Improvement of the nutraceutical quality of broccoli sprouts by elicitation. (15th June 2016)

• Record Type: Journal Article
• Authors: Natella, Fausta; Maldini, Mariateresa; Nardini, Mirella; Azzini, Elena; Foddai, Maria Stella; Giusti, Anna Maria; Baima, Simona; Morelli, Giorgio; Scaccini, Cristina
• Is Part Of: Food chemistry. Volume 201(2016)
• Page Start: 101
• Page End: 109
• Publication Date: 2016-06-15
• Subjects: ANOVA one-way analysis of variance -- ACC 1-aminocyclopropane-l-carboxylic acid -- ESI-MS electrospray ionization source-mass spectrometry -- FRAP ferric reducing antioxidant power -- GAE gallic acid equivalents -- GL glucosinolate -- HPLC high performance liquid chromatography -- ITC isothiocyanates -- MeJa methyl jasmonate -- PCA principal component analysis -- SA salicylic acid -- THF tetrahydrofuran -- TEAC trolox equivalent antioxidant capacity; Broccoli sprouts -- Bioactive molecules -- Glucosinolate -- Phenolic compound -- Anthocyanin -- Elicitor; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2016.01.063
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: Phytochemical composition of broccoli sprouts exposed to different elicitors was studied. Biotic (ACC, MeJA, SA and sucrose) and abiotic (mannitol and NaCl) elicitors were used. Glucosinolates, vitamin C and E, β-carotene, total phenolics, flavonoids and anthocyanins were measured. The effect on bioactive molecules was concentration-dependent and elicitor-specific. Sucrose elicitation was the best condition to improve phytochemical composition. Abstract: Epidemiological studies show an inverse association between Brassica consumption and chronic diseases. Phytochemicals are thought to be beneficial for human health and therefore responsible for this protective effect. Increasing their levels into Brassica food is considered an expedient nutritional strategy that can be achieved through the manipulation of growth conditions by elicitors. In this work we systematically evaluated the influence of treatment with different elicitors (sucrose, mannitol, NaCl, 1-aminocyclopropane-l-carboxylic acid, salicylic acid and methyl jasmonate) on the phytochemical composition of broccoli sprouts. The content of total and single glucosinolates, total phenolic compounds, total flavonoids, total anthocyanins, vitamin C and E and β-carotene was assessed. The exposure to different elicitors produced concentration- and elicitor-dependent specific changes in the content of all the phytochemicals considered. Sucrose, identified as the most effective elicitor by principal component analysis, induced a significant increase of total and specific glucosinolates, vitamin C, total anthocyanins and polyphenols. Sucrose is likely to represent an effective tool to increase the nutritional value of broccoli sprouts.