Cambios relacionados con el «daño por frío» en ácidos grasos de fosfolípidos de la membrana plasmática y antioxidantes naturales de Jicama (Pachyrhizus erosus)

• García, Rafael ^[1] ; Mercado Silva, Edmundo ^[2]
  1. [1] Universidad del Magdalena

     Universidad del Magdalena

     Colombia

     
  2. [2] Universidad Autónoma de Querétaro

     Universidad Autónoma de Querétaro

     México

     
• Localización: Intropica: Revista del Instituto de Investigaciones Tropicales, ISSN-e 2389-7864, ISSN 1794-161X, Vol. 1, Nº. 1, 2004, págs. 29-37
• Idioma: español
• Títulos paralelos:
  • Chilling injury and changes in fatty acids of phospholipids and natural antioxidants of plasma memrane of jicama (Pachyrhizus erosus)
• Enlaces
  • Texto completo (pdf)
• Resumen

  • The objective of this study was to evaluate chilling susceptibility of Jícama (Pachyrhuzus erosus) cultivars, San Miguelito and Vega de San Juan stored at 10°C and 13°C.  The plasma membrane from those cultivars were extracted and analyzed for phospholipids, fatty acids and a-Tocopherol.  The ascorbic acid, was analyzed at tissue level, a-Tocopherol and ascorbic acid content decreased 71-79% and 46-29% in San Miguelito, and Vega de San Juan cultivars respectively.  Phosphatydilcoline (PC) also decreased 32 and 71% in both cultivars.  This results indicated that during cold storage, there were loss of membrane and oxidative stress because of incapability of tissue to regenerate a-Tocopherol and ascorbic acid.