Topic
Rapeseed
About: Rapeseed is a research topic. Over the lifetime, 2945 publications have been published within this topic receiving 51790 citations. The topic is also known as: Brassica napus & rape.
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TL;DR: It is postulated that linolenic acid plays a role in the etiology of cardiac necrosis observed when rats are fed diets containing low erucic acid rapeseed oils, comparable to those obtained for low erucaic acid rapessed oil and soybean oil which were similar.
Abstract: Male Wistar rats were fed semipurified diets containing 20% fat for 25 weeks. Ten different oils or oil blends were employed, including rapeseed oils, simulated rapeseed-type oils, and modified rapeseed-type oils. Safflower, soybean, and hydrogenated coconut oils served as control oils. Histopathological examination of the cardiac tissue was conducted at the end of the study and an incidence-severity rating assigned to the lesions induced by each fat. Oils containing high levels of erucic acid (26–30%) induced the most severe cardiac necrosis, irrespective of the source of erucic acid (rapeseed oil or nasturtium oil). Increasing the linoleic: linolenic acid ratio of the high erucic oils to that of soybean oil failed to reduce necrosis, but the absence of linolenic acid from a high erucic acid oil blend resulted in a markedly reduced lesion incidence-severity rating, comparable to those obtained for low erucic acid rapessed oil and soybean oil which were similar. Lowest lesion incidence was obtained with safflower oil and hydrogenated coconut oil. We have postulated that linolenic acid plays a role in the etiology of cardiac necrosis observed when rats are fed diets containing low erucic acid rapeseed oils.
55 citations
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01 Jan 1980
TL;DR: This chapter presents a summary of the structure and fatty acid composition of plant triacylglycerols and their accumulation and storage in plant cells as a background for the discussion of biosynthetic pathways.
Abstract: Publisher Summary Triacylglycerols are esters of glycerol in which each of the three hydroxyl groups is esterified with a fatty acid. In the plant kingdom, the main sources of triacylglycerols are oil-rich seeds. For plants, they are important as reserves of energy to fuel the germination of the seed; for humans, they are a prime source of food. Of the several 100 varieties of plants known to have oil-bearing seeds, only a dozen are significant commercially. They are soybean, cottonseed, groundnut, sunflower, coconut, oil palm, olive, sesame, linseed, rapeseed, castor, and tung and of these, rapeseed, castor, and tung are used for industrial purposes other than as edible oils. This chapter presents a summary of the structure and fatty acid composition of plant triacylglycerols and their accumulation and storage in plant cells as a background for the discussion of biosynthetic pathways. It discusses the future trends in which the biochemistry of plants would be influenced by plant breeding or genetic engineering.
55 citations
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TL;DR: Low PA mutants could mark an important milestone in rapeseed breeding with an increase in protein value and no adverse effects on oil contents and adopted CRISPR‐Cas9 mutagenesis to knock out three functional paralogs of BnITPK.
Abstract: Commercialization of Brassica napus. L (oilseed rape) meal as protein diet is gaining more attention due to its well-balanced amino acid and protein contents. Phytic acid (PA) is a major source of phosphorus in plants but is considered as anti-nutritive for monogastric animals including humans due to its adverse effects on essential mineral absorption. The undigested PA causes eutrophication, which potentially threatens aquatic life. PA accounts to 2-5% in mature seeds of oilseed rape and is synthesized by complex pathways involving multiple enzymes. Breeding polyploids for recessive traits is challenging as gene functions are encoded by several paralogs. Gene redundancy often requires to knock out several gene copies to study their underlying effects. Therefore, we adopted CRISPR-Cas9 mutagenesis to knock out three functional paralogs of BnITPK. We obtained low PA mutants with an increase of free phosphorus in the canola grade spring cultivar Haydn. These mutants could mark an important milestone in rapeseed breeding with an increase in protein value and no adverse effects on oil contents.
54 citations
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TL;DR: In this paper, the authors compared gene expression during seed development between two lines of Brassica napus with a 10% difference in oil content, and found that six genes were highly expressed in seeds with low oil content.
Abstract: The regulation of seed oil synthesis in rapeseed is largely unknown. In this study, we compared the gene expression during seed development between two lines of Brassica napus with a 10% difference in oil content. We isolated the immature seeds 15 and 25 days after flowering at periods preceding and including the major accumulation of storage oils and proteins. The differentially expressed gene clones between the two rape lines were isolated by subtractive suppression hybridization (SSH). All SSH clones were arrayed and screened by dot blot hybridization, followed by RT-PCR analysis for selected clones. A total of 217 cDNA clones corresponding to 30 genes were found to have a high expression in seeds with high oil content. Six genes were highly expressed in seeds with low oil content. Northern blot and enzyme activity analysis demonstrated a change in expression pattern of several genes. The results provide information on gene-encoding factors responsible for the regulation of oil synthesis. The possible role of these genes in seeds is discussed. The genes in this study may be suitable as novel targets for genetic improvement of seed oil content and may also provide molecular markers for studies of rape breeding.
54 citations
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01 Jan 1983
TL;DR: High and low erucic acid rapeseed oils :production, usage, chemistry, and toxicological evaluation, High and low Erucic Acid rapeseed oil : production, used, science, and Toxicological evaluation.
Abstract: High and low erucic acid rapeseed oils :production, usage, chemistry, and toxicological evaluation , High and low erucic acid rapeseed oils :production, usage, chemistry, and toxicological evaluation , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
54 citations