Oil quality of maize and soybean genotypes with increased oleic acid percentage as affected by intercepted solar radiation and temperature

Insights into temperature effects on the fatty acid composition of oilseed rape varieties

“…Whereas it seemed to be an important source of fatty acid composition variation in sunflower (Izquierdo et al, 2009), maize and soybean (Zuil et al, 2012) no impact could be evidenced in OSR (Trémolières et al, 1982).…”

“…Nevertheless, unlike most conventional cultivar, temperature was not sufficient to draw satisfactory regression for HOLL cultivars Splendor and V141OL, Additionally to temperature effects, other parameters need to be considered to improve the prediction, such as radiation. Actually, divergent response to radiation could be found in the literature when considering different species as sunflower (Izquierdo et al, 2009), maize, soybean (Zuil et al, 2012) and OSR (Trémolières et al, 1982). Moreover, if the effect of radiation on ALA content could not be evidenced in field condition considering the correlation linking radiation and temperature, it could not be excluded either.…”

“…It was assumed that the range of our temperature data set, from 9.2 • C to 17.5 • C, was small enough to stay within the linear part of the curve, as no minimum and maximum values were observed. Actually, the temperature range used in this work was about a half of the one observed by Izquierdo and Aguirrezábal (2008) or Zuil et al (2012), and values were rather low. Data obtained in controlled conditions, with more extreme temperatures, would be necessary to determine these minima and maxima.…”

“…A strong negative correlation was reported between minimum or night temperature and oleic acid content in sunflower (Izquierdo et al, 2002;Izquierdo and Aguirrezábal, 2008), maize and soybean (Zuil et al, 2012). Garcés et al (1992) showed that oleic acid desaturation was affected by temperature through the activation of the enzyme synthesis at low temperatures.…”

Variability of Seed Fatty Acid Composition to Growing Degree-Days in High Oleic Acid Sunflower Genotypes

“…In soybean, Byfield and Upchurch (2007) found that decreased SAD transcript accumulation at warmer temperature was positively associated with a significantly increased level of stearic acid but only in a high stearic mutant line. Conversely, in a soybean genotype, the stearic acid percentage was negatively related to daily mean temperature during grain-filling period (Zuil et al, 2012). The effect of temperature on stearic acid content is unclear and seems to be genotype-specific.…”