The effect of polyploidy and hybridization on the evolution of floral colour in Nicotiana (Solanaceae)

Hdl Handle:
http://hdl.handle.net/10141/621995
Title:
The effect of polyploidy and hybridization on the evolution of floral colour in Nicotiana (Solanaceae)
Authors:
McCarthy, EW; Arnold, SEJ; Chittka, L; Le Comber, SC; Verity, R; Dodsworth, S; Knapp, S ( 0000-0001-7698-3945 ) ; Kelly, LJ; Chase, MW; Baldwin, IT; Kovarik, A; Mhiri, C; Taylor, L; Leitch, AR
Abstract:
Background and Aims - Speciation in angiosperms can be accompanied by changes in floral colour that may influence pollinator preference and reproductive isolation. This study investigates whether changes in floral colour can accompany polyploid and homoploid hybridization, important processes in angiosperm evolution. Methods - Spectral reflectance of corolla tissue was examined for 60 Nicotiana (Solanaceae) accessions (41 taxa) based on spectral shape (corresponding to pigmentation) as well as bee and hummingbird colour perception in order to assess patterns of floral colour evolution. Polyploid and homoploid hybrid spectra were compared with those of their progenitors to evaluate whether hybridization has resulted in floral colour shifts. Key Results- Floral colour categories in Nicotiana seem to have arisen multiple times independently during the evolution of the genus. Most younger polyploids displayed an unexpected floral colour, considering those of their progenitors, in the colour perception of at least one pollinator type, whereas older polyploids tended to resemble one or both of their progenitors. Conclusions - Floral colour evolution in Nicotiana is weakly constrained by phylogeny, and colour shifts do occur in association with both polyploid and homoploid hybrid divergence. Transgressive floral colour in N. tabacum has arisen by inheritance of anthocyanin pigmentation from its paternal progenitor while having a plastid phenotype like its maternal progenitor. Potentially, floral colour evolution has been driven by, or resulted in, pollinator shifts. However, those polyploids that are not sympatric (on a regional scale) with their progenitor lineages are typically not divergent in floral colour from them, perhaps because of a lack of competition for pollinators.
Citation:
McCarthy EW, Arnold SEJ, Chittka L, Le Comber SC, Verity R, Dodsworth S, Knapp S, Kelly LJ, Chase MW, Baldwin IT, et al. 2015. The effect of polyploidy and hybridization on the evolution of floral colour in Nicotiana (Solanaceae). Ann Bot. 115:1117–1131.
Publisher:
Oxford University Press (OUP)
Journal:
Annals of Botany
Issue date:
15-May-2015
URI:
http://hdl.handle.net/10141/621995
DOI:
10.1093/aob/mcv048
Submitted date:
2016-12-08
Type:
Journal Article
Item Description:
© The Author 2015. Published by Oxford University Press on behalf of the Annals of Botany Company. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. The attached file is the published version of the article.
Subject Terms:
Evolution; Floral colour; Hybridization; Nicotiana; Flower pigmentation; Pollinator shifts; Polyploidy; Solanaceae; Spectral reflectance; Transgressive traits
ISSN:
1095-8290
Appears in Collections:
Life sciences

Full metadata record

DC FieldValue Language
dc.contributor.authorMcCarthy, EWen
dc.contributor.authorArnold, SEJen
dc.contributor.authorChittka, Len
dc.contributor.authorLe Comber, SCen
dc.contributor.authorVerity, Ren
dc.contributor.authorDodsworth, Sen
dc.contributor.authorKnapp, Sen
dc.contributor.authorKelly, LJen
dc.contributor.authorChase, MWen
dc.contributor.authorBaldwin, ITen
dc.contributor.authorKovarik, Aen
dc.contributor.authorMhiri, Cen
dc.contributor.authorTaylor, Len
dc.contributor.authorLeitch, ARen
dc.date.accessioned2016-12-14T14:12:52Z-
dc.date.available2016-12-14T14:12:52Z-
dc.date.issued2015-05-15en_US
dc.date.submitted2016-12-08-
dc.identifier.citationMcCarthy EW, Arnold SEJ, Chittka L, Le Comber SC, Verity R, Dodsworth S, Knapp S, Kelly LJ, Chase MW, Baldwin IT, et al. 2015. The effect of polyploidy and hybridization on the evolution of floral colour in Nicotiana (Solanaceae). Ann Bot. 115:1117–1131.en
dc.identifier.issn1095-8290en_US
dc.identifier.doi10.1093/aob/mcv048en_US
dc.identifier.urihttp://hdl.handle.net/10141/621995en
dc.description.abstractBackground and Aims - Speciation in angiosperms can be accompanied by changes in floral colour that may influence pollinator preference and reproductive isolation. This study investigates whether changes in floral colour can accompany polyploid and homoploid hybridization, important processes in angiosperm evolution. Methods - Spectral reflectance of corolla tissue was examined for 60 Nicotiana (Solanaceae) accessions (41 taxa) based on spectral shape (corresponding to pigmentation) as well as bee and hummingbird colour perception in order to assess patterns of floral colour evolution. Polyploid and homoploid hybrid spectra were compared with those of their progenitors to evaluate whether hybridization has resulted in floral colour shifts. Key Results- Floral colour categories in Nicotiana seem to have arisen multiple times independently during the evolution of the genus. Most younger polyploids displayed an unexpected floral colour, considering those of their progenitors, in the colour perception of at least one pollinator type, whereas older polyploids tended to resemble one or both of their progenitors. Conclusions - Floral colour evolution in Nicotiana is weakly constrained by phylogeny, and colour shifts do occur in association with both polyploid and homoploid hybrid divergence. Transgressive floral colour in N. tabacum has arisen by inheritance of anthocyanin pigmentation from its paternal progenitor while having a plastid phenotype like its maternal progenitor. Potentially, floral colour evolution has been driven by, or resulted in, pollinator shifts. However, those polyploids that are not sympatric (on a regional scale) with their progenitor lineages are typically not divergent in floral colour from them, perhaps because of a lack of competition for pollinators.en_US
dc.publisherOxford University Press (OUP)en_US
dc.rightsopenAccessen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.titleThe effect of polyploidy and hybridization on the evolution of floral colour in Nicotiana (Solanaceae)en_US
dc.typeJournal Article-
dc.identifier.journalAnnals of Botanyen_US
dc.identifier.volume115en_US
dc.identifier.startpage1117 - 1131 (14)en_US
pubs.organisational-group/Natural History Museum-
pubs.organisational-group/Natural History Museum/Science Group-
pubs.organisational-group/Natural History Museum/Science Group/Functional groups-
pubs.organisational-group/Natural History Museum/Science Group/Functional groups/Research-
pubs.organisational-group/Natural History Museum/Science Group/Functional groups/Research/LS Research-
pubs.organisational-group/Natural History Museum/Science Group/Initiatives-
pubs.organisational-group/Natural History Museum/Science Group/Initiatives/Natural Resources and Hazards-
pubs.organisational-group/Natural History Museum/Science Group/Life Sciences-
dc.embargoNot knownen_US
elements.import.authorMcCarthy, EWen_US
elements.import.authorArnold, SEJen_US
elements.import.authorChittka, Len_US
elements.import.authorLe Comber, SCen_US
elements.import.authorVerity, Ren_US
elements.import.authorDodsworth, Sen_US
elements.import.authorKnapp, Sen_US
elements.import.authorKelly, LJen_US
elements.import.authorChase, MWen_US
elements.import.authorBaldwin, ITen_US
elements.import.authorKovarik, Aen_US
elements.import.authorMhiri, Cen_US
elements.import.authorTaylor, Len_US
elements.import.authorLeitch, ARen_US
dc.description.nhm© The Author 2015. Published by Oxford University Press on behalf of the Annals of Botany Company. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. The attached file is the published version of the article.-
dc.subject.nhmEvolution; Floral colour; Hybridization; Nicotiana; Flower pigmentation; Pollinator shifts; Polyploidy; Solanaceae; Spectral reflectance; Transgressive traits-
This item is licensed under a Creative Commons License
Creative Commons
All Items in The Natural History Museum repository are protected by copyright, with all rights reserved, unless otherwise indicated.