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| Format: | Artículo científico |
| Langue: | en |
| Publié: |
Universidad Austral de Chile
2016
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| Accès en ligne: | https://www.redalyc.org/articulo.oa?id=173149194019 |
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Table des matières:
- Thermal behavior of calafate (Berberis buxifolia) seeds Pablo Martín-Ramos Jesús Martín-Gil María del Carmen Ramos-Sánchez Salvador Hernández-Navarro Francisco Javier Martín-Gil Agrociencias DSC FTIR seeds calafate linolenic acid Low temperature is the most important factor limiting the distribution of plants. In this study the low temperature thermal behavior of calafate seeds was analyzed by Differential Scanning Calorimetry (DSC), and a vibrational characterization of their different components was conducted by infrared spectroscopy (FTIR). In cold-acclimated plants, such as calafate, the total percentage of polyunsaturated fatty acids in their seeds is significantly higher than that of saturated fatty acids. Successive freezing-thawing cycles lead to increased formation of linoleic (LA) and linolenic (LNA) α-crystals. This process would barely modify the phase-transition temperature of the lipid membrane but would lead to an increase in the membrane fluidity (LNA would make the cell membranes more fluid during seed development). It seems that processes in membranes rather than in the glassy cytoplasm may determine the cooling resistance. 2016 artículo científico 0304-8799 https://www.redalyc.org/articulo.oa?id=173149194019 en http://www.redalyc.org/revista.oa?id=1731 Bosque application/pdf Universidad Austral de Chile Bosque (Chile) Num.3 Vol.37