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Journal of Food Measurement and Characterization

, Volume 13, Issue 3, pp 2310–2317 | Cite as

Identification and quantification of anthocyanins in seeds of Kersting’s groundnut [Macrotyloma geocarpum (Harms) Marechal & Baudet] landraces of varying seed coat pigmentation

  • Armelle T. TsamoEmail author
  • Mustapha Mohammed
  • Peter P. Ndibewu
  • Felix D. DakoraEmail author
Original Paper

Abstract

The present study identified and quantified the anthocyanin pigments in seed of eight Kersting’s groundnut [Macrotyloma geocarpum (Harms) Marechal & Baudet] landraces of variable seed coat pigmentation. The analysis was carried out using ultra-performance liquid chromatography coupled with a photodiode array detector and mass spectrometry. Although the findings revealed similar anthocyanin profiles in seeds of the eight landraces tested, the relative concentrations of the individual anthocyanin compounds showed marked variations. Delphinidin-3-O-glucoside, cyanidin-3-O-glucoside and peonidin-3-O-glucoside were the most abundant anthocyanins, with concentrations ranging between 21.4–239.0, 23.6–130.6 and 21.4–135.4 µg/g of dry seed, respectively in seeds of the test landraces, while total anthocyanins ranged between 95 and 505 µg/g of dry seed. The preponderance of delphinidin 3-O-glucoside was observed in the black and brown mottled seeds. This study is the first report regarding the profile and concentrations of anthocyanins in Kersting’s groundnut and suggests that the seeds of this underutilized grain legume can potentially be exploited as a natural source of anthocyanins for the development of cosmetic, food and pharmaceutical products.

Keywords

Kersting’s groundnut UPLC–DAD–qTOF-MS Anthocyanins Natural antioxidants Colorants 

Abbreviations

KG

Kersting’s groundnuts

ESI

Electrospray ionization

LC

Liquid chromatography

MS

Mass spectrometry

PDA

Photodiode array detector

SD

Standard deviation

TAC

Total anthocyanin content

UV

Ultraviolet

Vis

Visible

Notes

Acknowledgements

We are grateful to the South African Research Chair in Agrochemurgy and Plant Symbioses, the National Research Foundation and the Tshwane University of Technology for financial support. ATT is postdoctoral fellow under the South African Research Chair in Agrochemurgy and Plant Symbioses.

Compliance with ethical standards

Conflict of interest

The authors declare no conflict of interest.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of ChemistryTshwane University of TechnologyPretoriaSouth Africa
  2. 2.Department of Organic ChemistryUniversity of Yaoundé IYaoundeCameroon
  3. 3.Department of Crop SciencesTshwane University of TechnologyPretoriaSouth Africa
  4. 4.Tshwane University of TechnologyPretoriaSouth Africa

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