Effect of dehulling on the composition of antinutritive compounds in various cultivars of rapeseed

Matthäus, Bertrand

doi:10.1002/(sici)1521-4133(199807)100:7<295::aid-lipi295>3.0.co;2-g

Cited by 34 publications

(22 citation statements)

References 28 publications

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“…These observations call into question the validity of previous studies which sought to extract and quantify PA in seeds of the Brassicaceae. 12,13,31,46 In situ identification of unextractable seed coat pigments and new pigmentation patterns in the Brassicaceae Since pigments could not be fully extracted from seed coat tissue, sensitive histochemical staining methods, together with microscopic evaluation of the seed coat after staining, were used to determine seed coat chemical constituents and patterns of pigmentation among the Brassicaceae without quantification. After 6-8 h of staining in BuOH/HCl, an orange-red colour developed in the seed coat of the pigmented Brassicaceae accessions, indicative of the slow hydrolysis of a PA polymer.…”

Section: Unextractable Pa In the Brassicaceaesupporting

confidence: 91%

“…12,28 For example, modified phenylpropanoids and high fibre concentration have been implicated in the low weight gains of non-ruminant livestock and poultry that were fed canola meal. 29,30 The seed coat especially must be considered by plant breeders when developing lines with reduced fibre and antinutritional compounds, 12,13,31 because approximately 18% of the defatted meal weight can be attributed to the seed coat in B napus. 27 Moreover, if canola is to compete economically with other seed meals, a completely unpigmented seed coat is required owing to market preference for uniformly coloured feed meal.…”

Section: Introductionmentioning

confidence: 96%

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Histochemical characterisation of unextractable seed coat pigments and quantification of extractable lignin in the Brassicaceae

Marles

Gruber

2004

J Sci Food Agric

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The differences determined by in situ histochemical staining and thioglycolic lignin analyses provided a new view of seed coat composition in a range of yellow-and brown-seeded germplasm of the Brassicaceae. Unextractable seed coat pigments were composed of proanthocyanidin (condensed tannin) polymers. Anthocyanins were absent in all seed coat tissues. Proanthocyanidin was deposited over the entire seed coat in dark-seeded germplasm and in patches in some yellow-seeded germplasm. The seed coat and hilum of Crambe abyssinica cv Prophet and some yellow-seeded accessions contained an unidentified, unreactive brown pigment. Several new pigmentation patterns, occurring as spots and patches and surrounding the hilum, became apparent from this analysis. Thioglycolic lignin was significantly lower in yellow-seeded samples compared with the dark-seeded accessions, and the majority of the lignin occurred in the seed coat. These discoveries provide new and useful data for plant breeders and indicate the need to use more detailed analytical methods in breeding programmes that have the goal of improving seed meal quality by reducing fibre and phenolics.

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Section: Unextractable Pa In the Brassicaceaesupporting

confidence: 91%

Section: Introductionmentioning

confidence: 96%

Histochemical characterisation of unextractable seed coat pigments and quantification of extractable lignin in the Brassicaceae

Marles

Gruber

2004

J Sci Food Agric

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“…The level of extractable phenolics of defatted canola meal ranges from 1.59-1.84 g/100 g of defatted canola meal and 0.62-1.28 g/100 g of the seed flour (Dabrowski and Sosulski, 1984;Naczk et al, 1998). Sinapine, the choline ester of sinapic acid is the most prominent phenolic compound of canola and the contents range from 6.8-10 mg/g of seed for European cultivars (Matthäus, 1998), 6-18 mg/g of defatted meal for Canadian canola (CCC, 2016), and 13-15 mg/g of defatted meal for Australian canola (Mailer et al, 2008). Reported total phenolic acid content in Puratein was 0.40% and Supertein TM was 0.26%, in which 93-96% was sinapic acid.…”

Section: Non-proteinaceous Compounds Associated With Canola Proteinmentioning

confidence: 99%

Canola/rapeseed protein-functionality and nutrition

Wanasundara¹,

McIntosh²,

Perera³

et al. 2016

OCL

135

103

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-Protein rich meal is a valuable co-product of canola/rapeseed oil extraction. Seed storage proteins that include cruciferin (11S) and napin (2S) dominate the protein complement of canola while oleosins, lipid transfer proteins and other minor proteins of non-storage nature are also found. Although oil-free canola meal contains 36-40% protein on a dry weight basis, non-protein components including fibre, polymeric phenolics, phytates and sinapine, etc. of the seed coat and cellular components make protein less suitable for food use. Separation of canola protein from non-protein components is a technical challenge but necessary to obtain full nutritional and functional potential of protein. Process conditions of raw material and protein preparation are critical of nutritional and functional value of the final protein product. The storage proteins of canola can satisfy many nutritional and functional requirements for food applications. Protein macromolecules of canola also provide functionalities required in applications beyond edible uses; there exists substantial potential as a source of plant protein and a renewable biopolymer. Available information at present is mostly based on the protein products that can be obtained as mixtures of storage protein types and other chemical constituents of the seed; therefore, full potential of canola storage proteins is yet to be revealed.Keywords: Canola / rapeseed storage proteins / cruciferin / napin / protein digestibility / functional properties Résumé -Protéines de canola et de colza : fonctionnalités et nutrition. Les tourteaux riches en protéines repré-sentent un coproduit de valeur de l'extraction de l'huile de canola/colza. Dans la graine, les protéines de stockage, notamment la cruciférine (11S) et la napine (2S), dominent la fraction protéique du canola, mais des oléosines, des protéines de transfert de lipides et d'autres protéines mineures non dédiées au stockage sont également présentes. Bien que le tourteau de canola déshuilé contienne 36-40 % de protéines sur poids sec, la présence de composants non protéiques, dont les fibres, les polymères phénoliques, les phytates, la sinapine, etc. issus de l'enveloppe de la graine et des composants cellulaires rendent les protéines moins appropriées à une utilisation en alimentation humaine. Cette revue présente les connaissances actuelles en termes de valeur nutritionnelle et fonctionnelle des protéines issues des graines de canola. La séparation des protéines de canola des composants non protéiques représente un défi technique mais nécessaire pour libérer totalement le potentiel nutritionnel et fonctionnel de la protéine. Les protéines de stockage de canola peuvent satisfaire un grand nombre d'exigences nutritionnelles et fonctionnelles pour des applications alimentaires. Les macromolécules protéiques de canola offrent également des fonctionnalités requises dans les applications dépassant les seules utilisations alimentaires ; un potentiel important existe en tant que source de protéines végétales et de biopol...

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“…Glucosinolates are therefore clearly very unevenly split between kernels and hulls, with the vast majority found in kernels which is in accordance with results published by Matthäus (1998). …”

Section: Glucosinolate Contentsmentioning

confidence: 99%

Hull content and chemical composition of whole seeds, hulls and germs in cultivars of rapeseed (Brassica napus)

Carré¹,

Citeau²,

Robin³

et al. 2016

OCL

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-Objective:To study of the compositional breakdown of seed components between the integument and the germ and its variability according to genetic and environmental factors. Methods: The study used 19 rapeseed lots grown in two areas of contrasted agronomical potential harvested in 2011. Pure fractions of hulls and germs were mechanically separated by centrifuge impacts after freezing the seeds. Chemical composition of the whole seeds and the pure kernel and hull fractions was determined. The results were used to calculate the seed hull content. Results: Hull accounted for 18.2% of total seed content. Real oil content of the hulls (8.4% dry basis) was lower than in the literature. Hulls contained 2.9% of the oil, 11.2% of the proteins, 73% of the NDF; 80% of the ADF, 95% of the lignin and 6.0% of the glucosinolates of the whole seed. The percentage of hulls in total seed content shows low variability, although the oil and the protein content of the fractions were significantly affected by cultivar and to a lesser extent by geographic location of the crops. Conclusion: Completely dehulled seeds could result in a meal with 48.3% protein (dry basis) and low fiber content (10.8% NDF, 6.6% ADF, 0.5% ADL) but higher glucosinolate content (130% compared to defatted seeds). Keywords:Dehulling / rapeseed / characterization / proteins / oil / hull Résumé -Teneur en pellicules et composition chimique des graines, pellicules et germes du colza (Brassica napus). Objectifs : Étude de la répartition des composants de la graine entre les téguments et le germe ainsi que leur variabilité selon les facteurs génétiques et environnementaux. Méthodes : Dix-neuf lots de graines issus de 2 lieux de culture ayant des potentiels agronomiques contrastés en 2011 ont été étudiés. Des fractions pures de pellicules et de germes ont été séparées par impacts centrifuges après que les graines aient été congelées. La composition chimique des fractions amandes et pellicules pures a été déterminée. Ces résultats ont servi à calculer le taux de pellicules des graines. Résultats : La teneur en pellicules des graines est de 18,2 %. La teneur en huile des pellicules (8,4 % sur matière sèche) est moindre que dans les données de la littérature. Les pellicules contiennent 2,9 % de l'huile présente dans les graines, 11,2 % des protéines, 73 % du NDF, 80 % de l'ADF, 95 % de la lignine et 6 % des glucosinolates. Le taux de pellicules a une faible variabilité bien que leur teneur en huile et en protéines soit sous l'effet de facteurs génétiques et dans une moindre mesure des conditions du milieu. Conclusion : L'élimination totale des pellicules pourrait aboutir à un tourteau à 48,3 % de protéines (matière sèche) et pauvre en fibres (10,8, 6,6, 0,5 % pour NDF, ADF et ADL) mais plus riche en glucosinolates (130 % de la valeur des graines déshuilées).

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Effect of dehulling on the composition of antinutritive compounds in various cultivars of rapeseed

Cited by 34 publications

References 28 publications

Histochemical characterisation of unextractable seed coat pigments and quantification of extractable lignin in the Brassicaceae

Histochemical characterisation of unextractable seed coat pigments and quantification of extractable lignin in the Brassicaceae

Canola/rapeseed protein-functionality and nutrition

Hull content and chemical composition of whole seeds, hulls and germs in cultivars of rapeseed (Brassica napus)

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