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Temperature-related non-homogeneous fatty acid desaturation in sunflower (Helianthus annuus L.) seeds.
Planta. 2003 Mar; 216(5):834-40.P

Abstract

The fatty acid compositions of half-seeds and whole seeds of the temperature-dependent high-stearic-acid sunflower (Helianthus annuus L.) mutant CAS-14 were unexpectedly different. We found that there is a longitudinal gradient starting from the embryo up to the end of the cotyledon. The stearic acid content varied from 9.7 to 34.6% in seeds produced in a growth chamber (39/24 degrees C; day/night), and from 14.0 to 34.4% in seeds produced in the field during the summer season (35-40 degrees C in daylight and 20-25 degrees C at night). The gradient occurs throughout seed formation, and is due to a spatial and non-temporal regulation of stearic acid desaturation. A similar temperature-regulated behaviour, but for oleic and linoleic acid contents, was found in normal sunflower seeds. Since the deposition of oil bodies was homogeneous during seed formation, seeds showed the gradient throughout their development. This non-homogeneous distribution must be due to differences in the enzymatic pathway of de-novo fatty acid desaturation along the seed, resembling a morphogen gradient. Other high-stearic-acid mutant lines, such as CAS-3, did not show any gradient. This is the first time that a gradient and an inheritable maternal control of the fatty acid composition have been found in oilseeds.

Authors+Show Affiliations

Instituto de la Grasa, Consejo Superior de Investigaciones Científicas, Av. Padre García Tejero 4, 41012 Sevilla, Spain.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

12624771

Citation

Fernández-Moya, Valle, et al. "Temperature-related Non-homogeneous Fatty Acid Desaturation in Sunflower (Helianthus Annuus L.) Seeds." Planta, vol. 216, no. 5, 2003, pp. 834-40.
Fernández-Moya V, Martínez-Force E, Garcés R. Temperature-related non-homogeneous fatty acid desaturation in sunflower (Helianthus annuus L.) seeds. Planta. 2003;216(5):834-40.
Fernández-Moya, V., Martínez-Force, E., & Garcés, R. (2003). Temperature-related non-homogeneous fatty acid desaturation in sunflower (Helianthus annuus L.) seeds. Planta, 216(5), 834-40.
Fernández-Moya V, Martínez-Force E, Garcés R. Temperature-related Non-homogeneous Fatty Acid Desaturation in Sunflower (Helianthus Annuus L.) Seeds. Planta. 2003;216(5):834-40. PubMed PMID: 12624771.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Temperature-related non-homogeneous fatty acid desaturation in sunflower (Helianthus annuus L.) seeds. AU - Fernández-Moya,Valle, AU - Martínez-Force,Enrique, AU - Garcés,Rafael, Y1 - 2002/11/09/ PY - 2002/05/13/received PY - 2002/10/08/accepted PY - 2003/3/8/pubmed PY - 2003/6/21/medline PY - 2003/3/8/entrez SP - 834 EP - 40 JF - Planta JO - Planta VL - 216 IS - 5 N2 - The fatty acid compositions of half-seeds and whole seeds of the temperature-dependent high-stearic-acid sunflower (Helianthus annuus L.) mutant CAS-14 were unexpectedly different. We found that there is a longitudinal gradient starting from the embryo up to the end of the cotyledon. The stearic acid content varied from 9.7 to 34.6% in seeds produced in a growth chamber (39/24 degrees C; day/night), and from 14.0 to 34.4% in seeds produced in the field during the summer season (35-40 degrees C in daylight and 20-25 degrees C at night). The gradient occurs throughout seed formation, and is due to a spatial and non-temporal regulation of stearic acid desaturation. A similar temperature-regulated behaviour, but for oleic and linoleic acid contents, was found in normal sunflower seeds. Since the deposition of oil bodies was homogeneous during seed formation, seeds showed the gradient throughout their development. This non-homogeneous distribution must be due to differences in the enzymatic pathway of de-novo fatty acid desaturation along the seed, resembling a morphogen gradient. Other high-stearic-acid mutant lines, such as CAS-3, did not show any gradient. This is the first time that a gradient and an inheritable maternal control of the fatty acid composition have been found in oilseeds. SN - 0032-0935 UR - https://www.unboundmedicine.com/medline/citation/12624771/Temperature_related_non_homogeneous_fatty_acid_desaturation_in_sunflower__Helianthus_annuus_L___seeds_ DB - PRIME DP - Unbound Medicine ER -