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Article
Developmental Changes in the Metabolic Network of Snapdragon Flowers
PLoS ONE
  • Joelle K. Muhlemann, Purdue University, West Lafayette, IN, USA
  • Hiroshi Maeda, Purdue University, West Lafayette, IN, USA
  • Ching-Yun Chang, Purdue University, West Lafayette, IN, USA
  • Phillip San Miquel, Purdue University, West Lafayette, IN, USA
  • Ivan Baxter, Purdue University, West Lafayette, IN, USA
  • Bruce Cooper, Purdue University, West Lafayette, IN, USA
  • Ann Perera, Iowa State University
  • Basil Nikolau, Iowa State University
  • Olga Vitek, Purdue University, West Lafayette, IN, USA
  • John A. Morgan, Purdue University, West Lafayette, IN, USA
  • Natalia Dudareva, Purdue University, West Lafayette, IN, USA
Document Type
Article
Publication Version
Published Version
Publication Date
1-1-2012
DOI
10.1371/journal.pone.0040381
Abstract
Evolutionary and reproductive success of angiosperms, the most diverse group of land plants, relies on visual and olfactory cues for pollinator attraction. Previous work has focused on elucidating the developmental regulation of pathways leading to the formation of pollinator-attracting secondary metabolites such as scent compounds and flower pigments. However, to date little is known about how flowers control their entire metabolic network to achieve the highly regulated production of metabolites attracting pollinators. Integrative analysis of transcripts and metabolites in snapdragon sepals and petals over flower development performed in this study revealed a profound developmental remodeling of gene expression and metabolite profiles in petals, but not in sepals. Genes up-regulated during petal development were enriched in functions related to secondary metabolism, fatty acid catabolism, and amino acid transport, whereas down-regulated genes were enriched in processes involved in cell growth, cell wall formation, and fatty acid biosynthesis. The levels of transcripts and metabolites in pathways leading to scent formation were coordinately up-regulated during petal development, implying transcriptional induction of metabolic pathways preceding scent formation. Developmental gene expression patterns in the pathways involved in scent production were different from those of glycolysis and the pentose phosphate pathway, highlighting distinct developmental regulation of secondary metabolism and primary metabolic pathways feeding into it.
Comments

This is an article from PLoS ONE 7 (2012): 1, doi:10.1371/journal.pone.0040381. Posted with permission.

Rights
This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Copyright Owner
Muhlemann et al.
Language
en
File Format
application/pdf
Citation Information
Joelle K. Muhlemann, Hiroshi Maeda, Ching-Yun Chang, Phillip San Miquel, et al.. "Developmental Changes in the Metabolic Network of Snapdragon Flowers" PLoS ONE Vol. 7 Iss. 7 (2012) p. 1 - 15
Available at: http://works.bepress.com/basil-nikolau/1/