The influence of sowing dates on the oil content and fatty acid composition of standard, mid-oleic and high-oleic types of sunflower (Helianthus annuus L.)

Abstract

This study aimed to determine the oil ratios and fatty acid compositions of sunflowers grown in the warm climate of the Çukurova region at different sowing dates. Ot was found that the crude fat ratios of standard, mid-oleic and high-oleic sunflower types were 42.57%, 39.35% and 39.07%, respectively. Crude oil ratios of high-oleic and mid-oleic sunflower types were significantly decreased (p<0.05) at SD4 (sowing date 4, May 30th). The oleic acid contents in standard, mid-oleic and high-oleic sunflower types were found to be 60.08%, 74.35% and 88.1%, respectively. The oleic acid ratios of standard sunflower types were determined to be significantly lower at SD1 (April 15th) (p<0.05). The results show that it is more appropriate to sow the sunflowers between SD1 and SD2 (15 April to 30 April) in terms of producing the required oil and oleic acid contents. Also, both oil ratios and fatty acid compositions can change according to the sowing dates.

γ‐Aminobutyric acid (GABA) mitigates drought and heat stress in sunflower (Helianthus annuus L.) by regulating its physiological, biochemical and molecular pathways

“…Both control and treated sunflower seed samples were powdered using grinder for the estimation of oil content following the protocol of Akkaya et al (2018). Briefly, 5 g of powdered samples were weighed as W i g, and transferred into the soxhlet extractor containing 180 ml petroleum ether (60–90°C) and extracted at 90°C for 5 h. Later, the solvent was evaporated under vacuum conditions and the residual matter was dried under vacuum at 60°C to a constant weight of W f g. The percentage of oil content was calculated as: …”

Culture Management and Application of Humic Acid in Favor of Helianthus annuus L. Oil Yield and Nutritional Homeostasis in a Dry Environment

“…The early sowing date outperformed the late sowing date in favor of all the variables studied except for the seed harvest index which was not affected. According to Akkaya et al (2019) and Mekdad et al (2021a), the temperature is the main climatic factor that affects plant productivity and the early sowing date gives the plants of many crops all their thermal unit requirements. Among these crops, sunflower thrives in climates that range from arid under irrigation to temperate under rainfed conditions (Steduto et al 2012).…”

Exploring the potential of inexpensive high oleic sunflower oil for new polymeric architectures

“…The aim of the current study is to obtain and evaluate high oleic sunflower oil (HO‐SFO)‐based polymeric architectures in terms of some properties at the crossroad between material performance and biomedical application. The HO‐SFO selection as starting material for bio‐based monomers with methacryl and PEG moieties and their derived polymeric networks was made considering availability, superior stability in processing and use comparing to standard oils 10,11 . Adequate unsaturation degree (≈90% oleic acid) and similitude with symmetrical triolein may produce, after rational chemical modification and polymerization, a predictable polymeric architecture, with tuned hydrophilicity due to additional PEG functionalization.…”