Temperature effect on triacylglycerol species in seed oil from high stearic sunflower lines with different genetic backgrounds

Abstract

BACKGROUND This study characterized the influence of temperature during grain filling on the saturated fatty acid distribution in triacylglycerol molecules from high stearic sunflower lines with different genetic backgrounds. Two growth chamber experiments were conducted with day/night temperatures of 16/16, 26/16, 26/26 and 32/26 °C. RESULTS In all genotypes, independently of the genetic background, higher temperatures increased palmitic and oleic acid and reduced linoleic acid concentrations. Increasing night temperature produced an increase in saturated‐unsaturated‐saturated species, indicating a more symmetrical distribution of saturated fatty acids. The solid fat index was more affected by temperature during grain filling in lines with high linoleic than high oleic background. Higher variations in symmetry among night temperatures were observed in lines with high oleic background, which are more stable in fatty acid composition. CONCLUSION The effect of temperature on triacylglycerol composition is not completely explained by its effect on fatty acid composition. Thus night temperature affects oil properties via its effects on fatty acid synthesis and on the distribution of fatty acids in the triacylglycerol molecules. © 2016 Society of Chemical Industry

Effect of genetic background on the stability of sunflower fatty acid composition in different high oleic mutations

“…Moreover, this trend showed differences in magnitude according to the genetic background or the high oleic mutation. This is in agreement with the general trend described by several authors working with different high oleic sunflower genotypes carrying the Pervenets mutation …”

Heat stress during seed development leads to impaired physiological function and plasticity in seed oil accumulation in Camelina sativa

“…This accelerated but defective development is also reflected in the oil accumulation stage, which occurs between 14 DPA and 21 DPA under CO, but between 7 and 14 DPA under HS (Figure 3; Table 1). In line with our observations in C. sativa, decreased seed set, seed filling, and quality were also reported in oil seed crops such as Brasicca napus, soybean, and sunflower (Faraji et al, 2009;Izquierdo et al, 2016;Nakagawa et al, 2020;Staniak et al, 2021;Mácová et al, 2022).…”

“…Floral development and seed yield are strongly affected by temperature, with milder temperatures resulting in higher yields (Krzyzȧniak et al, 2019;Zanetti et al, 2021). Furthermore, camelina accessions and cultivars grow in varying climatic niches throughout the globe, and temperature was found to elicit plasticity in seed oil in camelina (Brock et al, 2020) and other oil seed crops (Izquierdo et al, 2016;Xu et al, 2016;Alsajri et al, 2020;Nakagawa et al, 2020). C. sativa includes spring and winter biotypes, with spring biotypes being the most studied thus far since winter biotypes required vernalization for flowering (Anderson et al, 2018;Malik et al, 2018).…”

Effects of growing region and maturity stages on oil yield, fatty acid profile and tocopherols of Pistacia atlantica Desf. fruit and their implications on resulting biodiesel

“…This might be a reason for the higher oil contents in September for the Ain oussera and Laghouat regions. Similar to the results found in this study, Izquierdo et al [43] have suggested that the TAG biosynthesis increases considerably at lower temperatures. The oil accumulation is also affected by environmental factors other than the temperature: day length and light exposure, which vary with the season (Table 1).…”