Temperature effects on fatty acid composition during development of low‐linolenic oilseed rape (<i>Brassica napus</i> L.)

Deng, Xiaojie; Scarth, R.

doi:10.1007/s11746-998-0223-4

Cited by 60 publications

(56 citation statements)

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“…It is expected that the widest ridge received more solar radiation that make the surrounding environment with flax warmer than the other ridge width treatment and reflected on all the studied traits of quality of flax seed oil. When seed development happened through high temperatures, the fatty acid profile was higher in monounsaturated and saturated fatty acids and lower in polyunsaturated fatty acids, contrasted to seed development under lower temperatures (Denga & Scarthb, 1998). These results indicate that flax of 60 cm ridge width affected positively quality of flax seed oil (oleic acid, ώ6, ώ3, TUS and US/S).…”

Section: Effect Of Ridge Widthmentioning

confidence: 84%

Effect of Ridge Width and Cropping System on Productivity and Land Use Efficiency in Faba Bean-Flax Intercrops

Safina

2017

Egypt. J. Agron.

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IntroductionThe rising regard on sustainable agriculture enhances the cultivation of legumes as a tool of environmental optimization of resource use and preferment of pest pliability in cropping systems. It is known that weeds compete with crop plants for light, nutrients, soil moisture and space. Broomrape weed (Orobanche spp.) is root holoparasites that feed off a wide range of the most important legume crops. Furthermore, broomrape seeds to keep you can repeat vital good for 20 years or more in the nonattendance of the host plant (Kebreab & Murdoch, 1999). They act by attaching themselves to the roots of many plant species to obtain nutrients and water from their host. It is known that Orobanche crenata is a main necessity for grain and forage legume on over four Mha of the Mediterranean area (Parker, 2009). Egypt at present satisfies around 70% of its request out of incoming as a result of the effects of competition with other crops, and parasites such as Orobanche (ICARDA, 2017). TWO FIELD experiments were conducted at the Agricultural Experimental Station, Faculty of Agriculture, Cairo University, Giza, Egypt during 2014/2015 and 2015/2016 seasons. The study to investigate the performance of two faba bean varieties, i.e. Giza-843 and Giza-2 when intercropped with flax to productivity, land use efficiency, farmer's benefit and control broomrape in faba bean fields under two ridge widths. The experiment included 8 treatments which were the combination of two ridge widths (60 and 120 cm), two cropping systems (intercropping and solid planting) and two faba bean varieties (Giza-2 and Giza-843). The experimental design was a split-split plot design in randomized complete block arrangement with three replications. The results indicated that increasing ridge width from 60 to 120 cm decreased number of Orobanche crenata m -2 but it increased seed yield of the intercrops plant -1 and ha -1 . Intercropping flax with faba bean decreased number of Orobanche crenata -2 and seed yield plant -1 and ha -1 of both intercrop components. Faba bean cv. Giza-843 recorded the lowest values of number of Orobanche crenata m -2 and the highest values of yield and its attributes compared to Giza-2 variety. Also, faba bean cv. Giza-843 affected negatively seed yield of flax and its attributes. Most of the studied faba bean and flax traits were affected significantly by the interactions. The amount of fatty acids in flax seed was approximately 12.5 to 14.5% saturated (8.3 to 9.2% of palmitic acid and 4.2 to 5.3% of stearic acid) and 81.7 % to 85.2 % unsaturated fatty acids (20.9 to 22.3% of oleic acid, 13.0 to 14.2 % of ώ6 and 47.8 to 48.7% of ώ3). Total unsaturated fatty acids were not affected significantly by ridge width x cropping system x faba bean variety. Land equivalent ratio (LER) ranged from 1.63 for intercropping flax with Giza-2 variety in ridges 60 cm width to 1.86 for intercropping flax with Giza-843 variety in ridges 120 cm width. Land equivalent coefficient (LEC) exceeded 0.25. The dominance analysis proved that faba ...

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Section: Effect Of Ridge Widthmentioning

confidence: 84%

Effect of Ridge Width and Cropping System on Productivity and Land Use Efficiency in Faba Bean-Flax Intercrops

Safina

2017

Egypt. J. Agron.

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“…In the current work, the fatty acid profile of canola expellers (Table 4) appeared to fall in line with the literature (on average: C18:1, 55.5%; C18:2, 20.3%; C18:3, 6.3%). Deng and Scarth (1998) reported that the conventional canola oil contains about 6% SFA, 55-60% oleic acid, 20-26% linoleic acid, and 8-10% α-linolenic acid. The temperature and length of storage affected significantly only the PUFA content (P<0.05).…”

Section: Resultsmentioning

confidence: 99%

Effect of Pressing and Combination of Three Storage Temperatures and Times on Chemical Composition and Fatty Acid Profile of Canola Expellers

Guadagnin

Cattani

Bailoni

2013

Italian Journal of Animal Science

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This experiment investigated the effects of combinations of three temperatures and three storage times on the chemical composition, fatty acid profile, and oxidative stability of canola expellers obtained from the cold-pressing extraction of oil. Canola seeds were singlecrushed at moderate temperatures (60°C) during 3 pressing sessions. Nine samples (100±1 g) of each session were collected, inserted into sealed bags, stored at three temperatures (12, 24, 36°C) over 3 periods of time (10, 20, 30 d). Then, samples (100±1 g) of canola seeds collected before each pressing session and canola expellers collected before and after each storage time were analyzed for chemical composition, fatty acid profile, peroxide number and Kreis test. Before storage, the fatty acid profile of canola seeds and expellers differed significantly, except for myristic (P=0.18), palmitic (P=0.57), oleic (P=0.07), and α-linolenic acids (P=0.45). Compared to canola seeds, expellers showed greater content of saturated, poly-unsaturated, and n-6 fatty acids (P<0.01), but a lower content of mono-unsaturated fatty acids (P<0.01). Peroxide values were definitely (P<0.01) greater for expellers and averaged 4.22 and 4.11 mEq/kg fat before and after storage, respectively. The Kreis test was negative for all samples. Under different temperatures and times of storage, canola expellers showed to maintain a good oxidative stability, as highlighted by low peroxide values (<10 mEq/kg fat) and negative response for Kreis test. Canola expellers obtained by on-farm cold extraction, despite great oil residual (from 17 to 19% ether extract on dry matter basis), can be stored at farm without significant chemical and nutritional changes.

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“…In western Canada (Deng and Scarth 1998) and France (Bouchereau et al 1996), an increase in saturated and monounsaturated fatty acids and a concomitant decrease in polyunsaturated fatty acids was observed in B. napus when exposed to high temperatures during seed production. However, a 10-d moisture stress period applied at various stages of B. napus growth in a greenhouse study did not affect seed fatty acid saturation (Champolivier and Merrien 1996).…”

Section: Historymentioning

confidence: 99%

The Biology of Canadian Weeds. 137. Brassica napus L. and B. rapa L.

Gulden¹,

Warwick²,

Thomas³

2008

Can. J. Plant Sci.

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. 2008. The Biology of Canadian Weeds. 137. Brassica napus L. and B. rapa. Can. J. Plan Sci. 88: 951Á996. Brassica napus and B. rapa are native to Eurasia. In Canada, these species are commonly referred to as volunteer canola, while feral populations of B. rapa are referred to as birdrape. Brassica napus and B. rapa have been grown commercially for their seed oil content in western Canada since the middle of the last century and volunteer populations are common in fields. Escaped populations of both species are also found along roadways, railways and in waste areas; however, only B. rapa is known to have naturalized, self-sustaining feral populations in these habitats in eastern Canada. Despite these escaped and feral populations, B. napus and B. rapa are mainly a concern in agricultural fields where their combined relative abundance has increased over the past few decades. In the mid 1990s, herbicideresistant genotypes of B. napus were released for commercial production. Herbicide-resistance and the stacking of genes in volunteer populations conferring resistance to multiple herbicides have contributed to increased difficulties in controlling volunteer B. napus in some crops. However, yield loss resulting from volunteer populations is not well documented in Canada.Key words: Brassica napus, Brassica rapa, herbicide resistance, transgene escape, volunteer canola, weed biology Gulden, R. H., Warwick, S. I. et Thomas, A. G. 2008. La biologie des mauvaises herbes au Canada. 137. Brassica napus L. et B. rapa L. Can. J. Plant Sci. 88: 951Á996. Brassica napus et B. rapa sont des plantes originaires d'Eurasie. Au Canada, on les de´signe souvent sous l'expression « canola spontane´», tandis que les peuplements sauvages de B. rapa sont appele´s « navette ». Dans l'Ouest canadien, Brassica napus et B. rapa sont cultive´s commercialement pour l'huile que renferment leurs graines depuis le milieu du sie`cle dernier et les repousses spontane´es sont devenues monnaie courante dans les champs. On observe des peuplements des deux espe`ces le long des routes et des voies ferre´es ainsi que dans les terrains vagues, cependant on sait que seule B. rapa s'est acclimate´e pour donner des populations sauvages et stables dans les meˆmes habitats, dans l'est du pays. Malgre´cela, B. napus et B. rapa demeurent surtout pre´occupants dans les cultures, oul eur abondance relative, une fois combine´s, s'est accrue au cours des dernie`res de´cennies. Au milieu des anne´e 1990, des ge´notypes de B. napus re´sistants aux herbicides ont e´te´homologue´s pour la culture commerciale. Cette re´sistance et l'accumulation des ge`nes qui la codent dans les peuplements spontane´s ont concouru a`compliquer la lutte contre les repousses de B. napus dans certaines cultures. Quoi qu'il en soit, les pertes de rendement qui en re´sultent sont mal e´taye´es au Canada.

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Temperature effects on fatty acid composition during development of low‐linolenic oilseed rape (Brassica napus L.)

Cited by 60 publications

References 20 publications

Effect of Ridge Width and Cropping System on Productivity and Land Use Efficiency in Faba Bean-Flax Intercrops

Effect of Ridge Width and Cropping System on Productivity and Land Use Efficiency in Faba Bean-Flax Intercrops

Effect of Pressing and Combination of Three Storage Temperatures and Times on Chemical Composition and Fatty Acid Profile of Canola Expellers

The Biology of Canadian Weeds. 137. Brassica napus L. and B. rapa L.

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