Variation of glucosinolates and nutritional value in nabicol (Brassica napus pabularia group)

Abstract

Glucosinolate levels in leaves were determined in a collection of 36 varieties of nabicol (Brassica napus pabularia group) from northwestern Spain grown at two locations. Crude protein, acid detergent fibre, and sensory traits were also assessed by a consumer panel. The objectives were to determine the diversity among varieties in total glucosinolate content and glucosinolate profile and to evaluate their sensory attributes in relation to glucosinolate content for breeding purposes. Eight glucosinolates were identified, being the aliphatic glucosinolates, glucobrassicanapin, progoitrin, and gluconapin the most abundant. Glucosinolate composition varied between locations although the glucosinolate pattern was not significantly influenced. Differences in total glucosinolate content, glucosinolate profile, protein, acid detergent fibre, and flavour were found among varieties. The total glucosinolate content ranged from 1.4 mmol g À1 to 41.0 mmol g À1 dw at one location and from 1.2 mmol g À1 to 7.6 mmol g À1 dw at the other location. Sensory analysis comparing bitterness and flavour with variation in glucosinolate, gluconapin, progoitrin, and glucobrassicanapin concentrations suggested that other phytochemicals are probably involved on the characteristic flavour. The variety MBG-BRS0035 had high total glucosinolate, glucobrassicanapin, and gluconapin contents at both locations and could be included in breeding programs to improve the nutritional value of this vegetable crop.

Extraction, Identification and Comparison of Glucosinolates Profiles in the Seeds of Broccolini, Broccoli and Chinese Broccoli

“…Notes -as broccolini, although the Brassicaceae family has been widely investigated for glucosinolates [4][5][6]. Studies have showed that the plant seeds are the best bulk source of quantities of glucosinolates, because they often contain as much as 10-40 times higher concentrations of glucosinolates than other vegetative tissues [1].…”

Glucosinolates in Brassica foods: bioavailability in food and significance for human health

“…Vegetable crops of B. napus include leaf rape and swedes. Cartea et al (2007a) found that glucobrassicanapin followed by progoitrin and gluconapin proved to be the most abundant glucosinolates in a variety of leaf rape called 'nabicol'. In swedes, glucobrassicin, progoitrin and gluconasturtiin have …”

“…Major glucosinolates found in each crop are shown in bold GIB: glucoiberin (3-methylsulfinylpropyl); PRO: progoitrin (2-hydroxy-3-butenyl); SIN: sinigrin (2-propenyl); GAL: glucoalysiin (5-methylsulphinylpentyl); GRA: glucoraphanin (4-methylsulphinylbutyl); GNA: gluconapin (3-butenyl); GBN: glucobrassicanapin (4-pentenyl); GIV: Glucoiberverin (3-methylthiopropyl); GER: glucoerucin (4-methylthiobutyl); GNL: gluconapoleiferin (2-hydroxy-4-pentenyl); GBS: glucobrassicin (3-indolylmethyl); NGBS: neoglucobrassicin (1-methoxy-3-indolylmethyl); 4HGBS: 4-hydroxyglucobrassicin (4-hydroxy-3-indolylmethyl); 4MGBS: 4-methoxyglucobrassicin (4-methoxy-3-indolylmethyl), GST: Gluconasturtiin (2-phenylethyl) Sources a VanEtten et al (1980) b Sones et al (1984) c Cartea et al (2007b) d Ciska et al (2000) e Carlson et al (1987) f Rosa et al (1996) g Kushad et al (1999) h Padilla et al (2007) i Rosa (1997) j Cartea et al (2007a) Phytochem Rev (2008) 7:213-229 215 been found as the major glucosinolates (Carlson et al 1987). As components of feed and food, some abovementioned glucosinolates as source of bioactive compounds (i.e., isothiocyanates, thiocyanates, nitriles and epithionitriles) have been recognized for long for their distinctive benefits to human nutrition and plant defence.…”

Handbook of Plant Food Phytochemicals

“…pabularia) [23,126], 27 varieties of Chinese kale (B. oleracea var. alboglabra) [167], 28 varieties of cabbage (B. oleracea var.…”