Aclimatación a la alta temperatura y tolerancia al calor (TL50) en 6 variedades de chenopodium quinoa

Kimberlayn M.A. Sanabría, Herbert O.R. Lazo

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

2 Citas (Scopus)

Resumen

The capacity of acclimatization at high temperature of 6 varieties (Kancolla, Salcedo, Ccoito, Negra collana, Pasancalla and Illpa) of Chenopodium quinoa Willd was studied. Quinoa plants were obtained from seeds, which grew in pots, in a grennhouse, until the phenological stage of 6 true leaves. These were exposed to a heat treatment in a growth chamber with a thermostat at 34/32 °C day/night (D/N) for 3 days and at low light intensity. The non-acclimated plants grew under the same conditions but at temperature of 22/20 °C D/N. The tolerance to high temperature was determined by exposing leaf discs at different times (8, 16, 32 and 64 min) at 50 °C (warm bath), measuring the thermostability of the cell membrane trough the loss of electrolytes with a conductimeter. The degree of thermotolerance was found according to the TL50 (time lethal to 50% of damage). The results showed that the varieties Pasancalla and Illpa presented acclimatization capacity, the most thermotolerant variety was the variety Illpa TL50 = 64 min when it was acclimatized and the most sensitive was Pasancalla TL50 = 8 min when it was not acclimatized. It was also observed that the percentage of cell damage increased as the exposure time to the high temperature was higher.

Título traducido de la contribuciónHigh temperature acclimation and termotolerance (TL50) in 6 varieties of chenopodium quinua
Idioma originalEspañol
Páginas (desde-hasta)147-152
Número de páginas6
PublicaciónRevista Peruana de Biologia
Volumen25
N.º2
DOI
EstadoPublicada - may. 2018

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Palabras clave

  • Acclimatization
  • Chenopodium quinoa
  • Heat stress
  • TL50
  • Termotolerant

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