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Article: Floral evolution in the Annonaceae: Hypotheses of homeotic mutations and functional convergence

TitleFloral evolution in the Annonaceae: Hypotheses of homeotic mutations and functional convergence
Authors
Keywordsandrodioecy
Annonaceae
convergence
homeosis
phylogeny
pollination chamber
stamens
staminodes
sympetaly
syncarpy
unisexuality
Issue Date2010
PublisherWiley-Blackwell Publishing Ltd.. The Journal's web site is located at http://www.wiley.com/bw/journal.asp?ref=1464-7931
Citation
Biological Reviews, 2010, v. 85 n. 3, p. 571-591 How to Cite?
AbstractThe recent publication of hypotheses explaining the homeotic control of floral organ identity together with the availability of increasingly comprehensive and well-resolved molecular phylogenies presents an ideal opportunity for reassessing current knowledge of floral diversity and evolution in the Annonaceae. This review summarizes currently available information on selected aspects of floral structure and function, including: changes in the number of perianth whorls and the number of perianth parts per whorl; the evolution of sympetaly; the diversity and evolution of pollination chambers (with a novel classification of seven main structural forms of floral chamber based on the different arrangement, size and shape of petals); the evolution of perianth glands; floral unisexuality and hypotheses explaining the unexpectedly high frequency of occurrence of androdioecy; the origin and possible function of inner and outer staminodes; the evolution of stamen connective diversity and theca septation; and the origin of 'true' syncarpy and functionally equivalent extragynoecial compita. In each case, current ideas on the origin, evolution and function are discussed. The information presented in this review enables two main conclusions to be drawn. The first is that changes in the homeotic control of floral organ identity may have had a profound impact on floral structure in several disparate lineages in the family. This is most obvious in Fenerivia, in which a centrifugal shift of floral organ identity has occurred, and in Dasymaschalon, in which a reverse (centripetal) shift has occurred. Other genera that have gained or lost entire perianth whorls are likely to have undergone similar homeotic changes. Attention is also drawn to the extensive functional convergence in Annonaceae flowers, with widespread homoplasy in many characters that have previously been emphasized in higher-level classifications. © 2009 Cambridge Philosophical Society.
Persistent Identifierhttp://hdl.handle.net/10722/89341
ISSN
2015 Impact Factor: 10.725
2015 SCImago Journal Rankings: 6.469
ISI Accession Number ID
Funding AgencyGrant Number
University of Hong Kong Research Committee
Funding Information:

This research was funded by a grant from the University of Hong Kong Research Committee. I am grateful to Lars Chatrou and Heimo Rainer for allowing access to unpublished molecular phylogenies; Vatsala Mirnaalini for drawing Fig. 4; Achala Attanayake, Piya Chalermglin, Thomas Couvreur, Simon Gardner, Tim Paine, Pang Chun Chiu, Nicole Priller, Yvonne Su, Tim Utteridge, Wang Ruijiang and Zhou Linlin for permission to use their photographs; Laura Wong for technical assistance; and Jim Doyle and an anonymous reviewer for their invaluable comments.

References

 

DC FieldValueLanguage
dc.contributor.authorSaunders, RMKen_HK
dc.date.accessioned2010-09-06T09:55:37Z-
dc.date.available2010-09-06T09:55:37Z-
dc.date.issued2010en_HK
dc.identifier.citationBiological Reviews, 2010, v. 85 n. 3, p. 571-591en_HK
dc.identifier.issn1464-7931en_HK
dc.identifier.urihttp://hdl.handle.net/10722/89341-
dc.description.abstractThe recent publication of hypotheses explaining the homeotic control of floral organ identity together with the availability of increasingly comprehensive and well-resolved molecular phylogenies presents an ideal opportunity for reassessing current knowledge of floral diversity and evolution in the Annonaceae. This review summarizes currently available information on selected aspects of floral structure and function, including: changes in the number of perianth whorls and the number of perianth parts per whorl; the evolution of sympetaly; the diversity and evolution of pollination chambers (with a novel classification of seven main structural forms of floral chamber based on the different arrangement, size and shape of petals); the evolution of perianth glands; floral unisexuality and hypotheses explaining the unexpectedly high frequency of occurrence of androdioecy; the origin and possible function of inner and outer staminodes; the evolution of stamen connective diversity and theca septation; and the origin of 'true' syncarpy and functionally equivalent extragynoecial compita. In each case, current ideas on the origin, evolution and function are discussed. The information presented in this review enables two main conclusions to be drawn. The first is that changes in the homeotic control of floral organ identity may have had a profound impact on floral structure in several disparate lineages in the family. This is most obvious in Fenerivia, in which a centrifugal shift of floral organ identity has occurred, and in Dasymaschalon, in which a reverse (centripetal) shift has occurred. Other genera that have gained or lost entire perianth whorls are likely to have undergone similar homeotic changes. Attention is also drawn to the extensive functional convergence in Annonaceae flowers, with widespread homoplasy in many characters that have previously been emphasized in higher-level classifications. © 2009 Cambridge Philosophical Society.en_HK
dc.languageengen_HK
dc.publisherWiley-Blackwell Publishing Ltd.. The Journal's web site is located at http://www.wiley.com/bw/journal.asp?ref=1464-7931en_HK
dc.relation.ispartofBiological Reviewsen_HK
dc.rightsThe definitive version is available at www3.interscience.wiley.comen_HK
dc.subjectandrodioecyen_HK
dc.subjectAnnonaceaeen_HK
dc.subjectconvergenceen_HK
dc.subjecthomeosisen_HK
dc.subjectphylogenyen_HK
dc.subjectpollination chamberen_HK
dc.subjectstamensen_HK
dc.subjectstaminodesen_HK
dc.subjectsympetalyen_HK
dc.subjectsyncarpyen_HK
dc.subjectunisexualityen_HK
dc.subject.meshAdaptation, Physiological - genetics-
dc.subject.meshAnnonaceae - genetics - physiology-
dc.subject.meshBiological Evolution-
dc.subject.meshFlowers - genetics-
dc.subject.meshGenes, Homeobox-
dc.titleFloral evolution in the Annonaceae: Hypotheses of homeotic mutations and functional convergenceen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1464-7931&volume=85&issue=3&spage=579&epage=591&date=2010&atitle=Floral+evolution+in+the+Annonaceae:+hypotheses+of+homeotic+mutations+and+functional+convergenceen_HK
dc.identifier.emailSaunders, RMK: saunders@hkucc.hku.hken_HK
dc.identifier.authoritySaunders, RMK=rp00774en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1111/j.1469-185X.2009.00116.xen_HK
dc.identifier.pmid20015311-
dc.identifier.scopuseid_2-s2.0-77954584994en_HK
dc.identifier.hkuros169273en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-77954584994&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume85en_HK
dc.identifier.issue3en_HK
dc.identifier.spage571en_HK
dc.identifier.epage591en_HK
dc.identifier.eissn1469-185X-
dc.identifier.isiWOS:000279722700009-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridSaunders, RMK=35345489600en_HK

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