期刊
FOOD CHEMISTRY
卷 133, 期 3, 页码 1025-1033出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2012.01.021
关键词
Rocket salad; Eruca sativa Mill.; Diplotaxis tenuifolia L.; Glucosinolates; Phenolic compounds; HPLC-DAD-MS
The glucosinolate and phenolic profiles of 37 rocket salad accessions (32 Eruca sativa and 5 Diplotaxis tenuifolia) were obtained by liquid chromatography-mass spectrometry. Eleven desulpho-glucosinolates (DS-GLSs) were isolated and the glucosinolate profiles did not differ between the two species. Total DS-GLS content, expressed as sinigrin equivalents (SE) revealed a certain variability, ranging from 0.76 to 2.46 g kg(-1) d.w. but, again, the quantitative analysis did not discriminates Eruca from Diplotaxis. The polyphenol evaluation by HPLC-DAD-MS allowed the identification of two different classes of compounds in the two rocket salad species. Qualitative differences were observed between the polyphenol profiles at specific level: quercetin derivatives were the main phenolics of Diplotaxis, whereas kaempferol derivatives characterised Eruca samples. The contents of total flavonoids determined as rutin equivalents (RE) ranged from 4.68 to 31.39 g kg(-1) d.w. Kaempferol-3,4'-diglucoside (71.4-82.2%) and isorhamnetin-3,4'-di-glucoside (7.8-18.4%) were always isolated as first and second more abundant phenolic compounds in Eruca samples. No marker phenolic compounds were isolated in Diplotaxis samples. (C) 2012 Elsevier Ltd. All rights reserved.
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