Evaluation of wild sunflower (Helianthus) species for high content and stability of linoleic acid in the seed oil

1991 ◽  
Vol 116 (3) ◽  
pp. 359-367 ◽  
Author(s):  
A. De Haro ◽  
J. Fernandez-Martinez
Keyword(s):  
Linoleic Acid ◽  
Acid Content ◽  
Seed Oil ◽  
Oil Quality ◽  
Linoleic Acid Content ◽  
Seed Formation ◽  
Warm Environment ◽  
Mean Temperature ◽  
Breeding Programmes ◽  
Helianthus Species

SUMMARYA collection of 168 accessions belonging to 62 species and subspecies was evaluated in Cordoba, Spain, in 1985 for fatty acid composition of the seed oil. Linoleic acid content of seed produced in Cordoba (mean temperature during seed formation 27·9 °C) was compared with that of seed obtained under much cooler environmental conditions in Montpellier, France, (mean temperature 19·5 °C). Linoleic acid content ranged from 27·3 to 83·7% in the warm environment and from 45·9 to 88·7% in the cool environment with average values of 64·3% and 75·0%, respectively. Twenty-three species with linoleic acid values of > 70% in both environments were evaluated again, in 1989 in Cordoba (mean temperature 31 °C). Twelve wild species showed consistently high and more stable linoleic acid contents than the cultivated control and could be readily used in breeding programmes to improve oil quality.

Environmental influence on sunflower achene growth, oil content and oil quality

1979 ◽  
Vol 19 (96) ◽  
pp. 82 ◽  
Author(s):  
PJ Goyne ◽  
BW Simpson ◽  
DR Woodruff ◽  
JD Churchett
Keyword(s):  
Linoleic Acid ◽  
Acid Content ◽  
Oil Content ◽  
Environmental Influence ◽  
Oil Quality ◽  
Dry Weight ◽  
Linoleic Acid Content ◽  
Research Station ◽  
Climatic Data ◽  
Mean Temperature

Achenes of the open-pollinated sunflower cultivar Sunfola 68-2 and the hybrid Hysun-30 were sampled at seven day intervals following first anthesis in December and April plantings at Biloela Research station in Central Queensland during 1975. For both sowing times, Sunfola 68-2 had reached maximum achene dry weight, oil and linoleic acid content by 800 growing degree days (GDD) (base -1.3�C) after first anthesis and Hysun-30 by 900 GDD (base -5.g�C). The corresponding achene moisture contents were 32.1% and 34.2%, respectively. Using this information, relations were established between oil content, linoleic acid and climatic data obtained from a number of plantings made at Emerald and Biloela in Central Queensland. Although there were significant relations between oil content and temperature, other plant and environmental factors were found to be more important in the determination of the final oil content. Linoleic acid content of Sunfola 68-2 at harvest was best related to mean temperature between 300 and 800 GDD following first anthesis in the form: Y = 63.41 + 2.46X - 0.10X2 (R2 = 79.4, P < 0.01) where X is the mean temperature 300 to 800 GDD after 50% flowering. This equation explained 80% of the variation in linoleic acid content of achenes obtained from 16 independent plantings made at Biloela from 1972 to 1975, and a range of linoleic acid from 55 to 78%. Linoleic acid for Hysun-30 was significantly correlated with both average mean and mean minimum temperatures from 300 to 900 GDD after 50% flowering. The formulation of these relations and use of the findings in the early harvesting of sunflowers and in studying planting times is discussed.

The molecular basis of the high linoleic acid content in Petunia seed oil: analysis of a seed-specific linoleic acid mutant

2000 ◽  
Vol 28 (6) ◽  
pp. 631-632 ◽  
Author(s):  
I. Verwoert ◽  
Y. Meller-Harel ◽  
K. van der Linden ◽  
B. Verbree ◽  
R. Koes ◽  
...  
Keyword(s):  
Linoleic Acid ◽  
Acid Content ◽  
Seed Oil ◽  
Lipid Fraction ◽  
Lipid Synthesis ◽  
Linoleic Acid Content ◽  
Specific Expression ◽  
High Linoleic Acid ◽  
High Linoleic Acid Content ◽  
Δ12 Desaturase

From a random transposon mutagenesis experiment, using Petunia line W138, a seed-specific linoleic acid mutant was isolated. The tagged gene was cloned and identified as a microsomal Δ12 desaturase. Expression of the gene, however, was constitutive and not, as might have been expected, seed-specific. Moreover, self-fertilized homozygous mutants still contain 40% 18:2 in the seed lipid fraction. This suggests that at least two (seedspecific) Δ12 desaturase genes are responsible for the high linoleic acid content in Petunia seed oil. Five members of the microsomal Δ12 desaturase gene family have been identified and isolated. Data are presented on the molecular characterization and tissue-specific expression of these genes, which suggest that, in Petunia the flux through the prokaryotic and eukaryotic pathways of lipid synthesis might be different from the situation found in Arabidopsis.

Growth Temperature Control of the Linoleic Acid Content in Safflower (Carthamus tinctorius) Seed Oil

2004 ◽  
Vol 52 (2) ◽  
pp. 332-336 ◽  
Author(s):  
A. Belén Esteban ◽  
M. Dolores Sicardo ◽  
Manuel Mancha ◽  
José M. Martínez-Rivas
Keyword(s):  
Linoleic Acid ◽  
Temperature Control ◽  
Growth Temperature ◽  
Acid Content ◽  
Seed Oil ◽  
Carthamus Tinctorius ◽  
Linoleic Acid Content

Investigation on the Extraction and Conjugate of Linoleic Acid of Purple Medic Seed

2011 ◽  
Vol 347-353 ◽  
pp. 3337-3340
Author(s):  
Shu Ting Qi ◽  
Yu Xin Shi ◽  
Ming Dong ◽  
Hong Qing Wu ◽  
Di Mu
Keyword(s):  
Fatty Acid Composition ◽  
Linoleic Acid ◽  
Solvent Extraction ◽  
Seed Oil ◽  
Extraction Efficiency ◽  
Oil Quality ◽  
Total Lipids ◽  
Solvent Type ◽  
Effects Of Temperature

Methods currently used for the quantitative determination of total lipids and fatty acid composition in plant require solvent extraction. This study examined the solvent extraction of purple medic seed oil. Results varied with different extraction conditions. The effects of temperature, extraction time, sample size and solvent type on the extraction efficiency and oil quality were studied. The amount of extract collected was highest when ether absolute was used as a solvent for solvent extraction.

Enhancement of linoleic acid content stimulates astaxanthin esterification in Coelastrum sp.

2020 ◽  
Vol 300 ◽  
pp. 122649 ◽  
Author(s):  
Zhiyong Liu ◽  
Yuyong Hou ◽  
Chunqing He ◽  
Xuan Wang ◽  
Shulin Chen ◽  
...  
Keyword(s):  
Linoleic Acid ◽  
Acid Content ◽  
Linoleic Acid Content

Laboratory Evaluation of Larvicidal and Oviposition Deterrent Properties of Edible Plant Oils for Potential Management of Aedes aegypti (Diptera: Culicidae) in Drinking Water Containers

2019 ◽  
Vol 56 (4) ◽  
pp. 1055-1063
Author(s):  
Teresia M Njoroge ◽  
May R Berenbaum
Keyword(s):  
Linoleic Acid ◽  
Aedes Aegypti ◽  
Acid Content ◽  
Edible Oils ◽  
Linoleic Acid Content ◽  
Laboratory Evaluation ◽  
Plant Oils ◽  
Edible Plant ◽  
Oviposition Deterrents ◽  
Olive Oils

Abstract The yellow fever mosquito, Aedes aegypti (Diptera: Culicidae) transmits several devastating arboviruses, including dengue, chikungunya, and Zika virus, making development of inexpensive and eco-friendly strategies for its control an urgent priority. We evaluated the lethality of 13 commonly used plant-derived edible oils against late-third instar Ae. aegypti and then tested the three most lethal oils for stage-specific differences in lethality. We also examined the effects of the most lethal (hempseed), moderately lethal (sunflower and peanut), and least lethal (olive) oils on survival to adulthood and oviposition behavior of gravid females. We hypothesized that the insecticidal activity of edible oils is a function of the content of their linoleic acid, a key fatty acid component with film-forming properties. Among the 13 oils tested, hempseed oil was the most lethal, with an LC50 of 348.25 ppm, followed by sesame (670.44 ppm) and pumpkinseed (826.91 ppm) oils. Oils with higher linoleic acid content were more lethal to larvae than those with low linoleic acid content. Furthermore, pure concentrated linoleic acid was more lethal to larvae compared to any edible oil. In comparison to early instars, late instars were more susceptible to hempseed, sunflower, peanut, and olive oils; these oils also acted as oviposition deterrents, with effective repellency ≥63%. The proportion of larvae surviving to adulthood was significantly reduced in hempseed, sunflower, peanut, and olive oil treatments relative to controls. Our results suggest that some edible plant oils have potential as effective, eco-friendly larvicides, and oviposition deterrents for controlling container-dwelling mosquitoes, especially in resource-limited settings.

Influence of the Linoleic Acid Content of the Diet on Tumor Growth in Transplantable Rat Tumor Models

1986 ◽  
Vol 30 (2) ◽  
pp. 120-128 ◽  
Author(s):  
Will J. Kort ◽  
Lorette O.M. Hulsman ◽  
Ineke M. Weijma ◽  
Pieter E. Zondervan ◽  
Dick L. Westbroek
Keyword(s):  
Linoleic Acid ◽  
Tumor Growth ◽  
Acid Content ◽  
Linoleic Acid Content ◽  
Tumor Models ◽  
Rat Tumor
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