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

Baux, Alice; Colbach, Nathalie; Allirand, Jean Michel; Jullien, Alexandra; Ney, Bertrand; Pellet, Didier

doi:10.1016/j.eja.2013.03.001

Cited by 29 publications

(18 citation statements)

References 15 publications

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“…Few studies included fertilization constraints even though interactions may occur (Nitrogen: Franzaring et al, 2012 ; Andrianasolo et al, 2014 ). Those studies on oilseed rape which analyzed the effects of S restriction (McGrath and Zhao, 1996 ; Ahmad and Abdin, 2000 ; Dubousset et al, 2010 ; D'Hooghe et al, 2013 , 2014 ; Girondé et al, 2014 ) or heat stress (Canvin, 1965 ; Baux et al, 2008 , 2013 ) were focused on seed FA content, accumulation of SSP and on sugar and S metabolism. The few studies on the effects of heat stress reported decreases in the proportion of unsaturated FAs (Canvin, 1965 ).…”

Section: Introductionmentioning

confidence: 99%

Heat stress during seed filling interferes with sulfur restriction on grain composition and seed germination in oilseed rape (Brassica napus L.)

et al. 2015

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In coming decades, increasing temperatures are expected to impact crop yield and seed quality. To develop low input systems, the effects of temperature and sulfur (S) nutrition in oilseed rape, a high S demanding crop, need to be jointly considered. In this study, we investigated the effects of temperatures [High Temperature (HT), 33°C/day, 19°C/night vs. Control Temperature (Ctrl T), 20°C/day, 15°C/day] and S supply [High S (HS), 500 μm SO2−4 vs. Low S (LS), 8.7 μM SO2−4] during seed filling on (i) yield components [seed number, seed dry weight (SDW) and seed yield], (ii) grain composition [nitrogen (N) and S contents] and quality [fatty acid (FA) composition and seed storage protein (SSP) accumulation] and (iii) germination characteristics (pre-harvest sprouting, germination rates and abnormal seedlings). Abscisic acid (ABA), soluble sugar contents and seed conductivity were also measured. HT and LS decreased the number of seeds per plant. SDW was less affected due to compensatory effects since the number of seeds decreased under stress conditions. While LS had negative effects on seed composition by reducing the FA contents and increasing the ratio S-poor SSPs (12S globulins)/S-rich SSPs (2S albumins) ratio, HT had positive effects by increasing S and FA contents and decreasing the C18:2/C18:3 ratio and the 12S/2S protein ratio. Seeds produced under HT showed high pre-harvest sprouting rates along with decreased ABA contents and high rates of abnormal seedlings. HT and LS restriction significantly accelerated germination times. High conductivity, which indicates poor seed storage capacity, was higher in HT seeds. Consistently, the lower ratio of (raffinose + stachyose)/sucrose in HT seeds indicated low seed storage capacity. We demonstrated the effects of HT and LS on grain and on germination characteristics. These results suggest that hormonal changes might control several seed characteristics simultaneously.

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Section: Introductionmentioning

confidence: 99%

Heat stress during seed filling interferes with sulfur restriction on grain composition and seed germination in oilseed rape (Brassica napus L.)

et al. 2015

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“…Furthermore, it has also an influence on oil quality (Baux et al, 2008, 2013). In the present study, the effect of temperature on leaf expansion was investigated in oilseed rape.…”

Section: Discussionmentioning

confidence: 99%

Modeling Allometric Relationships in Leaves of Young Rapeseed (Brassica napus L.) Grown at Different Temperature Treatments

Tian

Henke

et al. 2017

Front. Plant Sci.

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Functional–structural plant modeling (FSPM) is a fast and dynamic method to predict plant growth under varying environmental conditions. Temperature is a primary factor affecting the rate of plant development. In the present study, we used three different temperature treatments (10/14°C, 18/22°C, and 26/30°C) to test the effect of temperature on growth and development of rapeseed (Brassica napus L.) seedlings. Plants were sampled at regular intervals (every 3 days) to obtain growth data during the length of the experiment (1 month in total). Total leaf dry mass, leaf area, leaf mass per area (LMA), width-length ratio, and the ratio of petiole length to leaf blade length (PBR), were determined and statistically analyzed, and contributed to a morphometric database. LMA under high temperature was significantly smaller than LMA under medium and low temperature, while leaves at high temperature were significantly broader. An FSPM of rapeseed seedlings featuring a growth function used for leaf extension and biomass accumulation was implemented by combining measurement with literature data. The model delivered new insights into growth and development dynamics of winter oilseed rape seedlings. The present version of the model mainly focuses on the growth of plant leaves. However, future extensions of the model could be used in practice to better predict plant growth in spring and potential cold damage of the crop.

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“…However, Elferjani and Soolanayakanahally (2018) found an opposite response. Using 10 years of field data and following a modelling approach, Baux et al (2013) observed an increase in oleic acid (C18:1) in conventional oilseed rape and high-oleic low-linolenic (HOLL) varieties associated with minimum temperature, coincided by a decrease in linoleic acid (C18:2) and linolenic acids (C18:3) concentration. In contrast, Zhou et al (2018) reported that HNT significantly decreased the total fatty acids and relative proportions of C18:0, C18:1, C20:1, in seeds of both low and high oil concentration cultivars but increased the proportions of C18:2 and C18:3 in both cultivars under HNT (19°C) compared to low night (9°C) temperatures.…”

Section: Hnt Alters Saturated Fatty Acids But Not Unsaturated Fattymentioning

confidence: 99%

“…Previous studies demonstrate that HDT stress during pod filling results in reduced oil concentration and increased protein concentration in oilseed crops (Aksouh-Harradj et al, 2006;Singer, Zou, & Weselake, 2016;Zhu et al, 2012 [canola]), (Dombos & Mullen, 1992;Gibson & Mullen, 1996 [soybean]). Similarly, a negative correlation between monounsaturated and polyunsaturated fatty acids has been observed with HDT stress exposure in a number of oilseed crops, including canola (Aksouh-Harradj et al, 2006;Baux et al, 2013;Deng & Scarth, 1998;Elferjani & Soolanayakanahally, 2018), sunflower (Nagao & Yamazaki, 1984;Flagella, Rotunno, Tarantino, Di Caterina, & De Caro, 2002) and soybean (Dornbos & Mullen, 1992;Gibson & Mullen, 1996). In summary, day-time heat stress is shown to alter the oil and protein composition and reduce beneficial monoand polyunsaturated fatty acids, while the impact of HNT on these fatty acids is not known either in canola or in other Brassica species.…”

Section: Introductionmentioning

confidence: 97%

High night‐time temperature during flowering and pod filling affects flower opening, yield and seed fatty acid composition in canola

Pokharel

Chiluwal

Stamm

et al. 2020

J Agronomy Crop Science

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Winter canola (Brassica napus L.) is highly sensitive to increasing temperatures during the reproductive and pod‐filling stages. Although the impact of high day‐time temperature stress on yield and quality has been documented in canola, similar information under high night‐time temperature (HNT) stress is not available. Using six hybrids and four open‐pollinated cultivars, we observed a marked shift in peak flowering towards earlier, cooler hours of the morning under HNT. Averaged across two independent experiments, the photochemical efficiency of photosystem II was significantly decreased (3%), with a significant increase in thylakoid membrane damage (13%) in the leaves of susceptible cultivars under HNT stress. Similarly, the susceptible cultivars also recorded significant reduction in biomass (34%), pod number (22%), pod weight (37%) and total seed weight (40%) per plant while the same set of agronomic traits were not affected among the tolerant cultivars. Quantitative impact of heat stress was confirmed with increased sensitivity to HNT exposure from gametogenesis until maturity resulting in a significantly higher yield loss compared to stress exposure from post‐flowering till maturity. HNT significantly decreased oil concentration, but increased protein concentration and saturated fatty acid levels in seeds of the susceptible cultivars. However, HNT had no impact on the unsaturated fatty acids in both hybrids and the open‐pollinated cultivars. Breeding targets based on fatty acid composition for enhancing canola seed quality may not be easily amenable due to the inconsistency documented with the compositional changes under heat stress. In summary, our findings conclude that canola hybrids are better suited to regions experiencing heat stress, compared to open‐pollinated cultivars, indicating the possibility of a complete shift to hybrid canola cultivation under predicted hotter climates in the future.

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

Cited by 29 publications

References 15 publications

Heat stress during seed filling interferes with sulfur restriction on grain composition and seed germination in oilseed rape (Brassica napus L.)

Heat stress during seed filling interferes with sulfur restriction on grain composition and seed germination in oilseed rape (Brassica napus L.)

Modeling Allometric Relationships in Leaves of Young Rapeseed (Brassica napus L.) Grown at Different Temperature Treatments

High night‐time temperature during flowering and pod filling affects flower opening, yield and seed fatty acid composition in canola

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