Thermal behavior of calafate (Berberis buxifolia) seeds
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 s...
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| Lenguaje: | English |
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Universidad Austral de Chile, Facultad de Ciencias Forestales
2016
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oai:scielo:S0717-920020160003000192019-10-24Thermal behavior of calafate (Berberis buxifolia) seedsMartín-Ramos,PabloMartín-Gil,JesúsRamos-Sánchez,María del CarmenHernández-Navarro,SalvadorMartín-Gil,Francisco Javier α-linolenic acid calafate DSC FTIR seeds 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.info:eu-repo/semantics/openAccessUniversidad Austral de Chile, Facultad de Ciencias ForestalesBosque (Valdivia) v.37 n.3 20162016-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002016000300019en10.4067/S0717-92002016000300019 |
| institution |
Scielo Chile |
| collection |
Scielo Chile |
| language |
English |
| topic |
α-linolenic acid calafate DSC FTIR seeds |
| spellingShingle |
α-linolenic acid calafate DSC FTIR seeds Martín-Ramos,Pablo Martín-Gil,Jesús Ramos-Sánchez,María del Carmen Hernández-Navarro,Salvador Martín-Gil,Francisco Javier Thermal behavior of calafate (Berberis buxifolia) seeds |
| description |
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. |
| author |
Martín-Ramos,Pablo Martín-Gil,Jesús Ramos-Sánchez,María del Carmen Hernández-Navarro,Salvador Martín-Gil,Francisco Javier |
| author_facet |
Martín-Ramos,Pablo Martín-Gil,Jesús Ramos-Sánchez,María del Carmen Hernández-Navarro,Salvador Martín-Gil,Francisco Javier |
| author_sort |
Martín-Ramos,Pablo |
| title |
Thermal behavior of calafate (Berberis buxifolia) seeds |
| title_short |
Thermal behavior of calafate (Berberis buxifolia) seeds |
| title_full |
Thermal behavior of calafate (Berberis buxifolia) seeds |
| title_fullStr |
Thermal behavior of calafate (Berberis buxifolia) seeds |
| title_full_unstemmed |
Thermal behavior of calafate (Berberis buxifolia) seeds |
| title_sort |
thermal behavior of calafate (berberis buxifolia) seeds |
| publisher |
Universidad Austral de Chile, Facultad de Ciencias Forestales |
| publishDate |
2016 |
| url |
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002016000300019 |
| work_keys_str_mv |
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| _version_ |
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