The influence of environment upon the composition of sunflower seed oils. I.—Individual varieties of sunflowers grown in different parts of Africa

Barker, C.; Hilditch, T. P.

doi:10.1002/jsfa.2740010407

Cited by 23 publications

(2 citation statements)

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“…High temperature reduced percentage oil in the seed and the degree of unsaturation of the oil: the latter effect was largely the result of increase in oleic (18:1) at the expense of linoleic acid (18:2). Effects of climatic differences on the fatty acid composition of sunflower and other seed oils have been recorded by Barker & Hilditch (1950) and Bridge, Crossley & Hilditch (1951). In these reports, also, it was concluded that the main environmental factor affecting composition of the oil was temperature and, as in the present study, the main effect was on the degree of unsaturation of the oil.…”

Section: Discussionsupporting

confidence: 63%

Environmental effects on seed oil percentage and fatty acid composition in white lupin (Lupinus albus)

Williams

McGibbon

1980

J. Agric. Sci.

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SUMMARYThe effects of temperature, light intensity and nitrogen supply on the amount and fatty acid composition of the seed oil in Lupinus albus has been investigated. The percentage seed oil was reduced and its degree of saturation increased at higher temperatures. High temperatures during the dark period caused a reduction in percentage oil only when combined with day temperature of 20 °C, indicating a highly specific interaction between day and night temperatures. Shading reduced oil content, an effect which may determine response to population density and the optimal phenotype for high-oil cultivars.

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Section: Discussionsupporting

confidence: 63%

Environmental effects on seed oil percentage and fatty acid composition in white lupin (Lupinus albus)

Williams

McGibbon

1980

J. Agric. Sci.

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“…It has been observed that fatty acid composition of oil is influenced by cultivar, degree of maturity and environmental conditions (Ahmed and Young 1982) and that some plants produce great amounts of highly unsaturated fatty acids in their seeds when the crop encounters low temperatures (Barker and Hilditch 1950;Stumpf and Bradbeer 1959;Harris and James 1969). The effect, however, appears to be limited to certain species since Canvin (1964) showed that it occurs in the seeds of rape, sunflower and flax but not in safflower or castor.…”

Section: Achene Fatty Acid Profilementioning

confidence: 99%

Yield and quality response of autumn-planted sunflower (Helianthus annuus L.) to sowing dates and planting patterns

Saleem¹,

L.²,

Malik³

et al. 2008

Can. J. Plant Sci.

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Sowing time and sowing methods are often used to overcome environmental constraints on crop production. Information on the effect of these agronomic techniques on sunflower (Helianthus annuus L.) oil quality is, however, scarce. A field study was conducted to evaluate the effect of sowing dates and planting patterns, and their interaction, on seed yield and oil quality of hybrid sunflower. Sunflower hybrid Hysun-33 was sown at four dates beginning with the first week of August with fortnightly intervals under three planting patterns, viz., flat sowing (60 cm apart lines), ridge sowing (60 cm apart ridges) and bed sowing (90/30 cm) for 2 yr (2002 and 2003). The performance of the August sowing dates was significantly better with respect to yield and yield components than the September-sown crop. Among the three sowing dates in August, there was variable performance of the crop in the 2-yr study. On average, the sowing of sunflower from mid-August to the last week of August yielded better than early August sowing dates. The evaluation of quality parameters revealed greater content of achene oil in the September-sown crop followed by the crop sown in the last week of August. Delayed sowing lowered oleic acid content, but increased stearic and linoleic acid levels. Planting pattern treatments affected head diameter, achenes per head, 1000-achene weight and achene yield. Conclusively, sunflower sown on ridges during the second fortnight of August encountered favourable environmental conditions and gave significantly higher economic yield. Key words: Helianthus annuus , plantingg eometry, plantingpatterns, quality, sowingdates, sunflower yield

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The influence of environment upon the composition of sunflower seed oils. II.—Composition of the seed oils of sunflowers grown in English gardens from five specimens of different African sunflower seed

Barker¹,

Hilditch²

1950

J Sci Food Agric

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Five specimens of sunflower seeds from Africa, the oils in which varied widely in composition (44-72% linoleic acid), were grown in three English gardens in West and East Cheshire and Kent. The composition of the resulting English-grown seed oils was broadly the same in all cases, irrespective of the seed sown. Most of the oils contained, on an average, 68-70% of linoleic acid, but the extreme range of linoleic acid varied from about 60 t o 7j7,. The apparent rxplanation of these subordinate differences may lie in the cffect of direct sunlight on the ripening seed heads, since flower-heads that became completely inverted and faced downwards gave the oils with highest linoleic acid content ; others, in which the stems turned more or less through go" so that the lieads were more freely exposed to direct light, gave oils with somewhat reduced linoleic acid content. It is concluded that varietal factors play little part in determining the composition of sunflower seed oils. The main effect is that high linoleic content is conditioned by slow development and ripening of the seed, and rice z w s a ; climatic (temperature) conditions and also, probably, the degree of incidence of light on the ripening seed heads are tlie factors which control the rate of development of the sect1 and also the relative unsaturation of the seed oil.

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The influence of environment upon the composition of sunflower seed oils. I.—Individual varieties of sunflowers grown in different parts of Africa

Cited by 23 publications

References 1 publication

Environmental effects on seed oil percentage and fatty acid composition in white lupin (Lupinus albus)

Environmental effects on seed oil percentage and fatty acid composition in white lupin (Lupinus albus)

Yield and quality response of autumn-planted sunflower (Helianthus annuus L.) to sowing dates and planting patterns

The influence of environment upon the composition of sunflower seed oils. II.—Composition of the seed oils of sunflowers grown in English gardens from five specimens of different African sunflower seed

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