Phytochemical Characterization of Twenty-Seven Peruvian Mashua (Tropaeolum tuberosum Ruíz & Pavón) Morphotypes and the Effect of Postharvest Methyl Jasmonate Application on the Accumulation of Antioxidants

Daniel A. Jacobo-Velázquez, Gilmar Peña-Rojas, Luis Ernesto Paredes-Avila, Vidalina Andía-Ayme, Ana Mariel Torres-Contreras, Oscar Herrera-Calderon

Research output: Contribution to journalArticlepeer-review

Abstract

Tropaeolum tuberosum Ruíz and Pav. “Mashua” is a crop from the Andean region associated with preventing chronic degenerative diseases. This study evaluated the content of bioactive compounds (phenolics, glucosinolates, carotenoids, and ascorbic acid) in twenty-seven Peruvian mashua morphotypes. Furthermore, three morphotypes (MAC 067, MAC 092, and MAC 123) were selected to evaluate further the effect of methyl jasmonate (MeJA) on the accumulation of bioactive compounds. Phenolic content in the mashua morphotypes ranged from 2990.76 ± 273.5 mg/kg to 24,217.36 ± 1144 mg/kg; whereas carotenoids ranged from 12.8 ± 0.6 mg/kg to 85.8 ± 3.1 mg/kg. Moreover, total glucosinolate content ranged from 65 ± 11 mmol/kg to 1289 ± 65 mmol/kg. The different mashua morphotypes showed low levels of ascorbic acid (lower than 5 mg/kg) compared with other crops. Except for glucosinolates, MeJA application augmented the level of bioactive compounds, showing increases of up to 150.1%, 535.0%, and 542% for total phenolics, carotenoids, and ascorbic acid, respectively. Results indicated that mashua is an excellent source of phenolics and glucosinolates, whereas it contains adequate levels of carotenoids and low levels of vitamin C. MeJA application during postharvest represented a simple approach to increase the content of bioactive compounds in mashua.

Original languageEnglish
Article number471
JournalHorticulturae
Volume8
Issue number6
DOIs
StatePublished - Jun 2022
Externally publishedYes

Bibliographical note

Funding Information:
Funding: This study was supported by funds from Tecnologico de Monterrey (Bioprocess Research Group), and by the Ministry of Education (MINEDU) and the National Council of Science, Technology and Technological Innovation from Perú (CONCYTEC), through the Grant 199-2015-FONDECYT– UNSCH.

Publisher Copyright:
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.

Keywords

  • abiotic stresses
  • ascorbic acid
  • bioactive compound
  • carotenoids
  • glucosinolates
  • healthy foods
  • mashua
  • methyl jasmonate
  • phenolics

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