beetles are attracted to the flowers by strong scents; rewards offered to the beetles include heat energy and protection from predators. Low levels of fruit set in natural conditions suggest that pollinator availability may be a limiting factor. © 2007 by The University of Chicago. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherUniversity of Chicago Press. The Journal's web site is located at http://www.journals.uchicago.edu/IJPSen_HK
dc.relation.ispartofInternational Journal of Plant Sciencesen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsInternational Journal of Plant Sciences. Copyright © University of Chicago Press.en_HK
dc.subjectAnnonaceaeen_HK
dc.subjectBreeding systemen_HK
dc.subjectColeopteraen_HK
dc.subjectCurculionidaeen_HK
dc.subjectEndaeusen_HK
dc.subjectFloral scenten_HK
dc.subjectFloral temperatureen_HK
dc.subjectPollinationen_HK
dc.subjectSri lankaen_HK
dc.subjectXylopia championiien_HK
dc.titlePollination ecology and breeding system of Xylopia championii (Annonaceae): curculionid beetle pollination, promoted by floral scents and elevated floral temperaturesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1058-5893&volume=168&issue=9&spage=1255&epage=1268&date=2007&atitle=Pollination+ecology+and+breeding+system+of+Xylopia+championii+(Annonaceae):+curculionid+beetle+pollination,+promoted+by+floral+scents+and+elevated+floral+temperaturesen_HK
dc.identifier.emailSaunders, RMK: saunders@hkucc.hku.hken_HK
dc.identifier.authoritySaunders, RMK=rp00774en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1086/521689en_HK
dc.identifier.scopuseid_2-s2.0-36849092758en_HK
dc.identifier.hkuros139195-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-36849092758&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume168en_HK
dc.identifier.issue9en_HK
dc.identifier.spage1255en_HK
dc.identifier.epage1268en_HK
dc.identifier.isiWOS:000250443700003-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridRatnayake, RMCS=55391274300en_HK
dc.identifier.scopusauthoridGunatilleke, IAUN=6602843852en_HK
dc.identifier.scopusauthoridWijesundara, DSA=7801390921en_HK
dc.identifier.scopusauthoridSaunders, RMK=35345489600en_HK

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