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Chemocoding as an identification tool where morphological- and DNA-based methods fall short: Inga as a case study.

María-José Endara1,2, Phyllis D Coley1,3, Natasha L Wiggins4

  • 1Department of Biology, University of Utah, Salt Lake City, UT, 84112-0840, USA.

The New Phytologist
|February 14, 2018
PubMed
Summary
This summary is machine-generated.

Chemical fingerprinting, or chemocoding, offers a powerful new method for plant identification, especially in diverse tropical ecosystems. This technique accurately distinguishes plant species where DNA barcoding falls short, aiding biodiversity research.

Keywords:
Ingachemocodingmetabolomicsspecies identificationtropical forests

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Area of Science:

  • Botany
  • Metabolomics
  • Chemotaxonomy

Background:

  • Accurate plant species identification is crucial for taxonomy and conservation.
  • DNA barcoding faces limitations in distinguishing species within species-rich genera, particularly in tropical regions.

Purpose of the Study:

  • To evaluate the potential of chemical fingerprinting (chemocoding) as a robust method for plant identification in challenging tropical biomes.
  • To assess the efficacy of chemocoding for distinguishing morphologically similar species and identifying widespread species across geographic scales.

Main Methods:

  • Employed untargeted metabolomics to generate chemical profiles of plant species.
  • Utilized multivariate analysis to construct species-level fingerprints, defining the chemocoding approach.
  • Applied chemocoding to the neotropical genus Inga (Leguminosae) at single sites and across continental ranges.

Main Results:

  • Chemocoding demonstrated robustness in distinguishing morphologically similar species within the genus Inga at local scales.
  • The method proved effective for identifying widespread Inga species across broad geographic ranges.
  • Results highlight chemocoding's potential as a complementary identification tool where traditional methods are insufficient.

Conclusions:

  • Chemical fingerprinting (chemocoding) is a valuable and robust method for plant identification, particularly in species-rich tropical genera.
  • Chemocoding provides an essential additional data source for accurate plant identification, crucial for biodiversity research and conservation efforts.
  • This technique addresses limitations of DNA barcoding in challenging taxonomic groups and environments.