Glucosinolate survey of cultivated and feral mashua (Tropaeolum tuberosum Ruíz & PavÓn) in the Cuzco region of Peru uri icon

abstract

  • CONTENIDO DE GLUCOSINOLATOS EN MASHUAS (TROPAEOLUM TUBEROSUM RUIZ & PAVON) CULTIVADAS Y SILVESTRES DE LA RAGION DEL CUSCO, PERU. Se identifico y cuantifico mediante "High Performance Liquid Chromatograph" los glucosinolatos (GSL) presentes en mashua cultivada (Tropaeolum tuberosum Ruiz & Pavon) y sus parientes silvestres. Los compuestos principales descubiertos fueron los siguentes glucosinolatos aromaticos: 4-Hydroxybenzyl GSL (OHB, Glucosinalbin), Benzyl GSL (B, Glucotropaeolin) y m-Methoxybenzyl GSL (MOB, Glucolimnathin). El contenido total de GSL fluctuo entre 0.27 a 50.74 mu Mol/g de tejido del tuberculo seco. La mayoria de las accesiones con bajo contenido de GSL estuvieron distribuidos dentro de la poblacion cultivada con una concentracion total de GSL menor a 5.00 mu Mol/g de tejido del tuberculo seco, mientras que el mas alto contenido total (mas de 25.00 mu Mol/g de tejido del tuberculo seco) y la mas alta concentracion de GSL individuales (OHB, B y MOB) se observo en la poblacion silvestre con pocas excepciones. Ademas, seis fenotipos de GSL diferentes fueron determinados: Solo MOB; solo B; OHB y B; OHB y MO; B y MOB; y OHB, B y MOB.
  • Oscar R. Ortega (Centro Regional de Investigacion en Biodiversidad Andina-CRIBA, Universidad Nacional San Antonio Abad del Cusco, Peru), Daniel J. Kliebenstein (Department Of Plant Sciences, University of California, Davis, CA 95616), Carlos Arbizu (International Potato Center POB 1558, Lima 12, Peru), Ramiro Ortega (Centro Regional de Investigacion en Biodiversidad Andina-CRIBA, Universidad Nacional San Antonio Abad del Cusco, Peru), and Carlos E Quiros (Corresponding author Department of Plant Sciences, University of California, Davis, CA 95616, e-mail: cfquiros@ucdavis.edu). GLUCOSINOLATE SURVEY OF CULTIVATED AND FERAL MASHUA (TROPAEOLUM TUBEROSUM RUIZ & PAVON) IN THE CUZCO REGION OF PERU. Economic Botany 60(3):254-264, 2006 Glucosinolates (GSL) present in cultivated and feral accessions of mashua (Tropaeolum tuberosum Ruiz & Pavon) were identified and quantified by High Performance Liquid Chromatography (HPLC) analysis. The main glucosinolates detected were aromatic: 4-Hydroxybenzyl GSL (OHB, Glucosinalbin), Benzyl GSL (B, Glucotropaeolin), and m-Methoxybenzyl GSL (MOB, Glucolimnathin). The total amount of GSL observed ranged from 0.27 to 50.74 micromols per gram (mu Mol/g) of dried tuber tissue. Most of the low-content GSL accessions are distributed within the cultivated population with a total GSL concentration lower than 5.00 mu Mol/g of dried tuber tissue. The highest total and specific GSL (OHB, B, and MOB) contents (more than 25.00 mu Mol/g of dried tuber tissue) were observed in the feral population with few exceptions. In addition, only six different GSL profiles were found: Only MOB; only B; OHB and B; OHB and MOB; B and MOB; and OHB, B and MOB.

publication date

  • 2006
  • 2006