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Parallel evolution at multiple levels in the origin of hummingbird pollinated flowers in Ipomoea.

Publication ,  Journal Article
Des Marais, DL; Rausher, MD
Published in: Evolution; international journal of organic evolution
July 2010

A transition in flower color accompanying a shift in pollinator guilds is a prominent and repeated adaptation in angiosperms. In many cases, shifts to similar pollinators are associated with similar flower-color transitions. The extent to which this parallelism at the phenotypic level results from parallel changes at the biochemical, developmental, and genetic levels, however, remains an open question. There have been few attempts to determine whether parallelism at these lower levels results from mutation bias or fixation bias of different classes of mutation. We address these issues by examining the biochemical, developmental, and genetic changes that have occurred in red-flowering species of the Mina lineage of morning glories (Ipomoea) and compare these to the changes reported for I. horsfalliae, which has independently evolved red flowers. Using transgenic techniques, we demonstrate that the transition from blue to red flowers in Mina species is due primarily to down-regulation of the enzyme flavonol-3'-hydroxylase (F3'H) in flowers but not in vegetative tissues, and that this down-regulation is at least partly due to cis-regulatory change in the gene for F3'H. These changes are similar to those exhibited by I. horsfalliae, indicating parallelism at the biochemical and developmental levels, and possibly at the genetic level.

Duke Scholars

Published In

Evolution; international journal of organic evolution

DOI

EISSN

1558-5646

ISSN

0014-3820

Publication Date

July 2010

Volume

64

Issue

7

Start / End Page

2044 / 2054

Related Subject Headings

  • Species Specificity
  • Polymerase Chain Reaction
  • Pollination
  • Pigmentation
  • Mixed Function Oxygenases
  • Ipomoea
  • Gene Expression Regulation, Plant
  • Gene Dosage
  • Flowers
  • Flavonols
 

Citation

APA
Chicago
ICMJE
MLA
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Des Marais, D. L., & Rausher, M. D. (2010). Parallel evolution at multiple levels in the origin of hummingbird pollinated flowers in Ipomoea. Evolution; International Journal of Organic Evolution, 64(7), 2044–2054. https://doi.org/10.1111/j.1558-5646.2010.00972.x
Des Marais, David L., and Mark D. Rausher. “Parallel evolution at multiple levels in the origin of hummingbird pollinated flowers in Ipomoea.Evolution; International Journal of Organic Evolution 64, no. 7 (July 2010): 2044–54. https://doi.org/10.1111/j.1558-5646.2010.00972.x.
Des Marais DL, Rausher MD. Parallel evolution at multiple levels in the origin of hummingbird pollinated flowers in Ipomoea. Evolution; international journal of organic evolution. 2010 Jul;64(7):2044–54.
Des Marais, David L., and Mark D. Rausher. “Parallel evolution at multiple levels in the origin of hummingbird pollinated flowers in Ipomoea.Evolution; International Journal of Organic Evolution, vol. 64, no. 7, July 2010, pp. 2044–54. Epmc, doi:10.1111/j.1558-5646.2010.00972.x.
Des Marais DL, Rausher MD. Parallel evolution at multiple levels in the origin of hummingbird pollinated flowers in Ipomoea. Evolution; international journal of organic evolution. 2010 Jul;64(7):2044–2054.
Journal cover image

Published In

Evolution; international journal of organic evolution

DOI

EISSN

1558-5646

ISSN

0014-3820

Publication Date

July 2010

Volume

64

Issue

7

Start / End Page

2044 / 2054

Related Subject Headings

  • Species Specificity
  • Polymerase Chain Reaction
  • Pollination
  • Pigmentation
  • Mixed Function Oxygenases
  • Ipomoea
  • Gene Expression Regulation, Plant
  • Gene Dosage
  • Flowers
  • Flavonols