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dc.contributor.author
Pleite, Rafael
dc.contributor.author
Rondanini, Deborah Paola
dc.contributor.author
Garcés, Rafael
dc.contributor.author
Martínez Force, Enrique
dc.date.available
2019-08-06T21:19:15Z
dc.date.issued
2008-09
dc.identifier.citation
Pleite, Rafael; Rondanini, Deborah Paola; Garcés, Rafael; Martínez Force, Enrique; Day-night variation in fatty acids and lipids biosynthesis in sunflower seeds; Crop Science Society of America; Crop Science; 48; 5; 9-2008; 1952-1957
dc.identifier.issn
0011-183X
dc.identifier.uri
http://hdl.handle.net/11336/81041
dc.description.abstract
It is well known that fatty acid biosynthesis in leaves is closely related to photosynthesis; although a residual synthesis is also detected at night. But less known is the effect of the day-night cycle in fatty acid biosynthesis in heterotrophic tissues such as developing seeds. Through the use of radioactive precursors, we detected variations in the metabolism of fatty acids and lipids during the day-night period in sunflower (Helianthus annuus L.) seeds. These oscillations have been observed both in the fatty acids bound to triacylglycerols and in polar lipids, indicating a fine regulation of the lipids biosynthetic activities in sunflower developing seeds. Additionally, in the triacylglycerol fraction, periodic variations were observed in the oleic and linoleic acids content as a consequence of qualitative variations in the biosynthetic machinery during the day-night period related to temperature changes. Analyzing the rate of oleic acid desaturation, we observed a significant increase in activity in the middle of the night, indicative of the importance of nocturnal desaturation. Similar variations were also observed in the stearoyl-acyl carrier protein (ACP) desaturase activity. This study has shown the variation in the lipid biosynthetic capacity in sunflower developing seeds during the day-night cycle - including control over individual enzymes such as the stearoyl-ACP desaturase-and the influence of diurnal and nocturnal temperatures in the quality (oleic/linoleic ratio) of the oil.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Crop Science Society of America
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Sunflower
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Fatty Acid
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Day-Night Cycle
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Circadiam Rithm
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Agricultura
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Agricultura, Silvicultura y Pesca
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CIENCIAS AGRÍCOLAS
dc.title
Day-night variation in fatty acids and lipids biosynthesis in sunflower seeds
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-08-06T14:19:41Z
dc.journal.volume
48
dc.journal.number
5
dc.journal.pagination
1952-1957
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Baltimore
dc.description.fil
Fil: Pleite, Rafael. Consejo Superior de Investigaciones Científicas; España
dc.description.fil
Fil: Rondanini, Deborah Paola. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Biología Aplicada y Alimentos. Cátedra de Fisiología Vegetal; Argentina
dc.description.fil
Fil: Garcés, Rafael. Consejo Superior de Investigaciones Científicas; España
dc.description.fil
Fil: Martínez Force, Enrique. Consejo Superior de Investigaciones Científicas; España
dc.journal.title
Crop Science
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.2135/cropsci2007.11.0645
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://dl.sciencesocieties.org/publications/cs/abstracts/48/5/1952
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